Prakash Surya [Mon, 6 Oct 2014 14:32:36 +0000 (16:32 +0200)]
Illumos 5213 - panic in metaslab_init due to space_map_open returning ENXIO
5213 panic in metaslab_init due to space_map_open returning ENXIO
Reviewed by: Matthew Ahrens mahrens@delphix.com
Reviewed by: George Wilson george.wilson@delphix.com
Isaac Huang [Thu, 30 Oct 2014 19:29:58 +0000 (13:29 -0600)]
Fix inaccurate field descriptions
The field descriptions from arcstat.py -v for the demand accesses
are inaccurate. They all begin with "Demand Data" yet the fields
actually covered both demand data and demand meta-data accesses.
Signed-off-by: Isaac Huang <he.huang@intel.com> Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Closes #2842
Chris Wedgwood [Thu, 23 Oct 2014 23:00:41 +0000 (16:00 -0700)]
Reduce buf/dbuf mutex contention
Due to evidence of contention both the buf_hash_table and the
dbuf_hash_table sizes have been increased from 256 to 8192.
This increase in hash table size adds approximating 0.5M to
our fixed memory footprint. This relatively small increase
is not expected to cause problems even on low memory machines.
This footprint will also become dynamic when the persistent
L2ARC support is finalized. In the meanwhile, this small
change significantly reduces contention for certain workloads.
Signed-off-by: Chris Wedgwood <cw@f00f.org> Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov> Signed-off-by: Pavel Snajdr <snajpa@snajpa.net>
Closes #1291
Alex Zhuravlev [Thu, 13 Nov 2014 18:09:05 +0000 (10:09 -0800)]
Export symbols for ZIL interface
These symbols are needed by consumers (i.e. Lustre) who wish to
integrate with the ZIL. In addition the zil_rollback_destroy()
prototype was removed because the implementation of this function
was removed long ago.
Signed-off-by: Alex Zhuravlev <alexey.zhuravlev@intel.com> Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Closes #2892
Change the zvol helper program to replace any embedded spaces
in the pool or dataset names with '+' to ensure we have valid
symlinks.
The '+' character was choosen because it is not a valid character
for a dataset name but it is allowed by udev. This ensures that
all dataset names with an embedded space will be translated to
a unique /dev/zvol/ symlink.
Signed-off-by: Dan Swartzendruber <dswartz@druber.com> Signed-off-by: Darik Horn <dajhorn@vanadac.com> Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Closes #2834
Marcel Wysocki [Wed, 29 Oct 2014 11:11:43 +0000 (12:11 +0100)]
Add config/compile to config/.gitignore
This file may be added by automake and therefore should be added
to config/.gitignore. For the full list of possible auxiliary
programs see the full automake documentation.
Richard Yao [Thu, 18 Sep 2014 13:47:16 +0000 (09:47 -0400)]
Make systemd-modules-load.service file directory configurable
Installing outside of the prefix is not permissible under Gentoo Prefix.
The package manager will cause the installation process to fail if/when
it sees this. We could handle this by disabling systemd support on
prefix because systemd does not check these paths, but the Gentoo
Council decided that small files such as these should be installed.
That means disabling systemd support on prefix is not an acceptable
workaround. As a consequence, we need some way of control the directory
into which these files are installed.
Making this configurable increases our compliance with the
freedesktop.org specification, which allows these files to be installed
into /etc/modules-load.d:
Richard Yao [Fri, 29 Aug 2014 18:16:41 +0000 (14:16 -0400)]
Make directory into which mount.zfs is installed configurable
Installing outside of the prefix is not permissible under Gentoo Prefix.
The package manager will cause the installation process to fail if/when
it sees this. I could script a workaround inside the ebuild, but it
seemed to make more sense to make this more configurable.
Signed-off-by: Richard Yao <richard.yao@clusterhq.com> Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Issue #2641
Richard Yao [Fri, 29 Aug 2014 17:09:52 +0000 (13:09 -0400)]
Search /usr/local/src for SPL Object Directory
Since we changed the default location for the kernel headers to respect
--prefix in the SPL, we must search that location to prevent user builds
from breaking.
Signed-off-by: Richard Yao <richard.yao@clusterhq.com> Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Issue #2641
Tim Chase [Thu, 2 Oct 2014 12:21:08 +0000 (07:21 -0500)]
Linux 3.12 compat: shrinker semantics
The new shrinker API as of Linux 3.12 modifies "struct shrinker" by
replacing the @shrink callback with the pair of @count_objects and
@scan_objects. It also requires the return value of @count_objects to
return the number of objects actually freed whereas the previous @shrink
callback returned the number of remaining freeable objects.
This patch adds support for the new @scan_objects return value semantics.
Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov> Signed-off-by: Tim Chase <tim@chase2k.com>
Closes #2837
Matthew Ahrens [Sat, 13 Sep 2014 13:40:05 +0000 (15:40 +0200)]
Illumos 5164-5165 - space map fixes
5164 space_map_max_blksz causes panic, does not work
5165 zdb fails assertion when run on pool with recently-enabled
space map_histogram feature
Reviewed by: Christopher Siden <christopher.siden@delphix.com>
Reviewed by: George Wilson <george.wilson@delphix.com>
Reviewed by: Saso Kiselkov <skiselkov.ml@gmail.com>
Approved by: Dan McDonald <danmcd@omniti.com>
The metaslab_fragmentation() hunk was dropped from this patch
because it was already resolved by commit 8b0a084.
The comment modified in metaslab.c was updated to use the correct
variable name, space_map_blksz. The upstream commit incorrectly
used space_map_blksize.
Alex Reece [Mon, 22 Sep 2014 23:42:03 +0000 (01:42 +0200)]
Illumos 4958 zdb trips assert on pools with ashift >= 0xe
4958 zdb trips assert on pools with ashift >= 0xe
Reviewed by: Matthew Ahrens <mahrens@delphix.com>
Reviewed by: Max Grossman <max.grossman@delphix.com>
Reviewed by: George Wilson <george.wilson@delphix.com>
Reviewed by: Christopher Siden <christopher.siden@delphix.com>
Approved by: Garrett D'Amore <garrett@damore.org>
Brian Behlendorf [Thu, 23 Oct 2014 22:26:49 +0000 (15:26 -0700)]
Fix zdb segfault
On 32-bit systems setting 'zfs_arc_max = 256M' in zdb results in the
following segmentation fault. Rather than reverting 0ec0724 which
introduced this flaw this code is only used for 64-bit builds.
