On Tue, May 29, 2018 at 05:17:15PM -0400, Josef Bacik wrote:

From: Josef Bacik <redacted>

Just like REQ_META, it's important to know the IO coming down is swap
in order to guard against potential IO priority inversion issues with
cgroups.  Add REQ_SWAP and use it for all swap IO, and add it to our
bio_issue_as_root_blkg helper.

Signed-off-by: Josef Bacik <redacted>

Acked-by: Tejun Heo <tj@kernel.org>

Thanks.

-- 
tejun