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| author | Curt Wohlgemuth <curtw@google.com> | 2011-02-26 18:25:52 +0100 |
|---|---|---|
| committer | Theodore Ts'o <tytso@mit.edu> | 2011-02-26 18:25:52 +0100 |
| commit | e0fd9b90765f604374c42de8ac59d6584afce264 (patch) | |
| tree | 04a44bed155b4d99e81d366145934d801036f5e8 /fs/ext4 | |
| parent | ext4: mballoc: don't replace the current preallocation group unnecessarily (diff) | |
| download | linux-e0fd9b90765f604374c42de8ac59d6584afce264.tar.xz linux-e0fd9b90765f604374c42de8ac59d6584afce264.zip | |
ext4: mark multi-page IO complete on mapping failure
In mpage_da_map_and_submit(), if we have a delayed block
allocation failure from ext4_map_blocks(), we need to mark
the IO as complete, by setting
mpd->io_done = 1;
Otherwise, we could end up submitting the pages in an outer
loop; since they are unlocked on mapping failure in
ext4_da_block_invalidatepages(), this will cause a bug check
in mpage_da_submit_io().
I tested this by injected failures into ext4_map_blocks().
Without this patch, a simple fsstress run will bug check;
with the patch, it works fine.
Signed-off-by: Curt Wohlgemuth <curtw@google.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
Diffstat (limited to 'fs/ext4')
| -rw-r--r-- | fs/ext4/inode.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/fs/ext4/inode.c b/fs/ext4/inode.c index c6c6b7fcb455..fd369dbce6af 100644 --- a/fs/ext4/inode.c +++ b/fs/ext4/inode.c @@ -2314,6 +2314,9 @@ static void mpage_da_map_and_submit(struct mpage_da_data *mpd) /* invalidate all the pages */ ext4_da_block_invalidatepages(mpd, next, mpd->b_size >> mpd->inode->i_blkbits); + + /* Mark this page range as having been completed */ + mpd->io_done = 1; return; } BUG_ON(blks == 0); |