Matthew Ahrens [Tue, 16 Sep 2014 20:24:48 +0000 (22:24 +0200)]
Illumos 5169-5171 - zdb fixes
5169 zdb should limit its ARC size
5170 zdb -c should create more scrub i/os by default
5171 zdb should print status while loading metaslabs for leak detection
Reviewed by: Christopher Siden <christopher.siden@delphix.com>
Reviewed by: George Wilson <george.wilson@delphix.com>
Reviewed by: Paul Dagnelie <paul.dagnelie@delphix.com>
Reviewed by: Bayard Bell <Bayard.Bell@nexenta.com>
Approved by: Robert Mustacchi <rm@joyent.com>
Matthew Ahrens [Wed, 17 Sep 2014 07:14:39 +0000 (09:14 +0200)]
Illumos 5178 - zdb -vvvvv on old-format pool fails in dump_deadlist()
5178 zdb -vvvvv on old-format pool fails in dump_deadlist()
Reviewed by: Christopher Siden <christopher.siden@delphix.com>
Reviewed by: George Wilson <george.wilson@delphix.com>
Reviewed by: Richard Lowe <richlowe@richlowe.net>
Reviewed by: Saso Kiselkov <skiselkov.ml@gmail.com>
Reviewed by: Richard Elling <richard.elling@gmail.com>
Reviewed by: Alek Pinchuk <alek.pinchuk@nexenta.com>
Approved by: Garrett D'Amore <garrett@damore.org>
ilovezfs [Sat, 4 Oct 2014 05:20:43 +0000 (22:20 -0700)]
Fix zpool create -t ENOENT bug.
In userland we need to switch over to the temporary name once the
pool has been created, otherwise the root dataset won't mount
and the error "cannot open 'the_real_name': dataset does not exist"
is printed.
Signed-off-by: ilovezfs <ilovezfs@icloud.com> Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Closes #2760
Brian Behlendorf [Wed, 10 Sep 2014 18:59:03 +0000 (11:59 -0700)]
Handle block pointers with a corrupt logical size
The general strategy used by ZFS to verify that blocks are valid is
to checksum everything. This has the advantage of being extremely
robust and generically applicable regardless of the contents of
the block. If a blocks checksum is valid then its contents are
trusted by the higher layers.
This system works exceptionally well as long as bad data is never
written with a valid checksum. If this does somehow occur due to
a software bug or a memory bit-flip on a non-ECC system it may
result in kernel panic.
One such place where this could occur is if somehow the logical
size stored in a block pointer exceeds the maximum block size.
This will result in an attempt to allocate a buffer greater than
the maximum block size causing a system panic.
To prevent this from happening the arc_read() function has been
updated to detect this specific case. If a block pointer with an
invalid logical size is passed it will treat the block as if it
contained a checksum error.
Signed-off-by: Tim Chase <tim@chase2k.com> Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Closes #2678
Ned Bass [Thu, 16 Oct 2014 20:52:56 +0000 (13:52 -0700)]
Remove checks for mandatory locks
The Linux VFS handles mandatory locks generically so we shouldn't
need to check for conflicting locks in zfs_read(), zfs_write(), or
zfs_freesp(). Linux 3.18 removed the lock_may_read() and
lock_may_write() interfaces which we were relying on for this
purpose. Rather than emulating those interfaces we remove the
redundant checks.
Signed-off-by: Ned Bass <bass6@llnl.gov> Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Closes #2804
Matthew Ahrens [Sat, 13 Sep 2014 14:02:18 +0000 (16:02 +0200)]
Illumos 5162 - zfs recv should use loaned arc buffer to avoid copy
5162 zfs recv should use loaned arc buffer to avoid copy
Reviewed by: Christopher Siden <christopher.siden@delphix.com>
Reviewed by: George Wilson <george.wilson@delphix.com>
Reviewed by: Bayard Bell <Bayard.Bell@nexenta.com>
Reviewed by: Richard Elling <richard.elling@gmail.com>
Approved by: Garrett D'Amore <garrett@damore.org>
Matthew Ahrens [Fri, 12 Sep 2014 03:45:50 +0000 (05:45 +0200)]
Illumos 5150 - zfs clone of a defer_destroy snapshot causes strangeness
When a clone is created of a snapshot that has been marked for
deferred destroy (with "zfs destroy -d"), the clone "inherits" the
defer_destroy flag from the origin, and any snapshots of the clone
"inherit" the defer_destroy flag from the clone. This causes a strange
situation where the clone's snapshots are marked for defer_destroy but
they have no holds or clones. If the clone's snapshot gets a hold or
clone, which is then deleted, we will honor the incorrectly-set
defer_destroy flag and delete the snapshot!
Steps to reproduce:
* zpool create test c1t1d0
* zfs create test/fs
* zfs snapshot test/fs@a
* zfs clone test/fs@a test/clone
* zfs destroy -d test/fs@a
* zfs clone test/fs@a test/clone2
* zfs snapshot test/clone2@a
* zfs hold hld test/clone2@a
* zfs release hld test/clone2@a
* zfs list -r -t all test
<test/clone2@a has been destroyed>
We noticed that this causes dcenter to get very confused, because it
treats snapshots that are marked defer_destroy as not existing. So it
won't see any snapshots of the clone that's marked defer_destroy.
5150 - zfs clone of a defer_destroy snapshot causes strangeness
Reviewed by: Christopher Siden <christopher.siden@delphix.com>
Reviewed by: George Wilson <george.wilson@delphix.com>
Reviewed by: Max Grossman <max.grossman@delphix.com>
Reviewed by: Saso Kiselkov <skiselkov.ml@gmail.com>
Reviewed by: Richard Elling <richard.elling@gmail.com>
Approved by: Robert Mustacchi <rm@joyent.com>
Matthew Ahrens [Fri, 12 Sep 2014 03:28:35 +0000 (05:28 +0200)]
Illumos 3693 - restore_object uses at least two transactions to restore an object
Restore_object should not use two transactions to restore an object:
* one transaction is used for dmu_object_claim
* another transaction is used to set compression, checksum and most
importantly bonus data
* furthermore dmu_object_reclaim internally uses multiple transactions
* dmu_free_long_range frees chunks in separate transactions
* dnode_reallocate is executed in a distinct transaction
The fact the dnode_allocate/dnode_reallocate are executed in one
transaction and bonus (re-)population is executed in a different
transaction may lead to violation of ZFS consistency assertions if the
transactions are assigned to different transaction groups. Also, if
the first transaction group is successfully written to a permanent
storage, but the second transaction is lost, then an invalid dnode may
be created on the stable storage.
