[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
[Qemu-devel] [PATCH 1/9] kvm/eventfd: avoid loop inside irqfd_update()
From: |
Denis V. Lunev |
Subject: |
[Qemu-devel] [PATCH 1/9] kvm/eventfd: avoid loop inside irqfd_update() |
Date: |
Fri, 16 Oct 2015 10:07:45 +0300 |
From: Andrey Smetanin <address@hidden>
The loop(for) inside irqfd_update() is unnecessary
because any other value for irq_entry.type will just trigger
schedule_work(&irqfd->inject).
Signed-off-by: Andrey Smetanin <address@hidden>
Reviewed-by: Roman Kagan <address@hidden>
Signed-off-by: Denis V. Lunev <address@hidden>
CC: Vitaly Kuznetsov <address@hidden>
CC: "K. Y. Srinivasan" <address@hidden>
CC: Gleb Natapov <address@hidden>
CC: Paolo Bonzini <address@hidden>
---
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 b637965..518421e 100644
--- a/virt/kvm/eventfd.c
+++ b/virt/kvm/eventfd.c
@@ -238,20 +238,17 @@ static void irqfd_update(struct kvm *kvm, struct
kvm_kernel_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);
}
--
2.1.4
- [Qemu-devel] [PATCH v2 0/9] Hyper-V synthetic interrupt controller, Denis V. Lunev, 2015/10/16
- [Qemu-devel] [PATCH 2/9] kvm/eventfd: factor out kvm_notify_acked_gsi(), Denis V. Lunev, 2015/10/16
- [Qemu-devel] [PATCH 1/9] kvm/eventfd: avoid loop inside irqfd_update(),
Denis V. Lunev <=
- [Qemu-devel] [PATCH 4/9] kvm/irqchip: allow only multiple irqchip routes per GSI, Denis V. Lunev, 2015/10/16
- [Qemu-devel] [PATCH 5/9] kvm/irqchip: kvm_arch_irq_routing_update renaming split, Denis V. Lunev, 2015/10/16
- [Qemu-devel] [PATCH 3/9] kvm/eventfd: add arch-specific set_irq, Denis V. Lunev, 2015/10/16
- [Qemu-devel] [PATCH 6/9] drivers/hv: share Hyper-V SynIC constants with userspace, Denis V. Lunev, 2015/10/16
- [Qemu-devel] [PATCH 7/9] kvm/x86: split ioapic-handled and EOI exit bitmaps, Denis V. Lunev, 2015/10/16
- [Qemu-devel] [PATCH 9/9] kvm/x86: Hyper-V kvm exit, Denis V. Lunev, 2015/10/16