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Re: [Qemu-devel] scsi: lsi problems since "unit attention on reset"

From: Jan Kiszka
Subject: Re: [Qemu-devel] scsi: lsi problems since "unit attention on reset"
Date: Mon, 26 Sep 2011 18:12:09 +0200
User-agent: Mozilla/5.0 (X11; U; Linux i686 (x86_64); de; rv: Gecko/20080226 SUSE/ Thunderbird/ Mnenhy/

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. :)


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

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