3693 restore_object uses at least two transactions to restore an object
Reviewed by: Christopher Siden <christopher.siden@delphix.com>
Reviewed by: George Wilson <george.wilson@delphix.com>
Reviewed by: Andriy Gapon <andriy.gapon@hybridcluster.com>
Approved by: Robert Mustacchi <rm@joyent.com>
Original authors: Matthew Ahrens and Andriy Gapon
Tim Chase [Tue, 7 Oct 2014 13:01:01 +0000 (08:01 -0500)]
Don't perform ACL-to-mode translation on empty ACL
In zfs_acl_chown_setattr(), the zfs_mode_comput() function is used to
create a traditional mode value based on an ACL. If no ACL exists, this
processing shouldn't be done. Problems caused by this were most evident
on version 4 filesystems which not only don't have system attributes,
and also frequently have empty ACLs. On such filesystems, performing a
chown() operation could have the effect of dirtying the mode bits in
memory but not on the file system as follows:
# create a file with typical mode of 664
echo test > test
chown anyuser test
ls -l test
and the mode will show up as all zeroes. Unmounting/mounting and/or
exporting/importing the filesystem will reveal the proper mode again.
Signed-off-by: Tim Chase <tim@chase2k.com> Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Closes #1264
Daniil Lunev [Sat, 18 Oct 2014 15:58:11 +0000 (11:58 -0400)]
Illumos 4924 - LZ4 Compression for metadata
Reviewed by Matthew Ahrens <mahrens@delphix.com>
Reviewed by Saso Kiselkov <skiselkov.ml@gmail.com>
Approved by: Christopher Siden <christopher.siden@delphix.com>
The static function zfs_prop_activate_feature() was removed because
this change removes the only caller. The function was not removed
from Illumos but instead left as dead code. However, to keep gcc
happy it was removed from Linux and may be easily restored if needed.
Ported by: DHE <git@dehacked.net> Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Closes #1540
The new zpl_aio_write() and zpl_aio_read() functions use kmem_alloc()
to allocate enough memory to hold the vectorized IO. While this
allocation will be small it's been observed in practice to sometimes
slightly exceed the 8K warning threshold by a few kilobytes.
Therefore, the KM_NODEBUG flag has been added to suppress warning.
Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov> Signed-off-by: Richard Yao <ryao@gentoo.org>
Closes #2774
Darik Horn [Mon, 13 Oct 2014 03:57:49 +0000 (22:57 -0500)]
Let `zpool import` ignore a missing hostid record.
Change the zpool program to skip its hostid mismatch check in the
same way that libzfs already does.
Invoked imports fail if the ZPOOL_CONFIG_HOSTID nvpair is missing in
the /etc/zfs/zpool.cache file, which can happen as of the /etc/hostid
deprecation in commit zfsonlinux/spl@acf0ade362cb8b26d67770114ee6fa17816e6b65.
Signed-off-by: Darik Horn <dajhorn@vanadac.com> Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Closes #2794
Brian Behlendorf [Sat, 11 Oct 2014 01:12:47 +0000 (18:12 -0700)]
Handle NULL mirror child vdev
When selecting a mirror child it's possible that map allocated by
vdev_mirror_map_allc() contains a NULL for the child vdev. In
this case the child should be skipped and the read issues to
another member of the mirror.
Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov> Signed-off-by: Ned Bass <bass6@llnl.gov>
Closes #1744
Modify the code to use the utsname() kernel function rather than
a global variable. This results is cleaner more portable code
because utsname() is already provided by the kernel and can be
easily emulated in user space via uname(2). This means that it
will behave consistently in both contexts.
This is also has the benefit that it allows the removal of a few
_KERNEL pre-processor conditions. And it also is a pre-requisite
for a proper FUSE port because we need to provide a valid utsname.
Finally, it allows us to remove this functionality from the SPL
and all the related compatibility code.
Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Issue #2757
Remove shrink_dcache_memory() and shrink_icache_memory()
This functionality is optional and until Linux 3.0, which
provided per-filesystem shinkers, they was never a reasonable
interface. Therefore, this functionality is being dropped
for earlier kernels.
Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Issue #2757
Brian Behlendorf [Tue, 30 Sep 2014 23:24:04 +0000 (19:24 -0400)]
Update code to use misc_register()/misc_deregister()
When ZPIOS was originally written it was designed to use the
device_create() and device_destroy() functions. Unfortunately,
these functions changed considerably over the years making them
difficult to rely on.
As it turns out a better choice would have been to use the
misc_register()/misc_deregister() functions. This interface
for registering character devices has remained stable, is simple,
and provides everything we need.
Therefore the code has been reworked to use this interface. The
higher level ZFS code has always depended on these same interfaces
so this is also as a step towards minimizing our kernel dependencies.
Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Issue #2757
Brian Behlendorf [Mon, 13 Oct 2014 17:35:01 +0000 (10:35 -0700)]
Fix source_tree variable in dkms build
The source_tree variable in the previous commit had an extra $.
Remove it so that source_tree is expanded properly. An identical
fix has been applied in the original patch to the stable branch.
Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Closes #2776
Tom Prince [Thu, 9 Oct 2014 17:24:03 +0000 (14:24 -0300)]
Point dkms build at installed source tree, rather than build directory.
Signed-off-by: Tom Prince <tom.prince@clusterhq.com> Signed-off-by: Richard Yao <ryao@gentoo.org> Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Closes #2776
Tom Prince [Thu, 9 Oct 2014 17:22:59 +0000 (14:22 -0300)]
Install header during post-build rather than post-install.
New versions of dkms clean up the build directory after installing.
It appears that this was always intended, but had rm -rf "/path/to/build/*"
(note the quotes), which prevented it from working.
Also, the build step is already installing stuff into the directory where
these files go, so installing our stuff there as part of build rather than
install makes sense.
Signed-off-by: Tom Prince <tom.prince@clusterhq.com> Signed-off-by: Richard Yao <ryao@gentoo.org> Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Closes #2776
Commit e022864 introduced a regression for kernels which are built
with CONFIG_DEBUG_PREEMPT. The use of CPU_SEQID in a preemptible
context causes zio_nowait() to trigger the BUG. Since CPU_SEQID
is simply being used as a random index the usage here is safe. To
resolve the issue preempt is disable while calling CPU_SEQID.
Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov> Signed-off-by: Ned Bass <bass6@llnl.gov>
Closes #2769
Matthew Ahrens [Wed, 17 Sep 2014 06:59:43 +0000 (08:59 +0200)]
Illumos 5176 - lock contention on godfather zio
5176 lock contention on godfather zio
Reviewed by: Adam Leventhal <ahl@delphix.com>
Reviewed by: Alex Reece <alex.reece@delphix.com>
Reviewed by: Christopher Siden <christopher.siden@delphix.com>
Reviewed by: George Wilson <george.wilson@delphix.com>
Reviewed by: Richard Elling <richard.elling@gmail.com>
Reviewed by: Bayard Bell <Bayard.Bell@nexenta.com>
Approved by: Garrett D'Amore <garrett@damore.org>
Under Linux max_ncpus is defined as num_possible_cpus(). This is
largest number of cpu ids which might be available during the life
time of the system boot. This value can be larger than the number
of present cpus if CONFIG_HOTPLUG_CPU is defined.
Lukas Wunner [Mon, 6 Oct 2014 11:08:33 +0000 (13:08 +0200)]
Amend Dracut module to export ZFS root on shutdown
Make use of Dracut's ability to restore the initramfs on shutdown and
pivot to it, allowing for a clean unmount and export of the ZFS root.
No need to force-import on every reboot anymore.
Chris Dunlap [Wed, 1 Oct 2014 21:56:07 +0000 (14:56 -0700)]
Obtain advisory lock on ZED PID file
ZED uses an advisory lock on its state file to protect against
multiple instances running concurrently. However, work is planned
to move this state information into the kernel, and ZED will still
need to protect against starting multiple instances.
This commit adds an advisory lock on the PID file to protect against
starting multiple instances. A lock failure can be overridden with
the "-f" (force) command-line option. The advisory lock on the state
file is being retained for as long as the state information is stored
in the state file.
Signed-off-by: Chris Dunlap <cdunlap@llnl.gov> Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Issue #2756
Andriy Gapon [Thu, 15 May 2014 08:42:19 +0000 (11:42 +0300)]
zfs send -p send properties only for snapshots that are actually sent
... as opposed to sending properties of all snapshots of the relevant
filesystem. The previous behavior results in properties being set on
all snapshots on the receiving side, which is quite slow.
Richard Yao [Fri, 20 Jun 2014 23:00:11 +0000 (19:00 -0400)]
Implement -t option to zpool create for temporary pool names
Creating virtual machines that have their rootfs on ZFS on hosts that
have their rootfs on ZFS causes SPA namespace collisions when the
standard name rpool is used. The solution is either to give each guest
pool a name unique to the host, which is not always desireable, or boot
a VM environment containing an ISO image to install it, which is
cumbersome.
26b42f3f9d03f85cc7966dc2fe4dfe9216601b0e introduced `zpool import -t
...` to simplify situations where a host must access a guest's pool when
there is a SPA namespace conflict. We build upon that to introduce
`zpool import -t tname ...`. That allows us to create a pool whose
in-core name is tname, but whose on-disk name is the normal name
specified.
This simplifies the creation of machine images that use a rootfs on ZFS.
That benefits not only real world deployments, but also ZFSOnLinux
development by decreasing the time needed to perform rootfs on ZFS
experiments.
Signed-off-by: Richard Yao <ryao@gentoo.org> Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Issue #2417
Richard Yao [Mon, 23 Jun 2014 18:26:47 +0000 (14:26 -0400)]
zpool import -t should not update cachefile
zpool import's -t parameter is intended for use with -R when operating
on pools that belong to other systems. Like -R, pools imported in this
way should not update the cachefile unless explicitly requested. The
initial implementation allowed the cachefile to be updated when -R was
not used. This went uncaught during testing because -R had implicitly
disabled use of the cachefile.
Signed-off-by: Richard Yao <ryao@gentoo.org> Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Issue #2417
Richard Yao [Mon, 23 Jun 2014 18:12:53 +0000 (14:12 -0400)]
Add add_prop_list_default helper
Adding to a property list only if there is no existing value is used
twice. Once by zpool create -R and again by zpool import -R. Now that
zpool create -t and zpool import -t also need it, lets refactor it into
a helper function to make the code more readable.
Signed-off-by: Richard Yao <ryao@gentoo.org> Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Issue #2417
Brian Behlendorf [Thu, 25 Sep 2014 22:15:45 +0000 (15:15 -0700)]
Make user stack limit configurable
To aid in detecting and debugging stack overflow issues make the
user space stack limit configurable via a new ZFS_STACK_SIZE
environment variable. The value assigned to ZFS_STACK_SIZE will
be used as the default stack size in bytes.
Because this is mainly useful as a debugging aid in conjunction
with ztest the stack limit is disabled by default. See the ztest(1)
man page for additional details on using the ZFS_STACK_SIZE
environment variable.
Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov> Signed-off-by: Ned Bass <bass6@llnl.gov>
Closes #2743
Issue #2293
Tim Chase [Fri, 26 Sep 2014 04:40:41 +0000 (23:40 -0500)]
Perform whole-page page truncation for hole-punching under a range lock
As an attempt to perform the page truncation more optimally, the
hole-punching support added in 223df0161fad50f53a8fa5ffeea8cc4f8137d522
truncated performed the operation in two steps: first, sub-page "stubs"
were zeroed under the range lock in zfs_free_range() using the new
zfs_zero_partial_page() function and then the whole pages were truncated
within zfs_freesp(). This left a window of opportunity during which
the full pages could be touched.
This patch closes the window by moving the whole-page truncation into
zfs_free_range() under the range lock.
Signed-off-by: Tim Chase <tim@chase2k.com> Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Closes #2733
Chris Dunlap [Fri, 19 Sep 2014 18:10:28 +0000 (11:10 -0700)]
Refer to ZED's scripts as ZEDLETs
The executables invoked by the ZED in response to a given zevent
have been generically referred to as "scripts". By convention,
these scripts have aimed to be /bin/sh compatible for reasons of
portability and comprehensibility. However, the ZED only requires
they be executable and (ideally) capable of reading environment
variables. As such, these scripts are now referred to as ZEDLETs
(ZFS Event Daemon Linkage for Executable Tasks).
