From: Jamie Lokier <jamie@shareable.org>
To: Anthony Liguori <aliguori@us.ibm.com>
Cc: Blue Swirl <blauwirbel@gmail.com>,
Jan Kiszka <jan.kiszka@siemens.com>,
Glauber Costa <glommer@redhat.com>, Dor Laor <dlaor@redhat.com>,
qemu-devel@nongnu.org
Subject: Re: [Qemu-devel] Re: [PATCH 0/5] Refactor and enhance RTC configuration
Date: Wed, 9 Sep 2009 23:23:33 +0100 [thread overview]
Message-ID: <20090909222333.GA19385@shareable.org> (raw)
In-Reply-To: <4AA7ECF8.6040504@us.ibm.com>
Anthony Liguori wrote:
> >Besides the interface thing, I'm also interesting in comments on the
> >other core idea, the selectable RTC base clock. Do we want this knob? Do
> >we want host_clock unconditionally? Or should the other RTC that
> >currently use the host time already also gain vm_clock support over the
> >time?
> >
> Hard to say. Doesn't the rtc keep track of wallclock time even on power
> off? I think using host_clock unconditionally does actually make sense.
Sometimes it's useful to offset the emulated clock for one reason or
another, hence the -startdate options. But having it run at the
correct speed is usually useful :-)
Also, sometimes (due to licenses with wallclock limits) it's useful
for a guest to not see much time pass when the guest is powered off,
although it still needs to be positive.
Will the -startdate functionality be maintained with the RTC changes?
-- Jamie
next prev parent reply other threads:[~2009-09-09 22:23 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-09-09 15:11 [Qemu-devel] [PATCH 0/5] Refactor and enhance RTC configuration Jan Kiszka
2009-09-09 15:11 ` [Qemu-devel] [PATCH 1/5] Rename QEMU_TIMER_* to QEMU_CLOCK_* Jan Kiszka
2009-09-09 15:11 ` [Qemu-devel] [PATCH 4/5] Refactor RTC command line switches Jan Kiszka
2009-09-09 15:11 ` [Qemu-devel] [PATCH 5/5] Enable host-clock-based RTC Jan Kiszka
2009-09-09 15:11 ` [Qemu-devel] [PATCH 3/5] Introduce QEMU_CLOCK_HOST Jan Kiszka
2009-09-09 15:11 ` [Qemu-devel] [PATCH 2/5] win32: Drop dead dyntick timer code Jan Kiszka
2009-09-09 15:40 ` [Qemu-devel] Re: [PATCH 0/5] Refactor and enhance RTC configuration Anthony Liguori
2009-09-09 16:24 ` Jan Kiszka
2009-09-09 16:41 ` Jan Kiszka
2009-09-09 18:03 ` Markus Armbruster
2009-09-09 17:59 ` Anthony Liguori
2009-09-09 20:00 ` Jan Kiszka
2009-09-09 20:18 ` Anthony Liguori
2009-09-09 22:23 ` Jamie Lokier [this message]
2009-09-11 8:54 ` Jan Kiszka
2009-09-13 15:08 ` Dor Laor
2009-09-13 15:37 ` Jan Kiszka
2009-09-14 13:36 ` Anthony Liguori
2009-09-14 15:40 ` Jan Kiszka
2009-09-09 17:59 ` Markus Armbruster
2009-09-10 10:41 ` Gerd Hoffmann
2009-09-09 17:33 ` Blue Swirl
2009-09-09 19:13 ` Jan Kiszka
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