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[1/2] KVM: Directly inject interrupts via irqfd

Message ID 20091021143453.14955.80578.stgit@dev.haskins.net (mailing list archive)
State New, archived
Headers show

Commit Message

Gregory Haskins Oct. 21, 2009, 2:34 p.m. UTC
None
diff mbox

Patch

diff --git a/virt/kvm/eventfd.c b/virt/kvm/eventfd.c
index 30f70fd..1a529d4 100644
--- a/virt/kvm/eventfd.c
+++ b/virt/kvm/eventfd.c
@@ -49,16 +49,14 @@  struct _irqfd {
 	poll_table                pt;
 	wait_queue_head_t        *wqh;
 	wait_queue_t              wait;
-	struct work_struct        inject;
 	struct work_struct        shutdown;
 };
 
 static struct workqueue_struct *irqfd_cleanup_wq;
 
 static void
-irqfd_inject(struct work_struct *work)
+irqfd_inject(struct _irqfd *irqfd)
 {
-	struct _irqfd *irqfd = container_of(work, struct _irqfd, inject);
 	struct kvm *kvm = irqfd->kvm;
 
 	kvm_set_irq(kvm, KVM_USERSPACE_IRQ_SOURCE_ID, irqfd->gsi, 1);
@@ -80,12 +78,6 @@  irqfd_shutdown(struct work_struct *work)
 	remove_wait_queue(irqfd->wqh, &irqfd->wait);
 
 	/*
-	 * We know no new events will be scheduled at this point, so block
-	 * until all previously outstanding events have completed
-	 */
-	flush_work(&irqfd->inject);
-
-	/*
 	 * It is now safe to release the object's resources
 	 */
 	eventfd_ctx_put(irqfd->eventfd);
@@ -126,7 +118,7 @@  irqfd_wakeup(wait_queue_t *wait, unsigned mode, int sync, void *key)
 
 	if (flags & POLLIN)
 		/* An event has been signaled, inject an interrupt */
-		schedule_work(&irqfd->inject);
+		irqfd_inject(irqfd);
 
 	if (flags & POLLHUP) {
 		/* The eventfd is closing, detach from KVM */
@@ -179,7 +171,6 @@  kvm_irqfd_assign(struct kvm *kvm, int fd, int gsi)
 	irqfd->kvm = kvm;
 	irqfd->gsi = gsi;
 	INIT_LIST_HEAD(&irqfd->list);
-	INIT_WORK(&irqfd->inject, irqfd_inject);
 	INIT_WORK(&irqfd->shutdown, irqfd_shutdown);
 
 	file = eventfd_fget(fd);
@@ -214,7 +205,7 @@  kvm_irqfd_assign(struct kvm *kvm, int fd, int gsi)
 	 * before we registered, and trigger it as if we didn't miss it.
 	 */
 	if (events & POLLIN)
-		schedule_work(&irqfd->inject);
+		irqfd_inject(irqfd);
 
 	/*
 	 * do not drop the file until the irqfd is fully initialized, otherwise