Re: [PATCH] btrfs: Drop WQ_PERCPU from ordered_flags in btrfs_init_workqueues()

[Marco Crivellari]

On Tue, Jun 2, 2026 at 4:46 AM Nathan Chancellor <nathan@xxxxxxxxxx> wrote:
>
> After commit 21c05ca88a54 ("workqueue: Add warnings and ensure one among
> WQ_PERCPU or WQ_UNBOUND is present"), there is a warning from the
> btrfs-qgroup-rescan workqueue at run time:
>
>   workqueue: btrfs-qgroup-rescan uses both WQ_PERCPU and WQ_UNBOUND. Dropped WQ_PERCPU, keeping WQ_UNBOUND.
>
> WQ_PERCPU is included in ordered_flags after commit 69635d7f4b34 ("fs:
> WQ_PERCPU added to alloc_workqueue users") and WQ_UNBOUND is set in
> alloc_ordered_workqueue(), which btrfs_alloc_ordered_workqueue() calls.
>
> Drop WQ_PERCPU from ordered_flags, as alloc_ordered_workqueue() notes
> that only WQ_FREEZABLE and WQ_MEM_RECLAIM are meaningful.

Acked-by: Marco Crivellari <marco.crivellari@xxxxxxxx>

Thanks!

--

Marco Crivellari

SUSE Labs