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authorJoern Engel <joern@wohnheim.fh-wedel.de>2007-10-16 23:30:44 -0700
committerLinus Torvalds <torvalds@woody.linux-foundation.org>2007-10-17 08:43:02 -0700
commit1c0eeaf5698597146ed9b873e2f9e0961edcf0f9 (patch)
tree5265eac8437e8ce517a62db8fe2bd99db5b7019b /fs/jfs/jfs_txnmgr.c
parent2e6883bdf49abd0e7f0d9b6297fc3be7ebb2250b (diff)
downloadop-kernel-dev-1c0eeaf5698597146ed9b873e2f9e0961edcf0f9.zip
op-kernel-dev-1c0eeaf5698597146ed9b873e2f9e0961edcf0f9.tar.gz
introduce I_SYNC
I_LOCK was used for several unrelated purposes, which caused deadlock situations in certain filesystems as a side effect. One of the purposes now uses the new I_SYNC bit. Also document the various bits and change their order from historical to logical. [bunk@stusta.de: make fs/inode.c:wake_up_inode() static] Signed-off-by: Joern Engel <joern@wohnheim.fh-wedel.de> Cc: Dave Kleikamp <shaggy@linux.vnet.ibm.com> Cc: David Chinner <dgc@sgi.com> Cc: Anton Altaparmakov <aia21@cam.ac.uk> Cc: Al Viro <viro@ftp.linux.org.uk> Cc: Christoph Hellwig <hch@infradead.org> Signed-off-by: Adrian Bunk <bunk@stusta.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'fs/jfs/jfs_txnmgr.c')
-rw-r--r--fs/jfs/jfs_txnmgr.c9
1 files changed, 8 insertions, 1 deletions
diff --git a/fs/jfs/jfs_txnmgr.c b/fs/jfs/jfs_txnmgr.c
index 7aa1f70..e7c60ae 100644
--- a/fs/jfs/jfs_txnmgr.c
+++ b/fs/jfs/jfs_txnmgr.c
@@ -1289,7 +1289,14 @@ int txCommit(tid_t tid, /* transaction identifier */
* commit the transaction synchronously, so the last iput
* will be done by the calling thread (or later)
*/
- if (tblk->u.ip->i_state & I_LOCK)
+ /*
+ * I believe this code is no longer needed. Splitting I_LOCK
+ * into two bits, I_LOCK and I_SYNC should prevent this
+ * deadlock as well. But since I don't have a JFS testload
+ * to verify this, only a trivial s/I_LOCK/I_SYNC/ was done.
+ * Joern
+ */
+ if (tblk->u.ip->i_state & I_SYNC)
tblk->xflag &= ~COMMIT_LAZY;
}
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