From mboxrd@z Thu Jan  1 00:00:00 1970
From: Michael Tokarev <mjt@tls.msk.ru>
Subject: Re: [bug 1.1] -M pc-1.0 + vhost = SIGSEGV
Date: Mon, 02 Jul 2012 13:30:01 +0400
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References: <4FF06770.905@msgid.tls.msk.ru> <4FF14BA6.5070400@siemens.com>
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Cc: KVM list <kvm@vger.kernel.org>,
	"Michael S. Tsirkin" <mst@redhat.com>
To: Jan Kiszka <jan.kiszka@siemens.com>
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02.07.2012 11:20, Jan Kiszka wrote:
> On 2012-07-01 17:06, Michael Tokarev wrote:
>> When running current git version of qemu-kvm with -M pc-1.0
> 
> Just to clarify: you are talking about stable-1.1 git, not master.

Yes, as the $Subject (partially) says.

[]
>> So it looks like msix isn't initialized for -M pc-1.0 ?

And for earlier pc numbers too (eg -M pc-0.15).

> Yes, because the machine option defaults are missing here. Will send a
> patch.
> 
> Also vhost is buggy as it depends on in-kernel irqchip but doesn't check
> for it. Needs to be fixed as well.

And while we're at it, can we please take a look at the kernel
side of this bug, mentioned in other my email?  Namely, when
qemu-kvm sigsegvs in this place, the (persistent) tap device
becomes unusable and needs to be re-created (no packets are
flowing).  We've a nice "reproducer" now for this kernel issue.

(Cc'ing mst for this)

Thanks,

/mjt