diff options
| author | Marco Crivellari <marco.crivellari@suse.com> | 2026-01-13 14:46:30 +0300 |
|---|---|---|
| committer | Andrew Morton <akpm@linux-foundation.org> | 2026-02-01 01:22:39 +0300 |
| commit | ed0a826ce3025832c8d8b79924fd638f75b62bb7 (patch) | |
| tree | 1198faaf2357da649373c146cefa6f67f76a4490 | |
| parent | 73b2162126ff0b811929f700cec9475622c9cb11 (diff) | |
| download | linux-ed0a826ce3025832c8d8b79924fd638f75b62bb7.tar.xz | |
mm: 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 128ea9f6ccfb ("workqueue: Add system_percpu_wq and system_dfl_wq")
commit 930c2ea566af ("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.
[akpm@linux-foundation.org: fix mm/slub.c]
[akpm@linux-foundation.org: fix kmem_cache_init_late() properly, per Sebastian]
Link: https://lore.kernel.org/all/20250221112003.1dSuoGyc@linutronix.de/
Link: https://lkml.kernel.org/r/20260113114630.152942-4-marco.crivellari@suse.com
Signed-off-by: Marco Crivellari <marco.crivellari@suse.com>
Suggested-by: Tejun Heo <tj@kernel.org>
Reviewed-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Reviewed-by: Frederic Weisbecker <frederic@kernel.org>
Cc: Alexander Potapenko <glider@google.com>
Cc: David Hildenbrand <david@kernel.org>
Cc: Dmitry Vyukov <dvyukov@google.com>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Lai jiangshan <jiangshanlai@gmail.com>
Cc: "Liam R. Howlett" <Liam.Howlett@oracle.com>
Cc: Lorenzo Stoakes <lorenzo.stoakes@oracle.com>
Cc: Marco Elver <elver@google.com>
Cc: Michal Hocko <mhocko@suse.com>
Cc: Mike Rapoport <rppt@kernel.org>
Cc: Muchun Song <muchun.song@linux.dev>
Cc: Roman Gushchin <roman.gushchin@linux.dev>
Cc: Shakeel Butt <shakeel.butt@linux.dev>
Cc: Suren Baghdasaryan <surenb@google.com>
Cc: Vlastimil Babka <vbabka@suse.cz>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
| -rw-r--r-- | mm/backing-dev.c | 2 | ||||
| -rw-r--r-- | mm/slub.c | 3 | ||||
| -rw-r--r-- | mm/vmstat.c | 3 |
3 files changed, 5 insertions, 3 deletions
diff --git a/mm/backing-dev.c b/mm/backing-dev.c index 69361742893a..e319bd5e8b75 100644 --- a/mm/backing-dev.c +++ b/mm/backing-dev.c @@ -974,7 +974,7 @@ static int __init cgwb_init(void) * system_percpu_wq. Put them in a separate wq and limit concurrency. * There's no point in executing many of these in parallel. */ - cgwb_release_wq = alloc_workqueue("cgwb_release", 0, 1); + cgwb_release_wq = alloc_workqueue("cgwb_release", WQ_PERCPU, 1); if (!cgwb_release_wq) return -ENOMEM; diff --git a/mm/slub.c b/mm/slub.c index 861592ac5425..409d16695c8b 100644 --- a/mm/slub.c +++ b/mm/slub.c @@ -8542,7 +8542,8 @@ void __init kmem_cache_init(void) void __init kmem_cache_init_late(void) { - flushwq = alloc_workqueue("slub_flushwq", WQ_MEM_RECLAIM, 0); + flushwq = alloc_workqueue("slub_flushwq", WQ_MEM_RECLAIM | WQ_PERCPU, + 0); WARN_ON(!flushwq); } diff --git a/mm/vmstat.c b/mm/vmstat.c index 23e176e1d09d..99270713e0c1 100644 --- a/mm/vmstat.c +++ b/mm/vmstat.c @@ -2259,7 +2259,8 @@ void __init init_mm_internals(void) { int ret __maybe_unused; - mm_percpu_wq = alloc_workqueue("mm_percpu_wq", WQ_MEM_RECLAIM, 0); + mm_percpu_wq = alloc_workqueue("mm_percpu_wq", + WQ_MEM_RECLAIM | WQ_PERCPU, 0); #ifdef CONFIG_SMP ret = cpuhp_setup_state_nocalls(CPUHP_MM_VMSTAT_DEAD, "mm/vmstat:dead", |