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Re: [Qemu-discuss] qemu 2.8.50 Assertion `ret == cpu->kvm_msr_buf->nmsrs

From: Matwey V. Kornilov
Subject: Re: [Qemu-discuss] qemu 2.8.50 Assertion `ret == cpu->kvm_msr_buf->nmsrs' failed
Date: Thu, 2 Feb 2017 23:19:36 +0300
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:45.0) Gecko/20100101 Thunderbird/45.6.0

02.02.2017 22:36, Matwey V. Kornilov пишет:
> Hello,
> I see the following when try to run qemu from master as the following:
> # ./x86_64-softmmu/qemu-system-x86_64 --version
> QEMU emulator version 2.8.50 (v2.8.0-1006-g4e9f524)
> Copyright (c) 2003-2016 Fabrice Bellard and the QEMU Project developers
> # ./x86_64-softmmu/qemu-system-x86_64 -machine accel=kvm -nodefaults
> -no-reboot -nographic -cpu host -vga none  -kernel .build.kernel.kvm
> -initrd .build.initrd.kvm -append 'panic=1 no-kvmclock console=ttyS0
> loglevel=7' -m 1024 -serial stdio
> qemu-system-x86_64: /home/matwey/lab/qemu/target/i386/kvm.c:1849:
> kvm_put_msrs: Assertion `ret == cpu->kvm_msr_buf->nmsrs' failed.

Hello, I've bisected the first bad commit:

48e1a45c3166d659f781171a47dabf4a187ed7a5 is the first bad commit
commit 48e1a45c3166d659f781171a47dabf4a187ed7a5
Author: Paolo Bonzini <address@hidden>
Date:   Wed Mar 30 22:55:29 2016 +0200

    target-i386: assert that KVM_GET/SET_MSRS can set all requested MSRs

    This would have caught the bug in the previous patch.

    Signed-off-by: Paolo Bonzini <address@hidden>

:040000 040000 5626b58f0d79261bbe8a4fb52bd2cc19c2aa86ad
d7580353932acab9de5c3d024b3f1215eb5659dc M      target-i386

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