Date: Mon, 13 Oct 2008 14:05:01 +0000 (UTC) From: Konstantin Belousov <kib@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r183822 - head/sys/ufs/ffs Message-ID: <200810131405.m9DE51Zq077977@svn.freebsd.org>
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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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