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block: 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 128ea9f6cc ("workqueue: Add system_percpu_wq and system_dfl_wq")
   commit 930c2ea566 ("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.

Link: https://lore.kernel.org/all/20250221112003.1dSuoGyc@linutronix.de/
Suggested-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Marco Crivellari <marco.crivellari@suse.com>
Link: https://patch.msgid.link/20260223092920.60424-2-marco.crivellari@suse.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
master
Marco Crivellari 2026-02-23 10:29:19 +01:00 committed by Jens Axboe
parent 41c665aae2
commit 98236343bb
3 changed files with 3 additions and 3 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
block/bio-integrity-auto.c
View File

@ -125,7 +125,7 @@ static int __init blk_integrity_auto_init(void)
* Make it highpri CPU intensive wq with max concurrency of 1. * Make it highpri CPU intensive wq with max concurrency of 1.
*/ */
kintegrityd_wq = alloc_workqueue("kintegrityd", WQ_MEM_RECLAIM | kintegrityd_wq = alloc_workqueue("kintegrityd", WQ_MEM_RECLAIM |
WQ_HIGHPRI | WQ_CPU_INTENSIVE, 1); WQ_HIGHPRI | WQ_CPU_INTENSIVE | WQ_PERCPU, 1);
if (!kintegrityd_wq) if (!kintegrityd_wq)
panic("Failed to create kintegrityd\n"); panic("Failed to create kintegrityd\n");
return 0; return 0;

2
block/bio.c
View File

@ -1958,7 +1958,7 @@ int bioset_init(struct bio_set *bs,
if (flags & BIOSET_NEED_RESCUER) { if (flags & BIOSET_NEED_RESCUER) {
bs->rescue_workqueue = alloc_workqueue("bioset", bs->rescue_workqueue = alloc_workqueue("bioset",
WQ_MEM_RECLAIM, 0); WQ_MEM_RECLAIM | WQ_PERCPU, 0);
if (!bs->rescue_workqueue) if (!bs->rescue_workqueue)
goto bad; goto bad;
} }

2
block/blk-core.c
View File

@ -1282,7 +1282,7 @@ int __init blk_dev_init(void)
/* used for unplugging and affects IO latency/throughput - HIGHPRI */ /* used for unplugging and affects IO latency/throughput - HIGHPRI */
kblockd_workqueue = alloc_workqueue("kblockd", kblockd_workqueue = alloc_workqueue("kblockd",
WQ_MEM_RECLAIM | WQ_HIGHPRI, 0); WQ_MEM_RECLAIM | WQ_HIGHPRI | WQ_PERCPU, 0);
if (!kblockd_workqueue) if (!kblockd_workqueue)
panic("Failed to create kblockd\n"); panic("Failed to create kblockd\n");