diff options
| author | Qi Yong <qiyong@fc-cn.com> | 2008-02-05 07:29:23 +0100 |
|---|---|---|
| committer | Linus Torvalds <torvalds@woody.linux-foundation.org> | 2008-02-05 18:44:18 +0100 |
| commit | 2d544564f9954860235db97df2e549a66c61f557 (patch) | |
| tree | b539ab01562ae5b92ce365afd32e8fbab74a7e11 | |
| parent | mm: don't waste swap on locked pages (diff) | |
| download | linux-2d544564f9954860235db97df2e549a66c61f557.tar.xz linux-2d544564f9954860235db97df2e549a66c61f557.zip | |
skip writing data pages when inode is under I_SYNC
Since I_SYNC was split out from I_LOCK, the concern in commit
4b89eed93e0fa40a63e3d7b1796ec1337ea7a3aa ("Write back inode data pages
even when the inode itself is locked") is not longer valid.
We should revert to the original behavior: in __writeback_single_inode(),
when we find an I_SYNC-ed inode and we're not doing a data-integrity sync,
skip writing entirely. Otherwise, we are double calling do_writepages()
Signed-off-by: Qi Yong <qiyong@fc-cn.com>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Hugh Dickins <hugh@veritas.com>
Cc: Joern Engel <joern@wohnheim.fh-wedel.de>
Cc: WU Fengguang <wfg@mail.ustc.edu.cn>
Cc: Michael Rubin <mrubin@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
| -rw-r--r-- | fs/fs-writeback.c | 13 |
1 files changed, 1 insertions, 12 deletions
diff --git a/fs/fs-writeback.c b/fs/fs-writeback.c index 300324bd563c..3fe782d70a71 100644 --- a/fs/fs-writeback.c +++ b/fs/fs-writeback.c @@ -334,9 +334,6 @@ __writeback_single_inode(struct inode *inode, struct writeback_control *wbc) WARN_ON(inode->i_state & I_WILL_FREE); if ((wbc->sync_mode != WB_SYNC_ALL) && (inode->i_state & I_SYNC)) { - struct address_space *mapping = inode->i_mapping; - int ret; - /* * We're skipping this inode because it's locked, and we're not * doing writeback-for-data-integrity. Move it to s_more_io so @@ -345,15 +342,7 @@ __writeback_single_inode(struct inode *inode, struct writeback_control *wbc) * completed a full scan of s_io. */ requeue_io(inode); - - /* - * Even if we don't actually write the inode itself here, - * we can at least start some of the data writeout.. - */ - spin_unlock(&inode_lock); - ret = do_writepages(mapping, wbc); - spin_lock(&inode_lock); - return ret; + return 0; } /* |