Author: mckusick
Date: Mon Jul 31 20:41:45 2017
New Revision: 321816
URL: https://svnweb.freebsd.org/changeset/base/321816
Log:
Avoid reading a snapshot block when it is already in the cache.
Update the use of the B_CACHE flag (since the May 1999 commit
that made it the correct test here).
Reported by: Andreas Longwitz <longw...@incore.de>
Reviewed by: kib
Tested by: Peter Holm
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 Jul 31 20:28:26 2017
(r321815)
+++ head/sys/ufs/ffs/ffs_snapshot.c Mon Jul 31 20:41:45 2017
(r321816)
@@ -1394,7 +1394,7 @@ indiracct_ufs2(snapvp, cancelvp, level, blkno, lbn, rl
*/
bp = getblk(cancelvp, lbn, fs->fs_bsize, 0, 0, 0);
bp->b_blkno = fsbtodb(fs, blkno);
- if ((bp->b_flags & (B_DONE | B_DELWRI)) == 0 &&
+ if ((bp->b_flags & B_CACHE) == 0 &&
(error = readblock(cancelvp, bp, fragstoblks(fs, blkno)))) {
brelse(bp);
return (error);
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