From e0fd9b90765f604374c42de8ac59d6584afce264 Mon Sep 17 00:00:00 2001 From: Curt Wohlgemuth Date: Sat, 26 Feb 2011 12:25:52 -0500 Subject: [PATCH] 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 Signed-off-by: "Theodore Ts'o" --- fs/ext4/inode.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/fs/ext4/inode.c b/fs/ext4/inode.c index c6c6b7f..fd369db 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); -- 2.7.4