This patch introduces a dedicated workqueue for irq injection
so that we are able to do some performance tuning for it.
Signed-off-by: Xie Yongji <xieyongji@xxxxxxxxxxxxx>
---
drivers/vdpa/vdpa_user/eventfd.c | 10 +++++++++-
1 file changed, 9 insertions(+), 1 deletion(-)
diff --git a/drivers/vdpa/vdpa_user/eventfd.c b/drivers/vdpa/vdpa_user/eventfd.c
index dbffddb08908..caf7d8d68ac0 100644
--- a/drivers/vdpa/vdpa_user/eventfd.c
+++ b/drivers/vdpa/vdpa_user/eventfd.c
@@ -18,6 +18,7 @@
#include "eventfd.h"
static struct workqueue_struct *vduse_irqfd_cleanup_wq;
+static struct workqueue_struct *vduse_irq_wq;
static void vduse_virqfd_shutdown(struct work_struct *work)
{
@@ -57,7 +58,7 @@ static int vduse_virqfd_wakeup(wait_queue_entry_t *wait, unsigned int mode,
__poll_t flags = key_to_poll(key);
if (flags & EPOLLIN)
- schedule_work(&virqfd->inject);
+ queue_work(vduse_irq_wq, &virqfd->inject);
if (flags & EPOLLHUP) {
spin_lock(&vq->irq_lock);
@@ -165,11 +166,18 @@ int vduse_virqfd_init(void)
if (!vduse_irqfd_cleanup_wq)
return -ENOMEM;
+ vduse_irq_wq = alloc_workqueue("vduse-irq", WQ_SYSFS | WQ_UNBOUND, 0);
+ if (!vduse_irq_wq) {
+ destroy_workqueue(vduse_irqfd_cleanup_wq);
+ return -ENOMEM;
+ }
+
return 0;
}
void vduse_virqfd_exit(void)
{
+ destroy_workqueue(vduse_irq_wq);
destroy_workqueue(vduse_irqfd_cleanup_wq);
}
--
2.11.0
