tree 891b19b5a5c21e0a9daddcf281892184113265dc
parent 903d23f0a354f226fa78f1c1c34b60aaf992e812
author Josef Bacik <jbacik@fb.com> 1530630893 -0400
committer Jens Axboe <axboe@kernel.dk> 1531148874 -0600

blk: introduce REQ_SWAP

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 <jbacik@fb.com>
Acked-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Jens Axboe <axboe@kernel.dk>