Signed-off-by: Chris Dunlap <cdunlap@llnl.gov> Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Closes #2735
Chris Dunlap [Mon, 22 Sep 2014 20:22:48 +0000 (13:22 -0700)]
Replace zed's use of malloc with calloc
When zed allocates memory via malloc(), it typically follows that
with a memset(). However, calloc() implementations can often perform
optimizations when zeroing memory:
Chris Dunlap [Thu, 11 Sep 2014 22:41:35 +0000 (15:41 -0700)]
Fix zed io-spare.sh dash incompatibility
The zed's io-spare.sh script defines a vdev_status() function to query
the 'zpool status' output for obtaining the status of a specified vdev.
This function contains a small awk script that uses a parameter
expansion (${parameter/pattern/string}) supported in bash but not
in dash. Under dash, this fails with a "Bad substitution" error.
This commit replaces the awk script with a (hopefully more portable)
sed script that has been tested under both bash and dash.
Signed-off-by: Chris Dunlap <cdunlap@llnl.gov> Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Closes #2536
Because support for exposing a uint64_t parameter wasn't added
until v3.17-rc1 the zfs_free_max_blocks variable has been declared
as a unsigned long. This is already far larger than required and
it allows us to avoid additional autoconf compatibility code.
The default value has been set to 100,000 on Linux instead of
ULONG_MAX which is used on Illumos. This was done to limit the
number of outstanding IOs in the system when snapshots are destroyed.
This helps ensure individual TXG sync times are kept reasonable and
memory isn't wasted managing a huge backlog of outstanding IOs.
Alex Reece [Fri, 18 Jul 2014 15:08:31 +0000 (07:08 -0800)]
Illumos 4753 - increase number of outstanding async writes when sync task is waiting
Reviewed by: Matthew Ahrens <mahrens@delphix.com>
Reviewed by: George Wilson <george.wilson@delphix.com>
Reviewed by: Adam Leventhal <ahl@delphix.com>
Reviewed by: Christopher Siden <christopher.siden@delphix.com>
Reviewed by: Dan McDonald <danmcd@omniti.com>
Approved by: Garrett D'Amore <garrett@damore.org>
Comments by Matt Ahrens from the issue tracker:
When a sync task is waiting for a txg to complete, we should hurry
it along by increasing the number of outstanding async writes
(i.e. make vdev_queue_max_async_writes() return a larger number).
Initially we might just have a tunable for "minimum async writes
while a synctask is waiting" and set it to 3.
Ported-by: Tim Chase <tim@chase2k.com> Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Closes #2716
Matthew Ahrens [Wed, 17 Sep 2014 15:41:51 +0000 (17:41 +0200)]
Illumos 5116 - zpool history -i goes into infinite loop
5116 zpool history -i goes into infinite loop
Reviewed by: Christopher Siden <christopher.siden@delphix.com>
Reviewed by: Dan Kimmel <dan.kimmel@delphix.com>
Reviewed by: George Wilson <george.wilson@delphix.com>
Reviewed by: Richard Elling <richard.elling@gmail.com>
Reviewed by: Boris Protopopov <boris.protopopov@me.com>
Approved by: Dan McDonald <danmcd@omniti.com>
Matthew Ahrens [Fri, 12 Sep 2014 16:26:53 +0000 (18:26 +0200)]
Illumos 5135 - zpool_find_import_cached() can use fnvlist_*
Reviewed by: Christopher Siden <christopher.siden@delphix.com>
Reviewed by: Max Grossman <max.grossman@delphix.com>
Reviewed by: Richard Elling <richard.elling@gmail.com>
Approved by: Dan McDonald <danmcd@omniti.com>
Matthew Ahrens [Wed, 17 Sep 2014 15:25:10 +0000 (17:25 +0200)]
Illumos 5139 - SEEK_HOLE failed to report a hole at end of file
5139 SEEK_HOLE failed to report a hole at end of file
Reviewed by: Adam Leventhal <adam.leventhal@delphix.com>
Reviewed by: Alex Reece <alex.reece@delphix.com>
Reviewed by: Christopher Siden <christopher.siden@delphix.com>
Reviewed by: George Wilson <george.wilson@delphix.com>
Reviewed by: Max Grossman <max.grossman@delphix.com>
Reviewed by: Peng Dai <peng.dai@delphix.com>
Reviewed by: Richard Elling <richard.elling@gmail.com>
Approved by: Dan McDonald <danmcd@omniti.com>
Richard Yao [Wed, 23 Apr 2014 03:18:17 +0000 (23:18 -0400)]
Fix function call with uninitialized value in vdev_inuse
LLVM's static analyzer reported that we could pass an uninitialized
pool_guid to spa_by_guid() in vdev_inuse(). Upon review, it is correct.
An attempt to repurpose a spare or L2ARC drive from an exported pool
will cause the pool_guid passed to spa_by_guid() to be unintialized
information from the stack. This will cause non-deterministic behavior.
Since there is no reason why we cannot repurpose such disks, we modify
vdev_inuse() to avoid calling spa_by_guid() when they are detected.
Signed-off-by: Richard Yao <ryao@gentoo.org> Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Issue #2330
George Wilson [Fri, 12 Sep 2014 03:07:20 +0000 (05:07 +0200)]
Illumos 5147 - zpool list -v should show individual disk capacity
The 'zpool list -v' command displays lots of info but excludes the
capacity of each disk. This should be added.
