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dm crypt: export sysfs of kcryptd workqueue 

It should be helpful to export sysfs of "kcryptd" workqueue in some
cases, such as setting specific CPU affinity of the workqueue.

Besides, also tweak the name format a little. The slash inside a
directory name will be translate into exclamation mark, such as
/sys/devices/virtual/workqueue/'kcryptd!253:0'.

Signed-off-by: Jeffle Xu <jefflexu@linux.alibaba.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
This commit is contained in:
Jeffle Xu 2020-11-30 19:33:39 +08:00 committed by Mike Snitzer
parent 4d7659bfbe
commit a2b8b2d975
1 changed files with 4 additions and 3 deletions
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7
drivers/md/dm-crypt.c
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@ -3166,11 +3166,12 @@ static int crypt_ctr(struct dm_target *ti, unsigned int argc, char **argv)
}
if (test_bit(DM_CRYPT_SAME_CPU, &cc->flags))
cc->crypt_queue = alloc_workqueue("kcryptd/%s", WQ_CPU_INTENSIVE | WQ_MEM_RECLAIM,
cc->crypt_queue = alloc_workqueue("kcryptd-%s", WQ_CPU_INTENSIVE | WQ_MEM_RECLAIM,
1, devname);
else
cc->crypt_queue = alloc_workqueue("kcryptd/%s",
WQ_CPU_INTENSIVE | WQ_MEM_RECLAIM | WQ_UNBOUND,
cc->crypt_queue = alloc_workqueue("kcryptd-%s",
WQ_CPU_INTENSIVE | WQ_MEM_RECLAIM |
WQ_UNBOUND | WQ_SYSFS,
num_online_cpus(), devname);
if (!cc->crypt_queue) {
ti->error = "Couldn't create kcryptd queue";