diff mbox series

dm: make workqueue names device-specific

Message ID cf80c4bae90f587cac975d69905f6dc7642a05e3.1634850725.git.mirq-linux@rere.qmqm.pl (mailing list archive)
State Accepted, archived
Delegated to: Mike Snitzer
Headers show
Series dm: make workqueue names device-specific | expand

Commit Message

Michał Mirosław Oct. 21, 2021, 9:13 p.m. UTC 
Add device number to kdmflush workqueue name to help debugging CPU usage.

Resulting `ps axfu` snippet:

root        3791  0.0  0.0      0     0 ?        I<   paź19   0:00  \_ [kdmflush/253:7]
root        3792  0.0  0.0      0     0 ?        I<   paź19   0:00  \_ [kcryptd_io/253:7]
root        3793  0.0  0.0      0     0 ?        I<   paź19   0:00  \_ [kcryptd/253:7]
root        3794  0.0  0.0      0     0 ?        S    paź19   0:00  \_ [dmcrypt_write/253:7]
root        3814  0.0  0.0      0     0 ?        I<   paź19   0:00  \_ [kdmflush/253:8]
root        3815  0.0  0.0      0     0 ?        I<   paź19   0:00  \_ [kdmflush/253:9]
root        3816  0.0  0.0      0     0 ?        I<   paź19   0:00  \_ [kdmflush/253:10]

Signed-off-by: Michał Mirosław <mirq-linux@rere.qmqm.pl>
Signed-off-by: Michał Mirosław <mirq-linux@rere.qmqm.pl>
---
 drivers/md/dm.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
diff mbox series

Patch

diff --git a/drivers/md/dm.c b/drivers/md/dm.c
index 76d9da49fda7..30830f737a9c 100644
--- a/drivers/md/dm.c
+++ b/drivers/md/dm.c
@@ -1800,7 +1800,7 @@  static struct mapped_device *alloc_dev(int minor)
 
 	format_dev_t(md->name, MKDEV(_major, minor));
 
-	md->wq = alloc_workqueue("kdmflush", WQ_MEM_RECLAIM, 0);
+	md->wq = alloc_workqueue("kdmflush/%s", WQ_MEM_RECLAIM, 0, md->name);
 	if (!md->wq)
 		goto bad;