Commit 429b3fb0 authored by Tejun Heo's avatar Tejun Heo Committed by Jens Axboe

mpage: make __mpage_writepage() honor cgroup writeback

__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: default avatarTejun Heo <>
Cc: Jens Axboe <>
Cc: Jan Kara <>
Cc: Andrew Morton <>
Cc: Alexander Viro <>
Signed-off-by: default avatarJens Axboe <>
parent bafc0dba
......@@ -605,6 +605,8 @@ static int __mpage_writepage(struct page *page, struct writeback_control *wbc,
bio_get_nr_vecs(bdev), GFP_NOFS|__GFP_HIGH);
if (bio == NULL)
goto confused;
bio_associate_blkcg(bio, inode_to_wb_blkcg_css(inode));
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