5147 zpool list -v should show individual disk capacity
Reviewed by: Adam Leventhal <adam.leventhal@delphix.com>
Reviewed by: Christopher Siden <christopher.siden@delphix.com>
Reviewed by: Matthew Ahrens <matthew.ahrens@delphix.com>
Reviewed by: Richard Elling <richard.elling@gmail.com>
Approved by: Dan McDonald <danmcd@omniti.com>
Matthew Ahrens [Sat, 13 Sep 2014 14:13:00 +0000 (16:13 +0200)]
Illumos 5161 - add tunable for number of metaslabs per vdev
5161 add tunable for number of metaslabs per vdev
Reviewed by: Alex Reece <alex.reece@delphix.com>
Reviewed by: Christopher Siden <christopher.siden@delphix.com>
Reviewed by: George Wilson <george.wilson@delphix.com>
Reviewed by: Paul Dagnelie <paul.dagnelie@delphix.com>
Reviewed by: Saso Kiselkov <skiselkov.ml@gmail.com>
Reviewed by: Richard Elling <richard.elling@gmail.com>
Approved by: Richard Lowe <richlowe@richlowe.net>
Matthew Ahrens [Wed, 17 Sep 2014 07:07:28 +0000 (09:07 +0200)]
Illumos 5177 - remove dead code from dsl_scan.c
5177 remove dead code from dsl_scan.c
Reviewed by: Christopher Siden <christopher.siden@delphix.com>
Reviewed by: George Wilson <george.wilson@delphix.com>
Reviewed by: Richard Elling <richard.elling@gmail.com>
Reviewed by: Richard Lowe <richlowe@richlowe.net>
Approved by: Robert Mustacchi <rm@joyent.com>
Ned Bass [Fri, 19 Sep 2014 18:42:13 +0000 (11:42 -0700)]
Remove obsolete comment about guard pages
Remove an obsolete comment that refers to code removed by commit 79c6e4c4. The code and comment related to space consumed by guard
pages in user-space stacks, which we no longer take into account.
Signed-off-by: Ned Bass <bass6@llnl.gov> Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Closes #2722
Matthew Ahrens [Sun, 7 Sep 2014 15:37:25 +0000 (17:37 +0200)]
Illumos 5140 - message about "%recv could not be opened" is printed when booting after crash
Reviewed by: Christopher Siden <christopher.siden@delphix.com>
Reviewed by: George Wilson <george.wilson@delphix.com>
Reviewed by: Max Grossman <max.grossman@delphix.com>
Reviewed by: Richard Elling <richard.elling@gmail.com>
Approved by: Dan McDonald <danmcd@omniti.com>
When rolling back a mounted filesystem zfs_suspend() is called
which acquires the z_teardown_inactive_lock. This lock can not
be dropped until the filesystem has been rolled back and resumed
in zfs_resume_fs().
Therefore, we must not call iput() under this lock because it
may result in the inode->evict() handler being called which also
takes this lock. Instead use zfs_iput_async() to ensure dropping
the last reference is deferred and runs in a safe context.
Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Closes #2670
Tim Chase [Wed, 20 Aug 2014 22:35:13 +0000 (17:35 -0500)]
Implement fallocate FALLOC_FL_PUNCH_HOLE
Add support for the FALLOC_FL_PUNCH_HOLE | FALLOC_FL_KEEP_SIZE mode of
fallocate(2). Mimic the behavior of other native file systems such as
ext4 in cases where the file might be extended. If the offset is beyond
the end of the file, return success without changing the file. If the
extent of the punched hole would extend the file, only the existing tail
of the file is punched.
Add the zfs_zero_partial_page() function, modeled after update_page(),
to handle zeroing partial pages in a hole-punching operation. It must
be used under a range lock for the requested region in order that the
ARC and page cache stay in sync.
Move the existing page cache truncation via truncate_setsize() into
zfs_freesp() for better source structure compatibility with upstream code.
Add page cache truncation to zfs_freesp() and zfs_free_range() to handle
hole punching.
Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov> Signed-off-by: Tim Chase <tim@chase2k.com>
Closes #2619
George Wilson [Fri, 5 Sep 2014 00:50:36 +0000 (02:50 +0200)]
Illumos 5117 - spacemap reallocation can cause corruption
5117 space map reallocation can cause corruption
Reviewed by: Matthew Ahrens <mahrens@delphix.com>
Reviewed by: Sebastien Roy <sebastien.roy@delphix.com>
Reviewed by: Richard Elling <richard.elling@gmail.com>
Approved by: Richard Lowe <richlowe@richlowe.net>
Brian Behlendorf [Fri, 29 Aug 2014 19:24:26 +0000 (12:24 -0700)]
Add object type checking to zap_lockdir()
If a non-ZAP object is passed to zap_lockdir() it will be treated
as a valid ZAP object. This can result in zap_lockdir() attempting
to read what it believes are leaf blocks from invalid disk locations.
The SCSI layer will eventually generate errors for these bogus IOs
but the caller will hang in zap_get_leaf_byblk().
The good news is that is a situation which can not occur unless the
pool has been damaged. The bad news is that there are reports from
both FreeBSD and Solaris of damaged pools. Specifically, there are
normal files in the filesystem which reference another normal file
as their parent.
Since pools like this are known to exist the zap_lockdir() function
has been updated to verify the type of the object. If a non-ZAP
object has been passed it EINVAL will be returned immediately.
Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Issue #2597
Issue #2602
Richard Yao [Mon, 4 Aug 2014 11:09:32 +0000 (07:09 -0400)]
Linux AIO Support
nfsd uses do_readv_writev() to implement fops->read and fops->write.
do_readv_writev() will attempt to read/write using fops->aio_read and
fops->aio_write, but it will fallback to fops->read and fops->write when
AIO is not available. However, the fallback will perform a call for each
individual data page. Since our default recordsize is 128KB, sequential
operations on NFS will generate 32 DMU transactions where only 1
transaction was needed. That was unnecessary overhead and we implement
fops->aio_read and fops->aio_write to eliminate it.
ZFS originated in OpenSolaris, where the AIO API is entirely implemented
in userland's libc by intelligently mapping them to VOP_WRITE, VOP_READ
and VOP_FSYNC. Linux implements AIO inside the kernel itself. Linux
filesystems therefore must implement their own AIO logic and nearly all
of them implement fops->aio_write synchronously. Consequently, they do
not implement aio_fsync(). However, since the ZPL works by mapping
Linux's VFS calls to the functions implementing Illumos' VFS operations,
we instead implement AIO in the kernel by mapping the operations to the
VOP_READ, VOP_WRITE and VOP_FSYNC equivalents. We therefore implement
fops->aio_fsync.
One might be inclined to make our fops->aio_write implementation
synchronous to make software that expects this behavior safe. However,
there are several reasons not to do this:
1. Other platforms do not implement aio_write() synchronously and since
the majority of userland software using AIO should be cross platform,
expectations of synchronous behavior should not be a problem.
2. We would hurt the performance of programs that use POSIX interfaces
properly while simultaneously encouraging the creation of more
non-compliant software.
3. The broader community concluded that userland software should be
patched to properly use POSIX interfaces instead of implementing hacks
in filesystems to cater to broken software. This concept is best
described as the O_PONIES debate.
