Re: [libvirt] [PATCHv2 libvirt] qemu: Issue rtc-reset-reinjection command after guest-set-time

On Tue, Aug 19, 2014 at 11:00:26AM -0600, Eric Blake wrote: > On 08/19/2014 10:57 AM, Marcelo Tosatti wrote: >> >> rtc-reset-reinjection has been introduced because certain Windows >> versions will advance the guest system time (via rtc interrupt >> reinjection). >> >> So if libvirt adjusts the guest system time via guest-set-time, >> allowing rtc interrupt reinjection to compensate for lost time, >> as well, will cause an incorrect guest system time. >> >> So you should always use the >> >> guest-set-time >> rtc-reset-reinjection >> >> pair. > > But is that true both for the 'guest-set-time' no-arg case (which tells > the guest to read the current RTC and update in-memory time > accordingly), as well as the 'guest-set-time with time argument' case > (which tells the guest to forcefully set in-memory time, then write that > time back to the RTC)? Yes.