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From: Jan Kiszka <jan.kiszka@siemens.com>
To: Paolo Bonzini <pbonzini@redhat.com>
Cc: qemu-devel <qemu-devel@nongnu.org>
Subject: Re: [Qemu-devel] scsi: lsi problems since "unit attention on reset"
Date: Mon, 26 Sep 2011 18:12:09 +0200	[thread overview]
Message-ID: <4E80A459.3030607@siemens.com> (raw)
In-Reply-To: <4E8098BB.4060103@redhat.com>

On 2011-09-26 17:22, Paolo Bonzini wrote:
> On 09/26/2011 05:10 PM, Jan Kiszka wrote:
>> And you were right: it turned out to be a driver issue. The bug sneaked
>> in while adapting the original driver to some specific differences
>> between QEMU and real HW (here: lacking compat bit support).
> 
> Cool, then we can leave in the patch I think.  I originally did it in 
> hope of detecting possible bugs with (upcoming) migration support, which 
> will use unit attention to make the guest requeue all requests on the 
> destination.  It looks like my goal has been attained.

At least for this user.

> 
> Out of curiosity, have you ever looked into (or are you interested into) 
> using multiple LUNs per target with the LSI driver?  It crashes 
> miserably for me with a page fault in the Linux ISR, and that's when I 
> started using another device. :)

"Unfortunately", I haven't been confronted with such a requirement so
far. :)

Jan

-- 
Siemens AG, Corporate Technology, CT T DE IT 1
Corporate Competence Center Embedded Linux

      reply	other threads:[~2011-09-26 16:12 UTC|newest]

Thread overview: 9+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2011-09-26  7:27 [Qemu-devel] scsi: lsi problems since "unit attention on reset" Jan Kiszka
2011-09-26  7:50 ` Paolo Bonzini
2011-09-26  9:23   ` Jan Kiszka
2011-09-26  9:49     ` Paolo Bonzini
2011-09-26 10:26       ` Jan Kiszka
2011-09-26 11:00         ` Paolo Bonzini
2011-09-26 15:10         ` Jan Kiszka
2011-09-26 15:22           ` Paolo Bonzini
2011-09-26 16:12             ` Jan Kiszka [this message]

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