Default to zvol_request_async=0

Change the default ZVOL behavior so requests are handled asynchronously.
This behavior is functionally the same as in the zfs-0.6.4 release.

Reviewed-by: Chunwei Chen <david.chen@osnexus.com>
Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Issue #5902

diff --git a/man/man5/zfs-module-parameters.5 b/man/man5/zfs-module-parameters.5
index 2fbab1d010de326469c5f22196b061c1778419d9..51f1cd93f1cf3f2f6e8e9dc008818bd57efdf6f2 100644 (file)
--- a/man/man5/zfs-module-parameters.5
+++ b/man/man5/zfs-module-parameters.5
@@ -2060,7 +2060,7 @@ effectively limits the queue depth to 1 for each I/O submitter.  When set
 to 0 requests are handled asynchronously by a thread pool.  The number of
 requests which can be handled concurrently is controller by \fBzvol_threads\fR.
 .sp
-Default value: \fB1\fR.
+Default value: \fB0\fR.
 .RE
 
 .sp

diff --git a/module/zfs/zvol.c b/module/zfs/zvol.c
index fef1d299a0c15068aaaabd43de2c45c8864270ac..6cd366602f814203d3227b345815668a3ebd9c47 100644 (file)
--- a/module/zfs/zvol.c
+++ b/module/zfs/zvol.c
@@ -57,7 +57,7 @@
 unsigned int zvol_inhibit_dev = 0;
 unsigned int zvol_major = ZVOL_MAJOR;
 unsigned int zvol_threads = 32;
-unsigned int zvol_request_sync = 1;
+unsigned int zvol_request_sync = 0;
 unsigned int zvol_prefetch_bytes = (128 * 1024);
 unsigned long zvol_max_discard_blocks = 16384;