Re: [libvirt] time: event poll may become un-triggerable after changing system clock.

On Tue, May 12, 2015 at 04:14:37PM +0800, zhang bo wrote:

> So, Is there any other better solution? thanks in advance. Simply don't change the system time by massive deltas. Libvirt is not going to be the only app to be affected. As you mention it is going to hit the pthread_cond_wait() call which will likely affect pretty much every single non-trivial process running on the system. I'd expect other apps have much the same problem with calculating poll sleeps too. If you need to massively change the system time this should be done at single user mode, or do a reboot. Once a system is running it should be kept synced with NTPD which will only ever change system time in very small increments and so once cause thsi problem. Regards, Daniel