On 04/04/2012 03:30 PM, Gleb Natapov wrote: > On Tue, Apr 03, 2012 at 01:52:26PM +0300, Gleb Natapov wrote: > > On Mon, Apr 02, 2012 at 08:54:32PM -0400, Sasha Levin wrote: > > > Hi all, > > > > > > I got the spew at the bottom of the mail in a KVM guest using the KVM tools and running trinity. > > > > > > I'm not quite sure how default_idle managed to trigger a pagefault, so that part looks odd to me. > > > > > This is not regular page fault. This is async page fault that tells the > > guest that a page, previously swapped out by hypervisor, is now swapped > > back in and it can happen while vcpu is idle. The code does not leave > > idle state properly though. We probably need to call rcu_irq_enter() > > there. Will look into it. > > > > The patch below solves it for me: > > "Page ready" async PF can kick vcpu out of idle state much like IRQ. > We need to tell RCU about this. > > Applied it, thanks. -- error compiling committee.c: too many arguments to function -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
