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Commit f5e596bb authored by Christoph Hellwig's avatar Christoph Hellwig Committed by Nathan Scott
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[XFS] fix writeback control handling fix a reversed condition on where to 


trylock and deal with block layer congestion properly.	Patch from David
Chinner and Christoph Hellwig.

SGI-PV: 947118
SGI-Modid: xfs-linux-melb:xfs-kern:203830a

Signed-off-by: default avatarChristoph Hellwig <hch@sgi.com>
Signed-off-by: default avatarNathan Scott <nathans@sgi.com>
parent 6c4fe19f

fs/xfs/linux-2.6/xfs_aops.c

+12 −3
Original line number Diff line number Diff line
@@ -722,8 +722,17 @@ xfs_convert_page( 
		SetPageUptodate(page);



	if (startio) {

		if (count)

			wbc->nr_to_write--;

		if (count) {

			struct backing_dev_info *bdi;



			bdi = inode->i_mapping->backing_dev_info;

			if (bdi_write_congested(bdi)) {

				wbc->encountered_congestion = 1;

				done = 1;

			} else if (--wbc->nr_to_write <= 0) {

				done = 1;

			}

		}

		xfs_start_page_writeback(page, wbc, !page_dirty, count);

	}
@@ -812,7 +821,7 @@ xfs_page_state_convert( 
	int			all_bh = unmapped;



	/* wait for other IO threads? */

	if (startio && wbc->sync_mode != WB_SYNC_NONE)

	if (startio && (wbc->sync_mode == WB_SYNC_NONE && wbc->nonblocking))

		trylock_flag |= BMAPI_TRYLOCK;



	/* Is this page beyond the end of the file? */