From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:40814) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1VEQxe-0003NK-U7 for qemu-devel@nongnu.org; Tue, 27 Aug 2013 17:38:08 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1VEQxX-0005Yu-Ae for qemu-devel@nongnu.org; Tue, 27 Aug 2013 17:38:02 -0400 Received: from mail-ob0-f174.google.com ([209.85.214.174]:37040) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1VEQxX-0005YI-4s for qemu-devel@nongnu.org; Tue, 27 Aug 2013 17:37:55 -0400 Received: by mail-ob0-f174.google.com with SMTP id wd6so5739559obb.33 for ; Tue, 27 Aug 2013 14:37:54 -0700 (PDT) MIME-Version: 1.0 In-Reply-To: <521D1AB0.1070904@redhat.com> References: <586568842.455717.1377510746935.open-xchange@email.1und1.de> <20130827073833.GB24247@stefanha-thinkpad.redhat.com> <521D0B84.8040301@rdsoftware.de> <521D1AB0.1070904@redhat.com> Date: Tue, 27 Aug 2013 16:37:54 -0500 Message-ID: From: Anthony Liguori Content-Type: multipart/alternative; boundary=e89a8fb1fbfe82b79904e4f4af9c Subject: Re: [Qemu-devel] Boot Problems Windows XP guest List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: Paolo Bonzini Cc: Stefan Hajnoczi , qemu-devel , Erik Rull --e89a8fb1fbfe82b79904e4f4af9c Content-Type: text/plain; charset=ISO-8859-1 On Aug 27, 2013 4:32 PM, "Paolo Bonzini" wrote: > > Il 27/08/2013 22:26, Erik Rull ha scritto: > > Hi Stefan, > > > > which BIOS is selected by default? > > QEMU only ships with SeaBIOS. > > > It's more a guess, there must be a > > change between 1.2.0 and 1.6.0 that prevents a simple Windows XP from > > booting completely, if the guest HDD image is placed on a SSD. On a > > rotating HDD (with the same commandline except the path to the image) it > > boots successfully. The only difference is the speed of the disk access. > > It could be a real difference, actually. An unexpectedly fast disk > might screw a sloppy driver. IIRC you're not the first person reporting > it. Stefan, do you think using block throttling could fix it (with some > trial and error)? Add cache=writethrough and I bet it'll work even on an SSD. We changed the default in that timeframe. The Windows IDE drivers can have an issue if the IRQ comes too quickly to indicate the request has completed. This is what -win2k-hack is for. That may also work here too. Regards, Anthony Liguori > > > I will try an alternative BIOS, maybe this fixes it, if not I will try > > to do some regression tests, first trying 1.4.0. > > This could help. > > Paolo > > --e89a8fb1fbfe82b79904e4f4af9c Content-Type: text/html; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable

On Aug 27, 2013 4:32 PM, "Paolo Bonzini" <= pbonzini@redhat.co= m> wrote:
>
> Il 27/08/2013 22:26, Erik Rull ha scritto:
> > Hi Stefan,
> >
> > which BIOS is selected by default?
>
> QEMU only ships with SeaBIOS.
>
> > It's more a guess, there must be a
> > change between 1.2.0 and 1.6.0 that prevents a simple Windows XP = from
> > booting completely, if the guest HDD image is placed on a SSD. On= a
> > rotating HDD (with the same commandline except the path to the im= age) it
> > boots successfully. The only difference is the speed of the disk = access.
>
> It could be a real difference, actually. =A0An unexpectedly fast disk<= br> > might screw a sloppy driver. =A0IIRC you're not the first person r= eporting
> it. =A0Stefan, do you think using block throttling could fix it (with = some
> trial and error)?


Add cache=3Dwritethrough and I bet it'll work even on an SSD.

=

We changed the default in that timeframe.=A0 The Windows IDE dri= vers can have an issue if the IRQ comes too quickly to indicate the request= has completed.=A0 This is what -win2k-hack is for.=A0 That may also work h= ere too.


Regards,


Anthony Liguori

><= br> > > I will try an alternative BIOS, maybe this fixes it, if not I wil= l try
> > to do some regression tests, first trying 1.4.0.
>
> This could help.
>
> Paolo
>
>

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