Commit 19d32966 authored by Marco Crivellari's avatar Marco Crivellari Committed by Jens Axboe
Browse files

block/blk-throttle: Add WQ_PERCPU to alloc_workqueue users 

This continues the effort to refactor workqueue APIs, which began with
the introduction of new workqueues and a new alloc_workqueue flag in:

   commit 128ea9f6 ("workqueue: Add system_percpu_wq and system_dfl_wq")
   commit 930c2ea5 ("workqueue: Add new WQ_PERCPU flag")

The refactoring is going to alter the default behavior of
alloc_workqueue() to be unbound by default.

With the introduction of the WQ_PERCPU flag (equivalent to !WQ_UNBOUND),
any alloc_workqueue() caller that doesn’t explicitly specify WQ_UNBOUND
must now use WQ_PERCPU. For more details see the Link tag below.

In order to keep alloc_workqueue() behavior identical, explicitly request
WQ_PERCPU.

Cc: Josef Bacik <josef@toxicpanda.com>
Cc: cgroups@vger.kernel.org
Link: https://lore.kernel.org/all/20250221112003.1dSuoGyc@linutronix.de/


Suggested-by: default avatarTejun Heo <tj@kernel.org>
Signed-off-by: default avatarMarco Crivellari <marco.crivellari@suse.com>
Link: https://patch.msgid.link/20260223092920.60424-3-marco.crivellari@suse.com


Signed-off-by: default avatarJens Axboe <axboe@kernel.dk>
parent 98236343

block/blk-throttle.c

+1 −1
Original line number Diff line number Diff line
@@ -1839,7 +1839,7 @@ void blk_throtl_exit(struct gendisk *disk) 


static int __init throtl_init(void)

{

	kthrotld_workqueue = alloc_workqueue("kthrotld", WQ_MEM_RECLAIM, 0);

	kthrotld_workqueue = alloc_workqueue("kthrotld", WQ_MEM_RECLAIM | WQ_PERCPU, 0);

	if (!kthrotld_workqueue)

		panic("Failed to create kthrotld\n");