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(parent: 77ae6bb) | patch
blk: introduce REQ_SWAP
authorJosef Bacik <jbacik@fb.com>
Tue, 3 Jul 2018 15:14:53 +0000 (11:14 -0400)
committerJens Axboe <axboe@kernel.dk>
Mon, 9 Jul 2018 15:07:54 +0000 (09:07 -0600)
commitb03a77ffef4f326c702f7f83c4a22a84e2e6847c
tree891b19b5a5c21e0a9daddcf281892184113265dctree | snapshot
parent77ae6bbd48d07aaf45b3b1a19664799896678a4fcommit | diff
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>
include/linux/blk-cgroup.h diff | blob | history
include/linux/blk_types.h diff | blob | history
mm/page_io.c diff | blob | history
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