From mboxrd@z Thu Jan  1 00:00:00 1970
From: Paolo Bonzini <pbonzini@redhat.com>
Subject: Re: Bug#707257: linux-image-3.8-1-686-pae: KVM crashes with "entry
 failed, hardware error 0x80000021"
Date: Mon, 17 Jun 2013 18:07:27 +0200
Message-ID: <51BF343F.6010601@redhat.com>
References: <5194C254.4000201@sp.consulting.lsexperts.de> <1368925231.3469.98.camel@deadeye.wl.decadent.org.uk> <20130519123227.GA13375@redhat.com> <51AF27A5.5030509@sp.consulting.lsexperts.de> <20130605121024.GZ4725@redhat.com> <51AF3447.6090308@sp.consulting.lsexperts.de> <20130606064240.GR4725@redhat.com> <51B073F1.8030107@sp.consulting.lsexperts.de> <20130606114025.GC4725@redhat.com> <51B07C3F.2060104@sp.consulting.lsexperts.de> <20130609094328.GM4725@redhat.com> <51B9B3AE.2040902@sp.consulting.lsexperts.de> <51B9CC54.6070009@redhat.com> <51B9DE49.3070606@sp.consulting.lsexperts.de> <51BD05E0.5000205@sp.consulting.lsexperts.de>
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Cc: Gleb Natapov <gleb@redhat.com>,
	Ben Hutchings <ben@decadent.org.uk>, kvm@vger.kernel.org,
	707257@bugs.debian.org
To: Stefan Pietsch <stefan.pietsch@lsexperts.de>
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Il 16/06/2013 02:25, Stefan Pietsch ha scritto:
> Bisecting leads to
> 
> git bisect bad 378a8b099fc207ddcb91b19a8c1457667e0af398
> git bisect good 007a3b547512d69f67ceb9641796d64552bd337e
> git bisect good 1f3141e80b149e7215313dff29e9a0c47811b1d1
> git bisect good 286da4156dc65c8a054580fdd96b7709132dce8d
> git bisect bad 25391454e73e3156202264eb3c473825afe4bc94
> git bisect good 218e763f458c44f30041c1b48b4371e130fd4317
> 
> 
> first bad commit: [25391454e73e3156202264eb3c473825afe4bc94]
> KVM: VMX: don't clobber segment AR of unusable segments.
> 
> 25391454e73e3156202264eb3c473825afe4bc94
> emulate_invalid_guest_state=0 -> hangs and shows "KVM: entry failed"
> emulate_invalid_guest_state=1 -> hangs
> 
> Please note, I had to compile some revisions with
> 3f0c3d0bb2bcc4b88b22452a7cf0073ee9a0f1e6 applied, caused by
> 9ae9febae9500a0a6f5ce29ee4b8d942b5332529.

Can you please execute "info registers" and "x/10i $pc" from the QEMU
monitor at the time of the hang, and include the output?  Using
"-monitor stdio" or the new GTK+ interface can help.

Also, can you run under tracing (for information on how to do this, see
http://www.linux-kvm.org/page/Tracing) and include the bottom of the log?

Thanks,

Paolo