2017-02-03 0:13 GMT+03:00 Bandan Das <b...@makefile.in>: > "Matwey V. Kornilov" <matwey.korni...@gmail.com> writes: > >> 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. > > I think this means that KVM gave you a list of msrs but > when you tried to set them, it could not set all of them and hence, the > assert triggers. > > Are you using a modified kernel ? There could be something useful in the host > dmesg as well. >
I use vanilla 4.1.36 Nothing relevant to kvm in dmesg except to [ 5.265836] kvm: VM_EXIT_LOAD_IA32_PERF_GLOBAL_CTRL does not work properly. Using workaround [ 43.574791] kvm [1249]: vcpu0 unhandled wrmsr: 0x38d data 0 [ 43.580879] kvm [1249]: vcpu0 unhandled wrmsr: 0x38d data 0 [ 43.706797] kvm [1249]: vcpu0 unhandled rdmsr: 0x38d > Bandan > >>> >>> >> >> >> Hello, I've bisected the first bad commit: >> >> >> 48e1a45c3166d659f781171a47dabf4a187ed7a5 is the first bad commit >> commit 48e1a45c3166d659f781171a47dabf4a187ed7a5 >> Author: Paolo Bonzini <pbonz...@redhat.com> >> 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 <pbonz...@redhat.com> >> >> :040000 040000 5626b58f0d79261bbe8a4fb52bd2cc19c2aa86ad >> d7580353932acab9de5c3d024b3f1215eb5659dc M target-i386 -- With best regards, Matwey V. Kornilov http://blog.matwey.name xmpp://0x2...@jabber.ru