Re: [Qemu-devel] -rtc base=, migration and time jumps

2019-07-22 Thread Dr. David Alan Gilbert
* Paolo Bonzini (pbonz...@redhat.com) wrote: > So here's my understanding: "-rtc base=" says what is the RTC value > when the guest starts. This value is only used by qemu_get_timedate, > and most RTCs only use it on startup or reset. However, there are > exceptions (the PC RTC's host clock

Re: [Qemu-devel] -rtc base=, migration and time jumps

2019-07-19 Thread Paolo Bonzini
So here's my understanding: "-rtc base=" says what is the RTC value when the guest starts. This value is only used by qemu_get_timedate, and most RTCs only use it on startup or reset. However, there are exceptions (the PC RTC's host clock notifier, the ds1338's set time functionality, and all

[Qemu-devel] -rtc base=, migration and time jumps

2019-07-19 Thread Dr. David Alan Gilbert
Hi, I've just spent an unreasonable amount of time debugging an rtc issue and come to the conclusion it's probably more of a documentation problem than actual code - but I wondered if anyone disagrees. (ref: https://bugzilla.redhat.com/show_bug.cgi?id=1714143 ) The question revolves around