Re: [Qemu-devel] [PATCH] kvmclock: Ensure time in migration never goes backward

[Marcin Gibuła]

> Yes, and it isn't. Any ideas why it's not? This patch really just uses
> the guest visible kvmclock time rather than the host view of it on
> migration.
>
> There is definitely something very broken on the host's side since it
> does return a smaller time than the guest exposed interface indicates.

Don't know if helps but here are example values from time_at_migration 
and s->clock from your patch.

Tested on 5 restores of saved VM that (used to) hang:

   s->clock      time_at_migration
157082235125698  157113284546655
157082235125698  157113298196976
157082235125698  157113284615117
157082235125698  157113284486601
157082235125698  157113284479740

Now, when I compare system time on guest with and without patch:

On unpatched qemu vm restores with date: Apr 18 06:56:36
On patched qemu it says: Apr 18 06:57:06

--
mg