The commit is pushed to "branch-rh7-3.10.0-327.4.5.vz7.11.x-ovz" and will
appear at https://src.openvz.org/scm/ovz/vzkernel.git
after rh7-3.10.0-327.4.5.vz7.11.2
------>
commit 852572af5f9dcb2a426f5f69952441ce9b4138d3
Author: Andrey Smetanin <asmeta...@virtuozzo.com>
Date: Tue Feb 16 13:50:12 2016 +0400
ms/kvm/eventfd: avoid loop inside irqfd_update()
The loop(for) inside irqfd_update() is unnecessary
because any other value for irq_entry.type will just trigger
schedule_work(&irqfd->inject) in irqfd_wakeup.
ms commit 351dc6477cd35136ce4668401b1b1332a62908a8.
Signed-off-by: Andrey Smetanin <asmeta...@virtuozzo.com>
Reviewed-by: Roman Kagan <rka...@virtuozzo.com>
Signed-off-by: Denis V. Lunev <d...@openvz.org>
CC: Vitaly Kuznetsov <vkuzn...@redhat.com>
CC: "K. Y. Srinivasan" <k...@microsoft.com>
CC: Gleb Natapov <g...@kernel.org>
CC: Paolo Bonzini <pbonz...@redhat.com>
Signed-off-by: Paolo Bonzini <pbonz...@redhat.com>
---
virt/kvm/eventfd.c | 13 +++++--------
1 file changed, 5 insertions(+), 8 deletions(-)
diff --git a/virt/kvm/eventfd.c b/virt/kvm/eventfd.c
index 148b239..f3a34f0 100644
--- a/virt/kvm/eventfd.c
+++ b/virt/kvm/eventfd.c
@@ -283,20 +283,17 @@ static void irqfd_update(struct kvm *kvm, struct _irqfd
*irqfd)
{
struct kvm_kernel_irq_routing_entry *e;
struct kvm_kernel_irq_routing_entry entries[KVM_NR_IRQCHIPS];
- int i, n_entries;
+ int n_entries;
n_entries = kvm_irq_map_gsi(kvm, entries, irqfd->gsi);
write_seqcount_begin(&irqfd->irq_entry_sc);
- irqfd->irq_entry.type = 0;
-
e = entries;
- for (i = 0; i < n_entries; ++i, ++e) {
- /* Only fast-path MSI. */
- if (e->type == KVM_IRQ_ROUTING_MSI)
- irqfd->irq_entry = *e;
- }
+ if (n_entries == 1)
+ irqfd->irq_entry = *e;
+ else
+ irqfd->irq_entry.type = 0;
write_seqcount_end(&irqfd->irq_entry_sc);
}
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