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| author | Andrew Morton <akpm@linux-foundation.org> | 2007-10-17 06:30:35 (GMT) |
|---|---|---|
| committer | Linus Torvalds <torvalds@woody.linux-foundation.org> | 2007-10-17 15:43:02 (GMT) |
| commit | 1b43ef91d40190b16ba10218e66d5c2c4ba11de3 (patch) | |
| tree | 21d46e09ae07ae8a7ea0b0d9927b1dafb8787155 | |
| parent | c986d1e2a460cbce79d631c51519ae82c778c6c5 (diff) | |
| download | linux-1b43ef91d40190b16ba10218e66d5c2c4ba11de3.tar.xz | |
writeback: fix comment, use helper function
There's a comment in there which claims that the inode is left on s_io
if nfs chickened out of writing some data.
But that's not been true for three years.
9290280ced13c85689adeffa587e9a53bd3a5873 fixed a livelock by moving these
inodes back onto s_dirty. Fix the comment.
In the second leg of the `if', use redirty_tail() rather than open-coding it.
Add weaselly comment indicating lack of confidence in the code and lack of the
fortitude which would be needed to fiddle with it.
Cc: Mike Waychison <mikew@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 | 15 |
1 files changed, 11 insertions, 4 deletions
diff --git a/fs/fs-writeback.c b/fs/fs-writeback.c index eb8dc1f..a3d7a82 100644 --- a/fs/fs-writeback.c +++ b/fs/fs-writeback.c @@ -201,7 +201,6 @@ __sync_single_inode(struct inode *inode, struct writeback_control *wbc) { unsigned dirty; struct address_space *mapping = inode->i_mapping; - struct super_block *sb = inode->i_sb; int wait = wbc->sync_mode == WB_SYNC_ALL; int ret; @@ -237,7 +236,16 @@ __sync_single_inode(struct inode *inode, struct writeback_control *wbc) /* * We didn't write back all the pages. nfs_writepages() * sometimes bales out without doing anything. Redirty - * the inode. It is still on sb->s_io. + * the inode. It is moved from s_io onto s_dirty. + */ + /* + * akpm: if the caller was the kupdate function we put + * this inode at the head of s_dirty so it gets first + * consideration. Otherwise, move it to the tail, for + * the reasons described there. I'm not really sure + * how much sense this makes. Presumably I had a good + * reasons for doing it this way, and I'd rather not + * muck with it at present. */ if (wbc->for_kupdate) { /* @@ -257,8 +265,7 @@ __sync_single_inode(struct inode *inode, struct writeback_control *wbc) * all the other files. */ inode->i_state |= I_DIRTY_PAGES; - inode->dirtied_when = jiffies; - list_move(&inode->i_list, &sb->s_dirty); + redirty_tail(inode); } } else if (inode->i_state & I_DIRTY) { /* |