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linux-sg2042
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Merge branch 'kvm-updates/2.6.36' of git://git.kernel.org/pub/scm/virt/kvm/kvm 

* 'kvm-updates/2.6.36' of git://git.kernel.org/pub/scm/virt/kvm/kvm:
  KVM: Fix reboot on Intel hosts
  KVM: fix irqfd assign/deassign race
This commit is contained in:
Linus Torvalds 2010-09-23 17:13:17 -07:00
parent 91e71c12c5 ca242ac996
commit bcf835e52e
2 changed files with 5 additions and 2 deletions
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3
virt/kvm/eventfd.c
View File

@ -218,7 +218,6 @@ kvm_irqfd_assign(struct kvm *kvm, int fd, int gsi)
events = file->f_op->poll(file, &irqfd->pt);
list_add_tail(&irqfd->list, &kvm->irqfds.items);
spin_unlock_irq(&kvm->irqfds.lock);
/*
* Check if there was an event already pending on the eventfd
@ -227,6 +226,8 @@ kvm_irqfd_assign(struct kvm *kvm, int fd, int gsi)
if (events & POLLIN)
schedule_work(&irqfd->inject);
spin_unlock_irq(&kvm->irqfds.lock);
/*
* do not drop the file until the irqfd is fully initialized, otherwise
* we might race against the POLLHUP

4
virt/kvm/kvm_main.c
View File

@ -1970,10 +1970,12 @@ static int kvm_cpu_hotplug(struct notifier_block *notifier, unsigned long val,
asmlinkage void kvm_handle_fault_on_reboot(void)
{
if (kvm_rebooting)
if (kvm_rebooting) {
/* spin while reset goes on */
local_irq_enable();
while (true)
;
}
/* Fault while not rebooting. We want the trace. */
BUG();
}