Author: mav
Date: Sun Mar 20 20:25:36 2016
New Revision: 297081
URL: https://svnweb.freebsd.org/changeset/base/297081
Log:
MFC r277503 (by will): Ignore sync requests from the system syncher,
i.e. VFS_SYNC(waitfor=MNT_LAZY).
ZFS already commits outstanding data every zfs_txg_timeout seconds, so these
syncs are unnecessarily intrusive.
MFSpectraBSD: 1105759 on 2014/12/11
Modified:
stable/10/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/zfs_vfsops.c
Directory Properties:
stable/10/ (props changed)
Modified: stable/10/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/zfs_vfsops.c
==============================================================================
--- stable/10/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/zfs_vfsops.c
Sun Mar 20 20:23:20 2016 (r297080)
+++ stable/10/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/zfs_vfsops.c
Sun Mar 20 20:25:36 2016 (r297081)
@@ -133,6 +133,13 @@ zfs_sync(vfs_t *vfsp, int waitfor)
if (panicstr)
return (0);
+ /*
+ * Ignore the system syncher. ZFS already commits async data
+ * at zfs_txg_timeout intervals.
+ */
+ if (waitfor == MNT_LAZY)
+ return (0);
+
if (vfsp != NULL) {
/*
* Sync a specific filesystem.
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