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[48/49] mpage: make __mpage_writepage() honor cgroup writeback

Message ID 1428350318-8215-49-git-send-email-tj@kernel.org (mailing list archive)
State New, archived
Headers show

Commit Message

Tejun Heo April 6, 2015, 7:58 p.m. UTC
__mpage_writepage() is used to implement mpage_writepages() which in
turn is used for ->writepages() of various filesystems.  All writeback
logic is now updated to handle cgroup writeback and the block cgroup
to issue IOs for is encoded in writeback_control and can be retrieved
from the inode; however, __mpage_writepage() currently ignores the
blkcg indicated by the inode and issues all bio's without explicit
blkcg association.

This patch updates __mpage_writepage() so that the issued bio's are
associated with inode_to_writeback_blkcg_css(inode).

v2: Updated for per-inode wb association.

Signed-off-by: Tejun Heo <tj@kernel.org>
Cc: Jens Axboe <axboe@kernel.dk>
Cc: Jan Kara <jack@suse.cz>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Alexander Viro <viro@zeniv.linux.org.uk>
 fs/mpage.c | 2 ++
 1 file changed, 2 insertions(+)
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diff --git a/fs/mpage.c b/fs/mpage.c
index 3e79220..a3ccb0b 100644
--- a/fs/mpage.c
+++ b/fs/mpage.c
@@ -605,6 +605,8 @@  alloc_new:
 				bio_get_nr_vecs(bdev), GFP_NOFS|__GFP_HIGH);
 		if (bio == NULL)
 			goto confused;
+		bio_associate_blkcg(bio, inode_to_wb_blkcg_css(inode));