Max Parmer wrote:
>
> >Synopsis: OpenBSD guest hangs in vmd on -current host
> >Category: system
> >Environment:
> System : OpenBSD 6.1
> Details : OpenBSD 6.1-current (GENERIC.MP) #99: Mon Jul 17 16:53:49
> MDT 2017
>
> dera...@amd64.openbsd.org:/usr/src/sys/arch/amd64/compile/GENERIC.MP
>
> Architecture: OpenBSD.amd64
> Machine : amd64
> >Description:
> When running an OpenBSD guest under vmd after a short time the guest
> will hang, the
> corresponding vmd process will hit and stay at 99.9% CPU usage.
>
> Examination with ktrace shows a pattern similar to the past reports
> from tedu@[1] and
> Gregor Best[2] with the process spinning on kevent and gettime, excerpt:
> 15607 vmd RET kevent 1
> 15607 vmd CALL clock_gettime(CLOCK_MONOTONIC,0x121dae4dbd20)
>
> 15607 vmd STRU struct timespec { 20180.643241450 }
>
> 15607 vmd RET clock_gettime 0
> 15607 vmd CALL kevent(5,0,0,0x121da5f22000,64,0x121dae4dbcf0)
>
> 15607 vmd STRU struct timespec { 0.002255000 }
>
> I first encountered this issue on the snapshot from Jul 15th and was
> able to reproduce
> several times under that snapshot and the subsequent snapshots from the
> 16th and 17th.
i didn't dig into vmd to see where it's spinning, but if you run vmd with env
EVENT_NOKQUEUE=1 then I haven't observed the problem.
