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GFS2: glock livelock

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This patch fixes a couple gfs2 problems with the reclaiming of
unlinked dinodes.  First, there were a couple of livelocks where
everything would come to a halt waiting for a glock that was
seemingly held by a process that no longer existed.  In fact, the
process did exist, it just had the wrong pid number in the holder
information.  Second, there was a lock ordering problem between
inode locking and glock locking.  Third, glock/inode contention
could sometimes cause inodes to be improperly marked invalid by
iget_failed.

Signed-off-by: Bob Peterson <rpeterso@redhat.com>
This commit is contained in:
Bob Peterson
2010-04-14 11:58:16 -04:00
committed by Steven Whitehouse
parent 602c89d2e3
commit 1a0eae8848
7 changed files with 144 additions and 29 deletions
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2
fs/gfs2/export.c
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@ -169,7 +169,7 @@ static struct dentry *gfs2_get_dentry(struct super_block *sb,
if (error)
goto fail;
inode = gfs2_inode_lookup(sb, DT_UNKNOWN, inum->no_addr, 0, 0);
inode = gfs2_inode_lookup(sb, DT_UNKNOWN, inum->no_addr, 0);
if (IS_ERR(inode)) {
error = PTR_ERR(inode);
goto fail;