Author: kib
Date: Mon Oct 13 14:05:01 2008
New Revision: 183822
URL: http://svn.freebsd.org/changeset/base/183822
Log:
Sync up summary information for cylinder groups while data is already
in memory during snapshot creation. This improves the results of the
background fsck.
Submitted by: tegge
MFC after: 1 week
Modified:
head/sys/ufs/ffs/ffs_snapshot.c
Modified: head/sys/ufs/ffs/ffs_snapshot.c
==============================================================================
--- head/sys/ufs/ffs/ffs_snapshot.c Mon Oct 13 14:01:05 2008
(r183821)
+++ head/sys/ufs/ffs/ffs_snapshot.c Mon Oct 13 14:05:01 2008
(r183822)
@@ -864,6 +864,13 @@ cgaccount(cg, vp, nbp, passno)
}
UFS_LOCK(ip->i_ump);
ACTIVESET(fs, cg);
+ /*
+ * Recomputation of summary information might not have been performed
+ * at mount time. Sync up summary information for current cylinder
+ * group while data is in memory to ensure that result of background
+ * fsck is slightly more consistent.
+ */
+ fs->fs_cs(fs, cg) = cgp->cg_cs;
UFS_UNLOCK(ip->i_ump);
bcopy(bp->b_data, nbp->b_data, fs->fs_cgsize);
if (fs->fs_cgsize < fs->fs_bsize)
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