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| author | Tejun Heo <tj@kernel.org> | 2024-02-06 04:43:41 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2024-02-23 11:25:05 +0300 |
| commit | 5ad73e1056a69d35c729df59e70d2702d66ae209 (patch) | |
| tree | abe78927ef1af2504ea621f3fce48321fd7e0985 | |
| parent | d76792931185a2e9628b7bce0bcebdbb14f2dca7 (diff) | |
| download | linux-5ad73e1056a69d35c729df59e70d2702d66ae209.tar.xz | |
Revert "workqueue: Override implicit ordered attribute in workqueue_apply_unbound_cpumask()"
commit aac8a59537dfc704ff344f1aacfd143c089ee20f upstream.
This reverts commit ca10d851b9ad0338c19e8e3089e24d565ebfffd7.
The commit allowed workqueue_apply_unbound_cpumask() to clear __WQ_ORDERED
on now removed implicitly ordered workqueues. This was incorrect in that
system-wide config change shouldn't break ordering properties of all
workqueues. The reason why apply_workqueue_attrs() path was allowed to do so
was because it was targeting the specific workqueue - either the workqueue
had WQ_SYSFS set or the workqueue user specifically tried to change
max_active, both of which indicate that the workqueue doesn't need to be
ordered.
The implicitly ordered workqueue promotion was removed by the previous
commit 3bc1e711c26b ("workqueue: Don't implicitly make UNBOUND workqueues w/
@max_active==1 ordered"). However, it didn't update this path and broke
build. Let's revert the commit which was incorrect in the first place which
also fixes build.
Signed-off-by: Tejun Heo <tj@kernel.org>
Fixes: 3bc1e711c26b ("workqueue: Don't implicitly make UNBOUND workqueues w/ @max_active==1 ordered")
Fixes: ca10d851b9ad ("workqueue: Override implicit ordered attribute in workqueue_apply_unbound_cpumask()")
Cc: stable@vger.kernel.org # v6.6+
Signed-off-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | kernel/workqueue.c | 8 |
1 files changed, 2 insertions, 6 deletions
diff --git a/kernel/workqueue.c b/kernel/workqueue.c index e6a95bb74e22..fd7b84b06d92 100644 --- a/kernel/workqueue.c +++ b/kernel/workqueue.c @@ -5793,13 +5793,9 @@ static int workqueue_apply_unbound_cpumask(const cpumask_var_t unbound_cpumask) list_for_each_entry(wq, &workqueues, list) { if (!(wq->flags & WQ_UNBOUND)) continue; - /* creating multiple pwqs breaks ordering guarantee */ - if (!list_empty(&wq->pwqs)) { - if (wq->flags & __WQ_ORDERED_EXPLICIT) - continue; - wq->flags &= ~__WQ_ORDERED; - } + if (wq->flags & __WQ_ORDERED) + continue; ctx = apply_wqattrs_prepare(wq, wq->unbound_attrs, unbound_cpumask); if (IS_ERR(ctx)) { |