Messages in this thread |  | | | Date | Wed, 14 Dec 2011 08:49:51 -0600 | | From | Anthony Liguori <> | | Subject | Re: [PATCH 0/5 V5] Avoid soft lockup message when KVM is stopped by host |
| |
On 12/14/2011 08:39 AM, Avi Kivity wrote: > On 12/14/2011 02:16 PM, Marcelo Tosatti wrote: >>> Having this controlled from userspace means it doesn't work for SIGSTOP >>> or for long scheduling delays. What about doing this automatically >>> based on preempt notifiers? >> >> Long scheduling delays should be considered hangups from the guest >> perspective. > > Why? To the guest it looks like slow hardware, but it will interpret it > as a softlockup. > >> About SIGSTOP, that is a corner case. Unsure if its even properly supported >> by QEMU. > > It works from my experience.
We don't adjust vm_clock's offset on SIGSTOP/SIGCONT so while it may appear to work okay, QEMU isn't exhibiting the behavior it is supposed to.
Regards,
Anthony Liguori
>
|  |