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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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5
fs/gfs2/inode.h
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@@ -83,8 +83,9 @@ static inline void gfs2_inum_out(const struct gfs2_inode *ip,
extern void gfs2_set_iop(struct inode *inode);
extern struct inode *gfs2_inode_lookup(struct super_block *sb, unsigned type,
u64 no_addr, u64 no_formal_ino,
int skip_freeing);
u64 no_addr, u64 no_formal_ino);
extern int gfs2_unlinked_inode_lookup(struct super_block *sb, u64 no_addr,
struct inode **inode);
extern struct inode *gfs2_ilookup(struct super_block *sb, u64 no_addr);
extern int gfs2_inode_refresh(struct gfs2_inode *ip);