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workqueue: allocate attrs for all workqueues

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The attrs are where the affinity scope lives, and a per-cpu workqueue
will need one once per-cpu becomes a scope rather than a separate
backend. Allocate them unconditionally.

wq_dump.py used a non-NULL wq->attrs as its test for an unbound
workqueue, which no longer holds; test WQ_UNBOUND there instead.

Signed-off-by: Breno Leitao <leitao@debian.org>
Signed-off-by: Tejun Heo <tj@kernel.org>
This commit is contained in:
Breno Leitao 2026-08-05 07:52:34 -07:00 committed by Tejun Heo
parent 464e454e1c
commit f784d9ce8d
2 changed files with 4 additions and 6 deletions
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8
kernel/workqueue.c
View File

@ -5902,11 +5902,9 @@ static struct workqueue_struct *__alloc_workqueue(const char *fmt,
if (!wq)
return NULL;
if (flags & WQ_UNBOUND) {
wq->attrs = alloc_workqueue_attrs_noprof();
if (!wq->attrs)
goto err_free_wq;
}
wq->attrs = alloc_workqueue_attrs_noprof();
if (!wq->attrs)
goto err_free_wq;
name_len = vsnprintf(wq->name, sizeof(wq->name), fmt, args);

2
tools/workqueue/wq_dump.py
View File

@ -205,7 +205,7 @@ for wq in list_for_each_entry('struct workqueue_struct', workqueues.address_of_(
continue
print(f'{wq.name.string_().decode():{WQ_NAME_LEN}}', end='')
if wq.attrs.value_() != 0:
if wq.flags & WQ_UNBOUND:
print(f' {cpumask_str(wq.attrs.cpumask):{ucpus_len}}', end='')
else:
print(f' {"":{ucpus_len}}', end='')