Re: [Qemu-devel] Sparc guest - SCSI

[Aurelien Jarno <aurelien@aurel32.net>]

Andreas Färber a écrit :
> Am 03.08.2007 um 10:45 schrieb Nigel Horne:
> 
>> Guest: Linux/sparc
>> Host: Linux/x86
>>
>>> From time to time I am getting SCSI errors from the guest using the
>> latest CVS:
>>
>> scsi : aborting command due to timeout : pid 50803, scsi0, channel  
>> 0, id 0, lun 0 0x2a 00 00 3d be 84 00 00 08 00 esp0: Aborting command
>> esp0: dumping state
>> esp0: dma -- cond_reg<a4000211> addr<f292b000>
>> esp0: SW [sreg<00> sstep<04> ireg<18>]
>> esp0: HW reread [sreg<03> sstep<00> ireg<10>]
>> esp0: current command [tgt<00> lun<00> pphase<DATAOUT>  
>> cphase<DATAOUT>]
>> esp0: disconnected SCSI host 0 abort (pid 50803) timed out - resetting
>> SCSI bus is being reset for host 0 channel 0.
>> esp0: Resetting scsi bus
>> esp0: SCSI bus reset interrupt
>>
>> As far as I can tell the guest recovers fine, but it may be worth  
>> investigating.
> 
> I reported similar errors recently (OS X ppc host) - for me it panics  
> afterwards and does not recover fine. I got the impression that it  
> happens later if I disable the lance NIC.
> 

The problem appears when one interrupt on the SCSI controller is
triggered twice by the interrupt controller, the second interrupt
disturb the driver.

I have fixed one problem like that a few months ago in the CVS, so it
happens less often, but there is still a problem somewhere.

-- 
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