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| author | Andrew Morton <akpm@linux-foundation.org> | 2007-10-16 23:30:37 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@woody.linux-foundation.org> | 2007-10-17 08:43:02 -0700 |
| commit | 670e4def6ef5f44315d62748134e535b479c784f (patch) | |
| tree | 808b850c2f08c3d546f6ca06850815324cb770a3 /fs/fs-writeback.c | |
| parent | 65cb9b47e0ea568a7a38cce7773052a6ea093629 (diff) | |
| download | lwn-670e4def6ef5f44315d62748134e535b479c784f.tar.gz lwn-670e4def6ef5f44315d62748134e535b479c784f.zip | |
writeback: fix time ordering of the per superblock dirty inode lists 7
This one fixes four bugs.
There are a few situation in there where writeback decides it is going to skip
over a blockdev inode on the kernel-internal blockdev superblock. It
presently does this by moving the blockdev inode onto the tail of the blockdev
superblock's s_dirty. But
a) this screws up s_dirty's reverse-time-orderedness and
b) refiling the blockdev for writeback in another 30 second is rude. We
should try again sooner than that.
Fix all this up by using redirty_head(): move the blockdev inode onto the head
of the blockdev superblock's s_dirty list for prompt writeback.
Cc: Mike Waychison <mikew@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'fs/fs-writeback.c')
| -rw-r--r-- | fs/fs-writeback.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/fs/fs-writeback.c b/fs/fs-writeback.c index 30d9383c87c3..39fadfad86f7 100644 --- a/fs/fs-writeback.c +++ b/fs/fs-writeback.c @@ -410,14 +410,14 @@ sync_sb_inodes(struct super_block *sb, struct writeback_control *wbc) wbc->encountered_congestion = 1; if (!sb_is_blkdev_sb(sb)) break; /* Skip a congested fs */ - list_move(&inode->i_list, &sb->s_dirty); + redirty_head(inode); continue; /* Skip a congested blockdev */ } if (wbc->bdi && bdi != wbc->bdi) { if (!sb_is_blkdev_sb(sb)) break; /* fs has the wrong queue */ - list_move(&inode->i_list, &sb->s_dirty); + redirty_head(inode); continue; /* blockdev has wrong queue */ } |