Hi, I have add this bug today on 3 debian jessie guests (kernel 3.16), after migration from qemu 2.3 to qemu 2.4.
Is it a qemu bug or guest kernel 3.16 ? Regards, Alexandre Derumier ----- Mail original ----- De: "Michael Tokarev" <m...@tls.msk.ru> À: "qemu-devel" <qemu-devel@nongnu.org>, debian-ad...@lists.debian.org Cc: "Marcelo Tosatti" <mtosa...@redhat.com>, "Gleb Natapov" <g...@redhat.com> Envoyé: Jeudi 11 Juin 2015 23:42:02 Objet: Re: [Qemu-devel] Steal time MSR not set properly during live migration? 11.06.2015 23:46, Apollon Oikonomopoulos wrote: > On 15:12 Wed 03 Jun , Apollon Oikonomopoulos wrote: >> Any ideas? > > As far as I understand, there is an issue when reading the MSR on the > incoming side: there is a KVM_SET_MSRS vcpu ioctl issued by the main > thread during initialization, that causes the initial vCPU steal time > value to be set using the main thread's (and not the vCPU thread's) > run_delay. Then, upon resuming execution, kvm_arch_load_vcpu uses the > vCPU thread's run_delay to determine steal time, causing an overflow. > The issue was introduced by commit > 917367aa968fd4fef29d340e0c7ec8c608dffaab. > > For the full analysis, see https://bugs.debian.org/785557#64 and the > followup e-mail. Adding Cc's... Thanks, /mjt
