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Date: Wed, 13 Aug 2008 16:59:41 +0300
From: Gleb Natapov <gleb@qumranet.com>
Subject: Re: [Qemu-devel] [PATCH] Flush pending AIO on reboot and shutdown.
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To: qemu-devel@nongnu.org

On Wed, Aug 13, 2008 at 02:46:08PM +0100, Samuel Thibault wrote:
> Gleb Natapov, le Wed 13 Aug 2008 16:23:58 +0300, a =C3=A9crit :
> > If there is outstanding IDE IO when BIOS starts execution then IDE
> > commands sent by BIOS will interfere with it and will leave IDE
> > subsystem in unpredictable state. This can happen when system reboots
> > unexpectedly without waiting for IO completion. Flushing IO before exit
> > prevents data lose.
>=20
> I'm wondering: isn't that what happens with real machines?
>=20
With shutdown yes, but why not try harder. With reboot I don't think
that in real HW you can hang IDE interface after reboot ;)

--
			Gleb.