From: Samuel Thibault <samuel.thibault@ens-lyon.org>
To: qemu-devel@nongnu.org
Subject: Re: [Qemu-devel] [PATCH] Flush pending AIO on reboot and shutdown.
Date: Wed, 13 Aug 2008 15:06:41 +0100 [thread overview]
Message-ID: <20080813140641.GP6165@implementation.uk.xensource.com> (raw)
In-Reply-To: <20080813135941.GB17567@minantech.com>
Gleb Natapov, le Wed 13 Aug 2008 16:59:41 +0300, a écrit :
> 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 écrit :
> > > 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.
> >
> > I'm wondering: isn't that what happens with real machines?
> >
> 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 ;)
Mmm, I couldn't understand.
With real hardware, if you reboot into the bios the board is not
resetted either, and thus the interference is the same.
Samuel
next prev parent reply other threads:[~2008-08-13 14:07 UTC|newest]
Thread overview: 24+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-08-13 13:23 [Qemu-devel] [PATCH] Flush pending AIO on reboot and shutdown Gleb Natapov
2008-08-13 13:46 ` Samuel Thibault
2008-08-13 13:59 ` Gleb Natapov
2008-08-13 14:06 ` Samuel Thibault [this message]
2008-08-13 14:25 ` Gleb Natapov
2008-08-13 14:29 ` Samuel Thibault
2008-08-13 14:40 ` Avi Kivity
2008-08-13 14:41 ` Gleb Natapov
2008-08-13 16:14 ` Samuel Thibault
2008-08-13 13:52 ` Anthony Liguori
2008-08-13 14:13 ` Gleb Natapov
2008-08-13 15:07 ` Anthony Liguori
2008-08-13 15:18 ` Avi Kivity
2008-08-13 15:47 ` Anthony Liguori
2008-08-13 16:36 ` Avi Kivity
2008-08-13 15:23 ` Gleb Natapov
2008-08-13 15:53 ` Anthony Liguori
2008-08-13 18:35 ` Gleb Natapov
2008-08-13 18:40 ` Avi Kivity
2008-08-13 18:53 ` Gleb Natapov
2008-08-13 19:04 ` Anthony Liguori
2008-08-14 10:26 ` Jamie Lokier
2008-08-13 19:03 ` Anthony Liguori
2008-08-13 22:32 ` Samuel Thibault
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