4. Making an asynchronous write synchronous is non sequitur.
Any software dependent on synchronous aio_write behavior will suffer
data loss on ZFSOnLinux in a kernel panic / system failure of at most
zfs_txg_timeout seconds, which by default is 5 seconds. This seems like
a reasonable consequence of using non-compliant software.
It should be noted that this is also a problem in the kernel itself
where nfsd does not pass O_SYNC on files opened with it and instead
relies on a open()/write()/close() to enforce synchronous behavior when
the flush is only guarenteed on last close.
Exporting any filesystem that does not implement AIO via NFS risks data
loss in the event of a kernel panic / system failure when something else
is also accessing the file. Exporting any file system that implements
AIO the way this patch does bears similar risk. However, it seems
reasonable to forgo crippling our AIO implementation in favor of
developing patches to fix this problem in Linux's nfsd for the reasons
stated earlier. In the interim, the risk will remain. Failing to
implement AIO will not change the problem that nfsd created, so there is
no reason for nfsd's mistake to block our implementation of AIO.
It also should be noted that `aio_cancel()` will always return
`AIO_NOTCANCELED` under this implementation. It is possible to implement
aio_cancel by deferring work to taskqs and use `kiocb_set_cancel_fn()`
to set a callback function for cancelling work sent to taskqs, but the
simpler approach is allowed by the specification:
```
Which operations are cancelable is implementation-defined.
```
The only programs on my system that are capable of using `aio_cancel()`
are QEMU, beecrypt and fio use it according to a recursive grep of my
system's `/usr/src/debug`. That suggests that `aio_cancel()` users are
rare. Implementing aio_cancel() is left to a future date when it is
clear that there are consumers that benefit from its implementation to
justify the work.
Lastly, it is important to know that handling of the iovec updates differs
between Illumos and Linux in the implementation of read/write. On Linux,
it is the VFS' responsibility whle on Illumos, it is the filesystem's
responsibility. We take the intermediate solution of copying the iovec
so that the ZFS code can update it like on Solaris while leaving the
originals alone. This imposes some overhead. We could always revisit
this should profiling show that the allocations are a problem.
Signed-off-by: Richard Yao <ryao@gentoo.org> Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Closes #223
Closes #2373
Fragmentation should display as '-' if spacemap_histogram=disabled
When com.delphix:spacemap_histogram is disabled, the value of
fragmentation was printing as 18446744073709551615 (UINT64_MAX),
when it should print as '-'.
The issue was caused by a small mistake during the merge of
"4980 metaslabs should have a fragmentation metric."
The problem is in zpool_get_prop_literal, where the handling of the
pool property ZPOOL_PROP_FRAGMENTATION was added to wrong the
section. In particular, ZPOOL_PROP_FRAGMENTATION should not be in
the section where zpool_get_state(zhp) == POOL_STATE_UNAVAIL, but
lower down after it's already been determined that the pool is in
fact available, which is where upstream illumos correctly has had
it.
Thanks to lundman for helping to track down this bug.
Signed-off-by: Jorgen Lundman <lundman@lundman.net> Signed-off-by: Tim Chase <tim@chase2k.com> Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Closes #2664
This commit should prevent a deadlock on dp_config_rwlock when
running `zfs rename` by ensuring zvol_rename_minors() is not
called under this lock.
Signed-off-by: Stanislav Seletskiy <s.seletskiy@gmail.com> Signed-off-by: Richard Yao <ryao@gentoo.org> Signed-off-by: Tim Chase <tim@chase2k.com> Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Closes #2652.
Closes #2525.
Change mount code to diagnose filesystem versions that
are not supported by the current implementation.
Change upgrade code to do likewise and refuse to upgrade
a pool if any filesystems on it are a version which is
not supported by the current implementation.
Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov> Signed-off-by: Dan Swartzendruber <dswartz@druber.com> Closes: #2616
louwrentius [Fri, 29 Aug 2014 22:14:20 +0000 (00:14 +0200)]
Change delimiter for ZED email scripts
When the ZED_EMAIL_INTERVAL_SECS="3600" option is set in zed.rc
configuration file then notification emails should be rate limited.
Rate limiting is accomplished by maintaining a colon delimited state
file which includes the device name. Unfortunately there are valid
device names which include a colon and therefore prevent the rate
limiting for working properly. For this reason the delimiter has
been changed to a semi-colon.
Signed-off-by: louwrentius <louwrentius@gmail.com> Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov> Signed-off-by: Chris Dunlap <cdunlap@llnl.gov>
Closes #2645
Change the startup mode of ZED to non-forking. While systemd can
track processes that detach from the terminal just fine, running
processes in non-forking mode is the preferred mode of operation.
Also remove user/group definitions as root/root is the default.
Signed-off-by: Chris Dunlap <cdunlap@llnl.gov> Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Closes #2252
Chris Dunlap [Thu, 28 Aug 2014 21:39:48 +0000 (14:39 -0700)]
Cleanup zed logging
This is a set of minor cleanup changes related to zed logging:
- Remove the program identity prefix from messages written to stderr
since systemd already prepends this output with the program name.
- Replace the copy of the program identity string with a ptr reference.
- Replace "pid" with "PID" for consistency in comments & strings.
- Rename the zed_log.c struct _ctx component "level" to "priority".
- Add the LOG_PID option for messages written to syslog.
Signed-off-by: Chris Dunlap <cdunlap@llnl.gov> Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Issue #2252
Chris Dunlap [Wed, 27 Aug 2014 20:18:01 +0000 (13:18 -0700)]
Fix race condition with zed pidfile creation
When the zed is started as a forking daemon (by default),
a race-condition exists where the parent process can terminate before
the pidfile has been created by the grandchild process. When invoked
as a Type=forking systemd service, this can result in the following:
systemd[1]: Starting ZFS Event Daemon (zed)...
systemd[1]: PID file /var/run/zed.pid not readable (yet?) after start.
This commit adds a daemonize pipe to allow the grandchild process to
signal the parent process that initialization is complete (and the
pidfile has been created). The parent process will wait for this
notification before exiting.
Signed-off-by: Chris Dunlap <cdunlap@llnl.gov> Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Issue #2252
Providing a pkg-config file makes is easy for 3rd party applications
to link against the libzfs libraries. It also allows the libzfs
developers to modify the list of required libraries and cflags
without breaking existing applications.
