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| author | Tejun Heo <tj@kernel.org> | 2019-06-27 13:39:50 -0700 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2019-07-10 09:00:57 -0600 |
| commit | 27b36d8fa81fa8274fb72f4eb1484026f6b6daa8 (patch) | |
| tree | 3880d0298b096462f409a526bfbd52f7ef7875a8 /fs/fs-writeback.c | |
| parent | 34e51a5e1a6e939ed7d99c38173821ab86d577f4 (diff) | |
| download | linux-27b36d8fa81fa8274fb72f4eb1484026f6b6daa8.tar.bz2 | |
blkcg, writeback: Add wbc->no_cgroup_owner
When writeback IOs are bounced through async layers, the IOs should
only be accounted against the wbc from the original bdi writeback to
avoid confusing cgroup inode ownership arbitration. Add
wbc->no_cgroup_owner to allow disabling wbc cgroup owner accounting.
This will be used make btrfs compression work well with cgroup IO
control.
v2: Renamed from no_wbc_acct to no_cgroup_owner and added comment as
per Jan.
Reviewed-by: Josef Bacik <josef@toxicpanda.com>
Reviewed-by: Jan Kara <jack@suse.cz>
Signed-off-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'fs/fs-writeback.c')
| -rw-r--r-- | fs/fs-writeback.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/fs/fs-writeback.c b/fs/fs-writeback.c index 0aef79e934bb..542b02d170f8 100644 --- a/fs/fs-writeback.c +++ b/fs/fs-writeback.c @@ -727,7 +727,7 @@ void wbc_account_cgroup_owner(struct writeback_control *wbc, struct page *page, * behind a slow cgroup. Ultimately, we want pageout() to kick off * regular writeback instead of writing things out itself. */ - if (!wbc->wb) + if (!wbc->wb || wbc->no_cgroup_owner) return; css = mem_cgroup_css_from_page(page); |