On Tue, Nov 29, 2011 at 04:35:34PM -0500, Eric B Munson wrote: > Changes from V3: > Include CC's on patch 3 > Drop clear flag ioctl and have the watchdog clear the flag when it is reset > > Changes from V2: > A new kvm functions defined in kvm_para.h, the only change to pvclock is the > initial flag definition > > Changes from V1: > (Thanks Marcelo) > Host code has all been moved to arch/x86/kvm/x86.c > KVM_PAUSE_GUEST was renamed to KVM_GUEST_PAUSED > > When a guest kernel is stopped by the host hypervisor it can look like a soft > lockup to the guest kernel. This false warning can mask later soft lockup > warnings which may be real. This patch series adds a method for a host > hypervisor to communicate to a guest kernel that it is being stopped. The > final patch in the series has the watchdog check this flag when it goes to > issue a soft lockup warning and skip the warning if the guest knows it was > stopped. > > It was attempted to solve this in Qemu, but the side effects of saving and > restoring the clock and tsc for each vcpu put the wall clock of the guest behind > by the amount of time of the pause. This forces a guest to have ntp running > in order to keep the wall clock accurate. Looks good to me. -- 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
