From: Aneesh Kumar K.V <aneesh.kumar@xxxxxxxxxxxxxxxxxx> The BH_Delay and BH_Unwritten flags should never leak out to submit_bh(). So add some BUG_ON() checks to submit_bh so we can get a stack trace and determine how and why this might have happened. (Note that only XFS and ext4 use these buffer head flags, and XFS does not use submit_bh(). So this patch should only modify behavior for ext4.) Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@xxxxxxxxxxxxxxxxxx> Signed-off-by: "Theodore Ts'o" <tytso@xxxxxxx> Cc: linux-fsdevel@xxxxxxxxxxxxxxx --- fs/buffer.c | 2 ++ 1 files changed, 2 insertions(+), 0 deletions(-) diff --git a/fs/buffer.c b/fs/buffer.c index aed2977..ad01129 100644 --- a/fs/buffer.c +++ b/fs/buffer.c @@ -2933,6 +2933,8 @@ int submit_bh(int rw, struct buffer_head * bh) BUG_ON(!buffer_locked(bh)); BUG_ON(!buffer_mapped(bh)); BUG_ON(!bh->b_end_io); + BUG_ON(buffer_delay(bh)); + BUG_ON(buffer_unwritten(bh)); /* * Mask in barrier bit for a write (could be either a WRITE or a -- 1.6.3.rc4.1.g3e14.dirty -- To unsubscribe from this list: send the line "unsubscribe linux-fsdevel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
