Author: kib
Date: Tue Feb 21 01:37:27 2012
New Revision: 231952
URL: http://svn.freebsd.org/changeset/base/231952
Log:
MFC r231160 (by mckusick):
Do not fsync all resident UFS vnodes from the syncer vnode call
to ffs_sync(). Since all inode metadata updates are translated to
inodeblock updates, the vnodes syncing is handled by syncer dirty buffer
wheel. The only things that shall be synced by ffs_sync() from the
syncer calls are the filesystem metadata proper.
Modified:
stable/9/sys/ufs/ffs/ffs_vfsops.c
Directory Properties:
stable/9/sys/ (props changed)
Modified: stable/9/sys/ufs/ffs/ffs_vfsops.c
==============================================================================
--- stable/9/sys/ufs/ffs/ffs_vfsops.c Tue Feb 21 01:27:23 2012
(r231951)
+++ stable/9/sys/ufs/ffs/ffs_vfsops.c Tue Feb 21 01:37:27 2012
(r231952)
@@ -1436,17 +1436,26 @@ ffs_sync(mp, waitfor)
int softdep_accdeps;
struct bufobj *bo;
+ wait = 0;
+ suspend = 0;
+ suspended = 0;
td = curthread;
fs = ump->um_fs;
if (fs->fs_fmod != 0 && fs->fs_ronly != 0 && ump->um_fsckpid == 0)
panic("%s: ffs_sync: modification on read-only filesystem",
fs->fs_fsmnt);
/*
+ * For a lazy sync, we just care about the filesystem metadata.
+ */
+ if (waitfor == MNT_LAZY) {
+ secondary_accwrites = 0;
+ secondary_writes = 0;
+ lockreq = 0;
+ goto metasync;
+ }
+ /*
* Write back each (modified) inode.
*/
- wait = 0;
- suspend = 0;
- suspended = 0;
lockreq = LK_EXCLUSIVE | LK_NOWAIT;
if (waitfor == MNT_SUSPEND) {
suspend = 1;
@@ -1517,11 +1526,12 @@ loop:
#ifdef QUOTA
qsync(mp);
#endif
+
+metasync:
devvp = ump->um_devvp;
bo = &devvp->v_bufobj;
BO_LOCK(bo);
- if (waitfor != MNT_LAZY &&
- (bo->bo_numoutput > 0 || bo->bo_dirty.bv_cnt > 0)) {
+ if (bo->bo_numoutput > 0 || bo->bo_dirty.bv_cnt > 0) {
BO_UNLOCK(bo);
vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY);
if ((error = VOP_FSYNC(devvp, waitfor, td)) != 0)
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