diff options
| author | Tim Murray <timmurray@google.com> | 2016-01-19 16:33:27 -0800 |
|---|---|---|
| committer | Mattias Nissler <mnissler@google.com> | 2016-07-20 16:18:27 +0200 |
| commit | 49f813ca0f7f33748ccea729f1f1f42fa04b417b (patch) | |
| tree | f00f2cf84da3e5f0e875b5725f8ea3b3bc6f6108 | |
| parent | 6ebf8ac5c853c8bb9356643ef4d98af1fab0269b (diff) | |
| download | v4.4-49f813ca0f7f33748ccea729f1f1f42fa04b417b.tar.gz | |
ANDROID: dm-crypt: run in a WQ_HIGHPRI workqueue
Running dm-crypt 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
Patchset: dm-crypt-highpri-workqueue
Signed-off-by: Mattias Nissler <mnissler@google.com>
Change-Id: Ice4e98c32591f17b1400cfe12b82fa54e9ada1cf
| -rw-r--r-- | drivers/md/dm-crypt.c | 14 |
1 files changed, 11 insertions, 3 deletions
diff --git a/drivers/md/dm-crypt.c b/drivers/md/dm-crypt.c index 3147c8d09ea8..e85bcae50f65 100644 --- a/drivers/md/dm-crypt.c +++ b/drivers/md/dm-crypt.c @@ -1864,16 +1864,24 @@ static int crypt_ctr(struct dm_target *ti, unsigned int argc, char **argv) } ret = -ENOMEM; - cc->io_queue = alloc_workqueue("kcryptd_io", WQ_MEM_RECLAIM, 1); + cc->io_queue = alloc_workqueue("kcryptd_io", + WQ_HIGHPRI | + WQ_MEM_RECLAIM, + 1); if (!cc->io_queue) { ti->error = "Couldn't create kcryptd io queue"; goto bad; } if (test_bit(DM_CRYPT_SAME_CPU, &cc->flags)) - cc->crypt_queue = alloc_workqueue("kcryptd", WQ_CPU_INTENSIVE | WQ_MEM_RECLAIM, 1); + cc->crypt_queue = alloc_workqueue("kcryptd", + WQ_HIGHPRI | + WQ_MEM_RECLAIM, 1); else - cc->crypt_queue = alloc_workqueue("kcryptd", WQ_CPU_INTENSIVE | WQ_MEM_RECLAIM | WQ_UNBOUND, + cc->crypt_queue = alloc_workqueue("kcryptd", + WQ_HIGHPRI | + WQ_MEM_RECLAIM | + WQ_UNBOUND, num_online_cpus()); if (!cc->crypt_queue) { ti->error = "Couldn't create kcryptd queue"; |