svn commit: r348573 - vendor-sys/illumos/dist/uts/common/fs/zfs

[Alexander Motin]

Author: mav
Date: Mon Jun  3 19:24:40 2019
New Revision: 348573
URL: https://svnweb.freebsd.org/changeset/base/348573

Log:
  9993 zil writes can get delayed in zio pipeline
  
  illumos/illumos-gate at 2258ad0b755b24a55c6173b1e6bb6188389f72dd
  
  Reviewed by: Prakash Surya <prakash.surya at delphix.com>
  Reviewed by: Brad Lewis <brad.lewis at delphix.com>
  Reviewed by: Matt Ahrens <matt at delphix.com>
  Approved by: Dan McDonald <danmcd at joyent.com>
  Author:     George Wilson <george.wilson at delphix.com>

Modified:
  vendor-sys/illumos/dist/uts/common/fs/zfs/zio.c

Modified: vendor-sys/illumos/dist/uts/common/fs/zfs/zio.c
==============================================================================
--- vendor-sys/illumos/dist/uts/common/fs/zfs/zio.c	Mon Jun  3 19:20:10 2019	(r348572)
+++ vendor-sys/illumos/dist/uts/common/fs/zfs/zio.c	Mon Jun  3 19:24:40 2019	(r348573)
@@ -1497,7 +1497,8 @@ zio_taskq_dispatch(zio_t *zio, zio_taskq_type_t q, boo
 	 * If this is a high priority I/O, then use the high priority taskq if
 	 * available.
 	 */
-	if (zio->io_priority == ZIO_PRIORITY_NOW &&
+	if ((zio->io_priority == ZIO_PRIORITY_NOW ||
+	    zio->io_priority == ZIO_PRIORITY_SYNC_WRITE) &&
 	    spa->spa_zio_taskq[t][q + 1].stqs_count != 0)
 		q++;