[PATCH] virt: acrn: Add WQ_PERCPU to alloc_workqueue users

[PATCH] virt: acrn: Add WQ_PERCPU to alloc_workqueue users

[Marco Crivellari]

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.

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>
---
 drivers/virt/acrn/irqfd.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/virt/acrn/irqfd.c b/drivers/virt/acrn/irqfd.c
index 64d32c8fbf79..e3c3d078b868 100644
--- a/drivers/virt/acrn/irqfd.c
+++ b/drivers/virt/acrn/irqfd.c
@@ -206,7 +206,7 @@ int acrn_irqfd_init(struct acrn_vm *vm)
 {
 	INIT_LIST_HEAD(&vm->irqfds);
 	mutex_init(&vm->irqfds_lock);
-	vm->irqfd_wq = alloc_workqueue("acrn_irqfd-%u", 0, 0, vm->vmid);
+	vm->irqfd_wq = alloc_workqueue("acrn_irqfd-%u", WQ_PERCPU, 0, vm->vmid);
 	if (!vm->irqfd_wq)
 		return -ENOMEM;
 
-- 
2.52.0

Re: [PATCH] virt: acrn: Add WQ_PERCPU to alloc_workqueue users

[Marco Crivellari]

On Tue, Jan 13, 2026 at 2:44 PM Marco Crivellari
<marco.crivellari@suse.com> wrote:
> [...]
>  drivers/virt/acrn/irqfd.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)

Gentle ping.

Thanks!

-- 

Marco Crivellari

L3 Support Engineer

Re: [PATCH] virt: acrn: Add WQ_PERCPU to alloc_workqueue users

[Marco Crivellari]

On Tue, Jan 13, 2026 at 2:44 PM Marco Crivellari
<marco.crivellari@suse.com> wrote:
> [...]
>  drivers/virt/acrn/irqfd.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)

Hi,

Gentle ping.

Thanks!

-- 

Marco Crivellari

L3 Support Engineer

Re: [PATCH] virt: acrn: Add WQ_PERCPU to alloc_workqueue users

[Marco Crivellari]

Hi,

On Tue, Jan 13, 2026 at 2:44 PM Marco Crivellari
<marco.crivellari@suse.com> wrote:
> [...]
>  drivers/virt/acrn/irqfd.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)

Gentle ping.

Thanks!

-- 

Marco Crivellari

L3 Support Engineer

Re: [PATCH] virt: acrn: Add WQ_PERCPU to alloc_workqueue users

[Marco Crivellari]

On Tue, Jan 13, 2026 at 2:44 PM Marco Crivellari
<marco.crivellari@suse.com> wrote:
> [...]
>  drivers/virt/acrn/irqfd.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)

Hi,

Gentle ping.

Thanks!

-- 

Marco Crivellari

SUSE Labs