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introduce I_SYNC

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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.

[[email protected]: make fs/inode.c:wake_up_inode() static]
Signed-off-by: Joern Engel <[email protected]>
Cc: Dave Kleikamp <[email protected]>
Cc: David Chinner <[email protected]>
Cc: Anton Altaparmakov <[email protected]>
Cc: Al Viro <[email protected]>
Cc: Christoph Hellwig <[email protected]>
Signed-off-by: Adrian Bunk <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
This commit is contained in:
Joern Engel 2007-10-16 23:30:44 -07:00 • committed by Linus Torvalds
commit 1c0eeaf569
8 changed files with 116 additions and 42 deletions
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9
fs/jfs/jfs_txnmgr.c
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@ -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;
}