From: "Marcin Gibuła" <m.gibula@beyond.pl>
To: agraf@suse.de
Cc: qemu-devel@nongnu.org, kvm@vger.kernel.org
Subject: Re: [Qemu-devel] [PATCH] kvmclock: Ensure time in migration never goes backward
Date: Mon, 05 May 2014 19:46:41 +0200 [thread overview]
Message-ID: <5367CE81.6030506@beyond.pl> (raw)
In-Reply-To: <1399297882-3444-1-git-send-email-agraf@suse.de>
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.
Hi,
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
same bug.
--
mg
next prev parent reply other threads:[~2014-05-05 17:47 UTC|newest]
Thread overview: 25+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-05-05 13:51 [Qemu-devel] [PATCH] kvmclock: Ensure time in migration never goes backward Alexander Graf
2014-05-05 17:46 ` Marcin Gibuła [this message]
2014-05-05 18:05 ` Alexander Graf
2014-05-05 18:26 ` Marcin Gibuła
2014-05-05 23:27 ` Marcelo Tosatti
2014-05-05 23:31 ` Marcelo Tosatti
2014-05-06 8:07 ` Marcin Gibuła
2014-05-06 7:11 ` Alexander Graf
2014-05-06 7:37 ` Marcin Gibuła
2014-05-05 23:23 ` Marcelo Tosatti
2014-05-05 23:31 ` Marcelo Tosatti
2014-05-06 7:18 ` Alexander Graf
2014-05-06 19:54 ` Marcin Gibuła
2014-05-07 23:23 ` Marcelo Tosatti
2014-05-07 23:21 ` Marcelo Tosatti
2014-05-07 23:29 ` Alexander Graf
2014-05-06 7:16 ` Alexander Graf
2014-05-07 10:04 ` Nick Thomas
2014-05-08 1:33 ` Marcelo Tosatti
2014-05-08 7:21 ` Alexander Graf
2014-05-09 2:28 ` Marcelo Tosatti
2014-05-09 11:53 ` Paolo Bonzini
2014-05-12 20:26 ` Alexander Graf
2014-05-14 7:26 ` Marcelo Tosatti
2014-05-14 6:47 ` Marcelo Tosatti
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