Author: avg
Date: Fri Apr 8 11:58:24 2016
New Revision: 297709
URL: https://svnweb.freebsd.org/changeset/base/297709
Log:
zio write issue threads should have lower (numerically greater) priority
This is because they might do data compression which is quite CPU
expensive. The original code is correct for illumos, because there
a higher priority corresponds to a greater number.
MFC after: 2 weeks
Modified:
head/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/spa.c
Modified: head/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/spa.c
==============================================================================
--- head/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/spa.c Fri Apr 8
11:43:22 2016 (r297708)
+++ head/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/spa.c Fri Apr 8
11:58:24 2016 (r297709)
@@ -929,7 +929,7 @@ spa_taskqs_init(spa_t *spa, zio_type_t t
* than the other taskqs.
*/
if (t == ZIO_TYPE_WRITE && q == ZIO_TASKQ_ISSUE)
- pri--;
+ pri++;
tq = taskq_create_proc(name, value, pri, 50,
INT_MAX, spa->spa_proc, flags);
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