From 06342cf8adb23464deae0f58f8bcb87818a3bee6 Mon Sep 17 00:00:00 2001 From: Christoph Hellwig Date: Fri, 30 Oct 2009 09:09:15 +0000 Subject: [PATCH] xfs: use WRITE_SYNC_PLUG for synchronous writeout The VM and I/O schedulers now expect us to use WRITE_SYNC_PLUG for synchronous writeout. Right now I can't see any changes in performance numbers with this, but we're getting some beating for not using it, and the knowledge definitely could help the block code to make better decisions. Signed-off-by: Christoph Hellwig Reviewed-by: Alex Elder Signed-off-by: Alex Elder --- fs/xfs/linux-2.6/xfs_aops.c | 17 ++++++++++------- 1 file changed, 10 insertions(+), 7 deletions(-) diff --git a/fs/xfs/linux-2.6/xfs_aops.c b/fs/xfs/linux-2.6/xfs_aops.c index c2e30eea74dc..d13fc7391e8b 100644 --- a/fs/xfs/linux-2.6/xfs_aops.c +++ b/fs/xfs/linux-2.6/xfs_aops.c @@ -412,8 +412,9 @@ xfs_end_bio( STATIC void xfs_submit_ioend_bio( - xfs_ioend_t *ioend, - struct bio *bio) + struct writeback_control *wbc, + xfs_ioend_t *ioend, + struct bio *bio) { atomic_inc(&ioend->io_remaining); bio->bi_private = ioend; @@ -426,7 +427,8 @@ xfs_submit_ioend_bio( if (xfs_ioend_new_eof(ioend)) xfs_mark_inode_dirty_sync(XFS_I(ioend->io_inode)); - submit_bio(WRITE, bio); + submit_bio(wbc->sync_mode == WB_SYNC_ALL ? + WRITE_SYNC_PLUG : WRITE, bio); ASSERT(!bio_flagged(bio, BIO_EOPNOTSUPP)); bio_put(bio); } @@ -505,6 +507,7 @@ static inline int bio_add_buffer(struct bio *bio, struct buffer_head *bh) */ STATIC void xfs_submit_ioend( + struct writeback_control *wbc, xfs_ioend_t *ioend) { xfs_ioend_t *head = ioend; @@ -533,19 +536,19 @@ xfs_submit_ioend( retry: bio = xfs_alloc_ioend_bio(bh); } else if (bh->b_blocknr != lastblock + 1) { - xfs_submit_ioend_bio(ioend, bio); + xfs_submit_ioend_bio(wbc, ioend, bio); goto retry; } if (bio_add_buffer(bio, bh) != bh->b_size) { - xfs_submit_ioend_bio(ioend, bio); + xfs_submit_ioend_bio(wbc, ioend, bio); goto retry; } lastblock = bh->b_blocknr; } if (bio) - xfs_submit_ioend_bio(ioend, bio); + xfs_submit_ioend_bio(wbc, ioend, bio); xfs_finish_ioend(ioend, 0); } while ((ioend = next) != NULL); } @@ -1198,7 +1201,7 @@ xfs_page_state_convert( } if (iohead) - xfs_submit_ioend(iohead); + xfs_submit_ioend(wbc, iohead); return page_dirty; -- 2.20.1