Re: [Xen-devel] [BUG] Emulation issues

[Paul Durrant <Paul.Durrant@xxxxxxxxxx>]

> -----Original Message-----
> From: Sander Eikelenboom [mailto:linux@xxxxxxxxxxxxxx]
> Sent: 31 July 2015 12:12
> To: Paul Durrant
> Cc: Andrew Cooper; Roger Pau Monne; xen-devel
> Subject: Re: [Xen-devel] [BUG] Emulation issues
> 
> 
> Friday, July 31, 2015, 12:22:16 PM, you wrote:
> 
> >> -----Original Message-----
> >> From: xen-devel-bounces@xxxxxxxxxxxxx [mailto:xen-devel-
> >> bounces@xxxxxxxxxxxxx] On Behalf Of Paul Durrant
> >> Sent: 30 July 2015 14:20
> >> To: Andrew Cooper; Roger Pau Monne; xen-devel
> >> Subject: Re: [Xen-devel] [BUG] Emulation issues
> >>
> >> > -----Original Message-----
> >> > From: Andrew Cooper [mailto:andrew.cooper3@xxxxxxxxxx]
> >> > Sent: 30 July 2015 14:19
> >> > To: Paul Durrant; Roger Pau Monne; xen-devel
> >> > Subject: Re: [BUG] Emulation issues
> >> >
> >> > On 30/07/15 14:12, Paul Durrant wrote:
> >> > >> (XEN) io.c:165:d19v0 Weird HVM ioemulation status 1.
> >> > >> (XEN) domain_crash called from io.c:166
> >> > >> (XEN) d19v0 weird emulation state 1
> >> > >> (XEN) io.c:165:d19v0 Weird HVM ioemulation status 1.
> >> > >> (XEN) domain_crash called from io.c:166
> >> > >> (XEN) d19v0 weird emulation state 1
> >> > >> (XEN) io.c:165:d19v0 Weird HVM ioemulation status 1.
> >> > >> (XEN) domain_crash called from io.c:166
> >> > >>
> >> > > Hmm. Can't understand how that's happening... handle_pio()
> shouldn't
> >> be
> >> > called unless the state is STATE_IORESP_READY and yet the inner
> function
> >> is
> >> > hitting the default case in the switch.
> >> >
> >> > Sounds like something is changing the state between the two checks.  Is
> >> > this shared memory writeable by qemu?
> >> >
> >>
> >> No, this is the internal state. I really can't see how it's being changed.
> >>
> 
> > I've tried to replicate your test on my rig (which is an old AMD box but 
> > quite
> a big one). Even so I only seem to get about half the VMs to start. The
> shutdown works fine, and I don't see any problems on the Xen console. I'm
> using an older build of Xen but still one with my series in. I'll try pulling 
> up to
> the same commit as you and try again.
> 
> >   Paul
> 
> Hi Paul,
> 
> From what i recall it started around when Tiejun Chen's series went in.
> 

Interesting.

  Paul



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