From: Benjamin Herrenschmidt <benh@kernel.crashing.org>
To: Alexey Kardashevskiy <aik@ozlabs.ru>
Cc: qemu-devel@nongnu.org, "Alexander Graf" <agraf@suse.de>,
qemu-ppc@nongnu.org, "Paolo Bonzini" <pbonzini@redhat.com>,
"Andreas Färber" <afaerber@suse.de>,
"Paul Mackerras" <paulus@samba.org>,
"David Gibson" <david@gibson.dropbear.id.au>
Subject: Re: [Qemu-devel] [RFC PATCH] spapr: support time base offset migration
Date: Thu, 05 Sep 2013 21:42:32 +1000 [thread overview]
Message-ID: <1378381352.4321.156.camel@pasglop> (raw)
In-Reply-To: <52285369.1040907@ozlabs.ru>
On Thu, 2013-09-05 at 19:48 +1000, Alexey Kardashevskiy wrote:
> >> I do not have pure guest timebase in QEMU and I need it on the destination.
> >> But I have host timebase + offset to calculate it. And tb_offset is already
> >> in ppc_tb_t. It looked logical to me to send the existing field and add
> >> only the missing part.
> >
> > I still don't understand. You want the guest visible timebase in the migration stream, no?
>
>
> Yes. I do not really understand the problem here (and I am not playing
> dump). Do you suggest sending just the guest timebase and do not send the
> host timebase and the offset (one number instead of two)? I can do that,
> makes sense, no problem, thanks for the idea.
No, we want to send the guest TB and the corresponding "time of day" so that
the target can adjust the TB based on how long the migration took.
Cheers,
Ben.
next prev parent reply other threads:[~2013-09-05 11:43 UTC|newest]
Thread overview: 31+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-09-03 7:31 [Qemu-devel] [RFC PATCH] spapr: support time base offset migration Alexey Kardashevskiy
2013-09-03 8:42 ` Andreas Färber
2013-09-03 9:07 ` Alexey Kardashevskiy
2013-09-03 9:22 ` Andreas Färber
2013-09-04 1:13 ` Alexey Kardashevskiy
2013-09-04 1:27 ` Alexander Graf
2013-09-05 4:30 ` David Gibson
2013-09-05 4:54 ` Alexey Kardashevskiy
2013-09-05 9:16 ` Alexander Graf
2013-09-05 9:48 ` Alexey Kardashevskiy
2013-09-05 9:58 ` Alexander Graf
2013-09-05 11:44 ` Benjamin Herrenschmidt
2013-09-05 12:37 ` Alexander Graf
2013-09-05 13:36 ` Benjamin Herrenschmidt
2013-09-05 13:39 ` Alexander Graf
2013-09-05 14:14 ` Andreas Färber
2013-09-05 14:26 ` Benjamin Herrenschmidt
2013-09-05 15:11 ` Alexander Graf
2013-09-09 2:40 ` Alexey Kardashevskiy
2013-09-09 5:50 ` Alexander Graf
2013-09-09 5:58 ` Alexey Kardashevskiy
2013-09-09 6:06 ` Alexander Graf
2013-09-09 9:29 ` Benjamin Herrenschmidt
2013-09-09 9:32 ` Alexander Graf
2013-09-09 9:38 ` Benjamin Herrenschmidt
2013-09-09 9:41 ` Alexander Graf
2013-09-13 5:20 ` David Gibson
2013-09-13 18:06 ` Alexander Graf
2013-09-05 11:42 ` Benjamin Herrenschmidt [this message]
2013-09-05 12:09 ` Alexey Kardashevskiy
2013-09-06 3:00 ` David Gibson
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