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Date: Thu, 29 Aug 2013 16:55:35 +0200
From: Paolo Bonzini <pbonzini@redhat.com>
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Subject: Re: [Qemu-devel] Boot Problems Windows XP guest
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To: Erik Rull <erik.rull@rdsoftware.de>
Cc: =?UTF-8?B?QmVub8OudCBDYW5ldA==?= <benoit.canet@irqsave.net>, Stefan Hajnoczi <stefanha@gmail.com>, "qemu-devel@nongnu.org" <qemu-devel@nongnu.org>

Il 29/08/2013 16:51, Erik Rull ha scritto:
>=20
>=20
>> On August 29, 2013 at 11:25 AM Beno=C3=AEt Canet <benoit.canet@irqsave=
.net> wrote:
>>
>>
>>> My commandline section is (I played with bps between 0.5 and 2.0 MB/s=
ec and
>>> iops
>>> with 1000 and 500):
>>> -drive file=3D/dev/sda2,cache=3Dnone,bps=3D548576,bps_max=3D1,iops_ma=
x=3D1000
>>> Within qemu it looks like that:
>>> QEMU 1.6.50 monitor - type 'help' for more information
>>> (qemu) info block
>>> ide0-hd0: /dev/sda2 (raw)
>>>     I/O throttling:   bps=3D548576 bps_rd=3D0 bps_wr=3D0 bps_max=3D1 =
bps_rd_max=3D0
>>> bps_wr_max=3D0 iops=3D0 iops_rd=3D0 iops_wr=3D0 iops_max=3D1000 iops_=
rd_max=3D0
>>> iops_wr_max=3D0 iops_size=3D0
>>> (qemu)
>>
>> Why did you set iops_max but not iops ?
>>
>> Best regards
>>
>> Beno=C3=AEt
>>
>=20
> Good point, I added that, but it still keeps rebooting:
> (qemu) info block
> ide0-hd0: /dev/sda2 (raw)
>     I/O throttling:   bps=3D548576 bps_rd=3D0 bps_wr=3D0 bps_max=3D1 bp=
s_rd_max=3D0
> bps_wr_max=3D0 iops=3D500 iops_rd=3D0 iops_wr=3D0 iops_max=3D500 iops_r=
d_max=3D0
> iops_wr_max=3D0 iops_size=3D0

Too bad.

But iops_max w/o iops makes sense: it means no more than 1000 iops will
be in flight at the same time.  Note that "s" is a plural in "*s_max",
not "per seconds". :)

You could try iops_max=3D1 and make it higher if it works.

Paolo