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Commit ed0302e8 authored by Michał Mirosław's avatar Michał Mirosław Committed by Mike Snitzer
Browse files

dm crypt: make workqueue names device-specific 



Make cpu-usage debugging easier by naming workqueues per device.

Example ps output:

root       413  0.0  0.0      0     0 ?        I<   paź02   0:00  [kcryptd_io/253:0]
root       414  0.0  0.0      0     0 ?        I<   paź02   0:00  [kcryptd/253:0]
root       415  0.0  0.0      0     0 ?        S    paź02   1:10  [dmcrypt_write/253:0]
root       465  0.0  0.0      0     0 ?        I<   paź02   0:00  [kcryptd_io/253:2]
root       466  0.0  0.0      0     0 ?        I<   paź02   0:00  [kcryptd/253:2]
root       467  0.0  0.0      0     0 ?        S    paź02   2:06  [dmcrypt_write/253:2]
root     15359  0.2  0.0      0     0 ?        I<   19:43   0:25  [kworker/u17:8-kcryptd/253:0]
root     16563  0.2  0.0      0     0 ?        I<   20:10   0:18  [kworker/u17:0-kcryptd/253:2]
root     23205  0.1  0.0      0     0 ?        I<   21:21   0:04  [kworker/u17:4-kcryptd/253:0]
root     13383  0.1  0.0      0     0 ?        I<   21:32   0:02  [kworker/u17:2-kcryptd/253:2]
root      2610  0.1  0.0      0     0 ?        I<   21:42   0:01  [kworker/u17:12-kcryptd/253:2]
root     20124  0.1  0.0      0     0 ?        I<   21:56   0:01  [kworker/u17:1-kcryptd/253:2]

Signed-off-by: default avatarMichał Mirosław <mirq-linux@rere.qmqm.pl>
Signed-off-by: default avatarMike Snitzer <snitzer@redhat.com>
parent f349b0a3

drivers/md/dm-crypt.c

+10 −5
Original line number Diff line number Diff line
@@ -2661,6 +2661,7 @@ static int crypt_ctr_optional(struct dm_target *ti, unsigned int argc, char **ar 
static int crypt_ctr(struct dm_target *ti, unsigned int argc, char **argv)

{

	struct crypt_config *cc;

	const char *devname = dm_table_device_name(ti->table);

	int key_size;

	unsigned int align_mask;

	unsigned long long tmpll;
@@ -2806,18 +2807,22 @@ static int crypt_ctr(struct dm_target *ti, unsigned int argc, char **argv) 
	}



	ret = -ENOMEM;

	cc->io_queue = alloc_workqueue("kcryptd_io", WQ_HIGHPRI | WQ_CPU_INTENSIVE | WQ_MEM_RECLAIM, 1);

	cc->io_queue = alloc_workqueue("kcryptd_io/%s",

				       WQ_HIGHPRI | WQ_CPU_INTENSIVE | WQ_MEM_RECLAIM,

				       1, devname);

	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_HIGHPRI | WQ_CPU_INTENSIVE | WQ_MEM_RECLAIM, 1);

		cc->crypt_queue = alloc_workqueue("kcryptd/%s",

						  WQ_HIGHPRI | WQ_CPU_INTENSIVE | WQ_MEM_RECLAIM,

						  1, devname);

	else

		cc->crypt_queue = alloc_workqueue("kcryptd",

		cc->crypt_queue = alloc_workqueue("kcryptd/%s",

						  WQ_HIGHPRI | WQ_CPU_INTENSIVE | WQ_MEM_RECLAIM | WQ_UNBOUND,

						  num_online_cpus());

						  num_online_cpus(), devname);

	if (!cc->crypt_queue) {

		ti->error = "Couldn't create kcryptd queue";

		goto bad;
@@ -2826,7 +2831,7 @@ static int crypt_ctr(struct dm_target *ti, unsigned int argc, char **argv) 
	spin_lock_init(&cc->write_thread_lock);

	cc->write_tree = RB_ROOT;



	cc->write_thread = kthread_create(dmcrypt_write, cc, "dmcrypt_write");

	cc->write_thread = kthread_create(dmcrypt_write, cc, "dmcrypt_write/%s", devname);

	if (IS_ERR(cc->write_thread)) {

		ret = PTR_ERR(cc->write_thread);

		cc->write_thread = NULL;