diff options
| author | Tim Murray <timmurray@google.com> | 2016-01-19 16:35:17 -0800 |
|---|---|---|
| committer | Mark Salyzyn <salyzyn@google.com> | 2016-02-22 10:44:24 -0800 |
| commit | b4304a87afed66ddb1e24bbd56fef201074d7bc7 (patch) | |
| tree | d8c0c7c2b5ced4d6b77fd6ddd31c4bbf06a18188 | |
| parent | dcdee0d4b76898d13f4979445d77bdcff0641d95 (diff) | |
| download | common-b4304a87afed66ddb1e24bbd56fef201074d7bc7.tar.gz | |
ANDROID: dm-verity: run in a WQ_HIGHPRI workqueue
(cherry picked from commit a96fcc535ba881b4100eb2c9db8423fe7ef23422)
Running dm-verity in a standard workqueue results in IO competing for
CPU time with standard user apps, which can lead to pipeline bubbles and
seriously degraded performance. Move to a WQ_HIGHPRI workqueue to
protect against that.
Signed-off-by: Tim Murray <timmurray@google.com>
Bug: 25392275
Change-Id: Ic65d7bd6f04e4d77780119e926a50e71323575f0
| -rw-r--r-- | drivers/md/dm-verity-target.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/drivers/md/dm-verity-target.c b/drivers/md/dm-verity-target.c index 4258e175513d..185b265a9180 100644 --- a/drivers/md/dm-verity-target.c +++ b/drivers/md/dm-verity-target.c @@ -1046,7 +1046,9 @@ static int verity_ctr(struct dm_target *ti, unsigned argc, char **argv) } /* WQ_UNBOUND greatly improves performance when running on ramdisk */ - v->verify_wq = alloc_workqueue("kverityd", WQ_CPU_INTENSIVE | WQ_MEM_RECLAIM | WQ_UNBOUND, num_online_cpus()); + v->verify_wq = alloc_workqueue("kverityd", + WQ_HIGHPRI | WQ_MEM_RECLAIM | WQ_UNBOUND, + num_online_cpus()); if (!v->verify_wq) { ti->error = "Cannot allocate workqueue"; r = -ENOMEM; |