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Re: [Qemu-devel] [PATCH] kvmclock: Ensure time in migration never goes b
Re: [Qemu-devel] [PATCH] kvmclock: Ensure time in migration never goes backward
Mon, 05 May 2014 19:46:41 +0200
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W dniu 2014-05-05 15:51, Alexander Graf pisze:
When we migrate we ask the kernel about its current belief on what the guest
time would be. However, I've seen cases where the kvmclock guest structure
indicates a time more recent than the kvm returned time.
is it possible to have kvmclock jumping forward?
Because I've reproducible case when at about 1 per 20 vm restores, VM
freezes for couple of hours and then resumes with date few hundreds
years ahead. Happens only with kvmclock.
And this patch seems to fix very similar issue so maybe it's all the
Re: [Qemu-devel] [PATCH] kvmclock: Ensure time in migration never goes backward, Marcelo Tosatti, 2014/05/05