svn commit: r367487 - head/sys/contrib/openzfs/module/os/freebsd/zfs

[Mariusz Zaborski]

Author: oshogbo
Date: Sun Nov  8 14:08:00 2020
New Revision: 367487
URL: https://svnweb.freebsd.org/changeset/base/367487

Log:
  Check if the ZVOL has been written before calling zil_async_to_sync.
  The ZIL will be opened on the first write, not earlier.
  
  Reviewed-by: Ryan Moeller <ryan at iXsystems.com>
  Reviewed-by: Brian Behlendorf <behlendorf1 at llnl.gov>
  Signed-off-by: Mariusz Zaborski <oshogbo at vexillium.org>
  OpenZFS Pull Request: https://github.com/openzfs/zfs/pull/11152
  PR:		250934

Modified:
  head/sys/contrib/openzfs/module/os/freebsd/zfs/zvol_os.c

Modified: head/sys/contrib/openzfs/module/os/freebsd/zfs/zvol_os.c
==============================================================================
--- head/sys/contrib/openzfs/module/os/freebsd/zfs/zvol_os.c	Sun Nov  8 13:30:44 2020	(r367486)
+++ head/sys/contrib/openzfs/module/os/freebsd/zfs/zvol_os.c	Sun Nov  8 14:08:00 2020	(r367487)
@@ -890,7 +890,8 @@ zvol_cdev_open(struct cdev *dev, int flags, int fmt, s
 	if (flags & (FSYNC | FDSYNC)) {
 		zsd = &zv->zv_zso->zso_dev;
 		zsd->zsd_sync_cnt++;
-		if (zsd->zsd_sync_cnt == 1)
+		if (zsd->zsd_sync_cnt == 1 &&
+		    (zv->zv_flags & ZVOL_WRITTEN_TO) != 0)
 			zil_async_to_sync(zv->zv_zilog, ZVOL_OBJ);
 	}