From 6ea34c9b78c10289846db0abeebd6b84d5aca084 Mon Sep 17 00:00:00 2001 From: Amos Kong Date: Sat, 25 May 2013 06:44:15 +0800 Subject: kvm: exclude ioeventfd from counting kvm_io_range limit We can easily reach the 1000 limit by start VM with a couple hundred I/O devices (multifunction=on). The hardcode limit already been adjusted 3 times (6 ~ 200 ~ 300 ~ 1000). In userspace, we already have maximum file descriptor to limit ioeventfd count. But kvm_io_bus devices also are used for pit, pic, ioapic, coalesced_mmio. They couldn't be limited by maximum file descriptor. Currently only ioeventfds take too much kvm_io_bus devices, so just exclude it from counting kvm_io_range limit. Also fixed one indent issue in kvm_host.h Signed-off-by: Amos Kong Reviewed-by: Stefan Hajnoczi Signed-off-by: Gleb Natapov --- virt/kvm/eventfd.c | 2 ++ 1 file changed, 2 insertions(+) (limited to 'virt/kvm/eventfd.c') diff --git a/virt/kvm/eventfd.c b/virt/kvm/eventfd.c index 64ee720b75c7..1550637d1b10 100644 --- a/virt/kvm/eventfd.c +++ b/virt/kvm/eventfd.c @@ -753,6 +753,7 @@ kvm_assign_ioeventfd(struct kvm *kvm, struct kvm_ioeventfd *args) if (ret < 0) goto unlock_fail; + kvm->buses[bus_idx]->ioeventfd_count++; list_add_tail(&p->list, &kvm->ioeventfds); mutex_unlock(&kvm->slots_lock); @@ -798,6 +799,7 @@ kvm_deassign_ioeventfd(struct kvm *kvm, struct kvm_ioeventfd *args) continue; kvm_io_bus_unregister_dev(kvm, bus_idx, &p->dev); + kvm->buses[bus_idx]->ioeventfd_count--; ioeventfd_release(p); ret = 0; break; -- cgit v1.2.3