From: Paul Brook <paul@codesourcery.com>
To: qemu-devel@nongnu.org
Subject: Re: [Qemu-devel] AIO and savevm
Date: Sat, 2 Sep 2006 20:34:38 +0100 [thread overview]
Message-ID: <200609022034.38863.paul@codesourcery.com> (raw)
In-Reply-To: <BAY104-F10B860073EF8652878C004FF3D0@phx.gbl>
> I don't think savevm works reliably together with current AIO. At least
> some kind of AIO flushing or completion waiting should happen and then this
> should be done before any devices have started saving their state. Is this
> correct?
Correct.
Implementing it this way does mean savevm can effect the guest VM state (it
causes all pending IO to complete immediately). However this should be safe,
ie. it could occur be chance anyway, and qemu isn't deterministic to start
with.
Trying to make async AIO restartable is IMHO not worth the effort at this
point.
Paul
next prev parent reply other threads:[~2006-09-02 19:41 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-09-02 15:28 [Qemu-devel] AIO and savevm Blue Swirl
2006-09-02 19:34 ` Paul Brook [this message]
2006-09-03 8:51 ` Blue Swirl
2006-09-03 10:23 ` Paul Brook
-- strict thread matches above, loose matches on Subject: below --
2006-09-03 10:42 Blue Swirl
2006-09-03 10:49 ` Paul Brook
2006-09-03 11:14 Blue Swirl
2006-09-03 12:08 ` Paul Brook
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