The following example illustrates how pkg-config can be used:
cc `pkg-config --cflags --libs libzfs` -o myapp myapp.c
Brian Behlendorf [Wed, 27 Aug 2014 21:12:18 +0000 (14:12 -0700)]
Retire HAVE_IOCTL_* configure checks
The HAVE_IOCTL_* configure checks were originally added for
compatibility with an ancient version of glibc. This support
and additional complexity is no longer needed and is therefore
being removed.
Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov> Signed-off-by: Turbo Fredriksson <turbo@bayour.com>
Closes #585
Matthew Ahrens [Tue, 15 Jul 2014 18:58:41 +0000 (10:58 -0800)]
Illumos 4970-4974 - extreme rewind enhancements
4970 need controls on i/o issued by zpool import -XF
4971 zpool import -T should accept hex values
4972 zpool import -T implies extreme rewind, and thus a scrub
4973 spa_load_retry retries the same txg
4974 spa_load_verify() reads all data twice
Reviewed by: Christopher Siden <christopher.siden@delphix.com>
Reviewed by: Dan McDonald <danmcd@omniti.com>
Reviewed by: George Wilson <george.wilson@delphix.com>
Approved by: Robert Mustacchi <rm@joyent.com>
Notes:
This set of patches adds a set of tunable parameters for the
"extreme rewind" mode of pool import which allows control over
the traversal performed during such an import.
Ported by: Tim Chase <tim@chase2k.com> Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Closes #2598
Matthew Ahrens [Wed, 20 Aug 2014 17:09:40 +0000 (10:09 -0700)]
Illumos 5034 - ARC's buf_hash_table is too small
5034 ARC's buf_hash_table is too small
Reviewed by: Christopher Siden <christopher.siden@delphix.com>
Reviewed by: George Wilson <george.wilson@delphix.com>
Reviewed by: Saso Kiselkov <skiselkov.ml@gmail.com>
Reviewed by: Richard Elling <richard.elling@gmail.com>
Approved by: Gordon Ross <gwr@nexenta.com>
Andrew Hamilton [Wed, 13 Aug 2014 14:58:08 +0000 (10:58 -0400)]
2493 change efi_rescan() to wait longer
Change efi_rescan() to loop 10 times instead of 5 on EBUSY and
to sleep at the end of each loop. This helps with some instances
where the kernel does not reload the partition table fast enough
for ZFS to detect.
Signed-off-by: Andrew Hamilton <ahamilto@tjhsst.edu> Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Closes #2493
Matthew Ahrens [Tue, 15 Jul 2014 07:43:18 +0000 (03:43 -0400)]
Illumos 4631 - zvol_get_stats triggering too many reads
4631 zvol_get_stats triggering too many reads
Reviewed by: Adam Leventhal <ahl@delphix.com>
Reviewed by: Sebastien Roy <sebastien.roy@delphix.com>
Reviewed by: Matt Ahrens <mahrens@delphix.com>
Approved by: Dan McDonald <danmcd@omniti.com>
Richard Yao [Thu, 14 Aug 2014 18:59:12 +0000 (14:59 -0400)]
Drive database update
The Intel DC S3500 and Intel DC S3700 are optimized to handle 4KB
sectors well despite of their 8KB page sizes, so we move them to a new
category for enterprise drives where they will receive ashift=12. They
are joined by the Intel 730 series, which uses the same disk controller,
as well as a San Disk enterprise drive. The drive IDs for these two were
obtained by myself with the drive_id utility. The drive ID for the 240GB
Intel 730 model was extrapolated from the drive ID for the 480GB model.
Lastly, we also add some Western Digital mobile drives. ryuo in
\#zfsonlinux on freenode obtained "ATA WDC WD2500BEVT-0" from
running drive_id on his own hardware. The additional drives in that
family were extrapolated from that identifer.
Signed-off-by: Richard Yao <ryao@gentoo.org> Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Closes #2601
Tim Chase [Thu, 14 Aug 2014 12:01:20 +0000 (07:01 -0500)]
Don't upgrade a metaslab when the pool is not writable
Illumos 4982 added code to metaslab_fragmentation() to proactively update
space maps when the spacemap_histogram feature is enabled. This should
only happen when the pool is writeable.
George Wilson [Sat, 19 Jul 2014 20:19:24 +0000 (12:19 -0800)]
Illumos 4976-4984 - metaslab improvements
4976 zfs should only avoid writing to a failing non-redundant top-level vdev
4978 ztest fails in get_metaslab_refcount()
4979 extend free space histogram to device and pool
4980 metaslabs should have a fragmentation metric
4981 remove fragmented ops vector from block allocator
4982 space_map object should proactively upgrade when feature is enabled
4983 need to collect metaslab information via mdb
4984 device selection should use fragmentation metric
Reviewed by: Matthew Ahrens <mahrens@delphix.com>
Reviewed by: Adam Leventhal <adam.leventhal@delphix.com>
Reviewed by: Christopher Siden <christopher.siden@delphix.com>
Approved by: Garrett D'Amore <garrett@damore.org>
Notes:
The "zdb -M" option has been re-tasked to display the new metaslab
fragmentation metric and the new "zdb -I" option is used to control
the maximum number of in-flight I/Os.
The new fragmentation metric is derived from the space map histogram
which has been rolled up to the vdev and pool level and is presented
to the user via "zpool list".
Add a number of module parameters related to the new metaslab weighting
logic.
Ported by: Tim Chase <tim@chase2k.com> Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Closes #2595
Add a new 'overlay' property (default 'off') that controls whether the
filesystem should be mounted even if the mountpoint is busy or if it
should fail with a 'mountpoint not empty'.
Doing overlay mounts is the default mount behavior on Linux, but not
in ZFS. It have been decided that following the ZFS behavior should
be the default, but this overlay allows for site administrator to
override this decision on a per-dataset basis.
Signed-off-by: Turbo Fredriksson <turbo@bayour.com> Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov> Closes: #2503
Richard Yao [Fri, 20 Jun 2014 17:23:15 +0000 (13:23 -0400)]
Include sys/taskq.h in linux/vfs_compat.h
We should have included sys/taskq.h directly because we use the taskq
code here, but we instead had files that included sys/taskq.h also
include sys/kmem.h, which happened to include sys/taskq.h. sys/kmem.h no
longer does this, so we must define the include as we should
have done in the first place.
Signed-off-by: Richard Yao <ryao@gentoo.org> Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Closes #2411
projects / zfs / log