Allow 16M zio buffers in user space

Only restrict the maximum zio alloc size to 32-bit kernel space.
The same virtual address space limitations don't apply to user
space.  This resolves a memory allocation failure in raidz_test
where it expects to be able to exercises all valid zio sizes.

Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>

diff --git a/module/zfs/zio.c b/module/zfs/zio.c
index 638e3d805a0ad7d936c1df9d0a266b2f7736badd..223c20abe424deb88f0d79eaa0a429ea59353e66 100644 (file)
--- a/module/zfs/zio.c
+++ b/module/zfs/zio.c
@@ -131,7 +131,7 @@ zio_init(void)
                size_t align = 0;
                size_t cflags = (size > zio_buf_debug_limit) ? KMC_NODEBUG : 0;
 
-#ifdef _ILP32
+#if defined(_ILP32) && defined(_KERNEL)
                /*
                 * Cache size limited to 1M on 32-bit platforms until ARC
                 * buffers no longer require virtual address space.