Re: [Qemu-devel] [PATCH 3/3] megasas: LSI Megaraid SAS emulation

[Hannes Reinecke <hare@suse.de>]

On 07/04/2011 08:34 AM, Paolo Bonzini wrote:
> On 07/04/2011 08:13 AM, Hannes Reinecke wrote:
>> On 07/03/2011 04:36 PM, Paolo Bonzini wrote:
>>> On 07/02/2011 03:50 PM, Hannes Reinecke wrote:
>>>> (And no, I will not getting into another dog-fight with Paul B.
>>>> here.
>>>> Virtio can do without bounce buffers. AHCI can. So I fail to see
>>>> why
>>>> SCSI has to rely on bounce buffers.)
>>>
>>> I agree, but I do see why a SCSI device might prefer to rely on
>>> bounce buffers for non-I/O commands. This is why in my last RFC
>>> series for vmw_pvscsi I let the device choose whether to force a
>>> bounce buffer or get an external iovec from the HBA.
>>>
>> Yes, sure, for non-I/O commands it's perfectly okay.
>> Most of which will be emulated anyway.
>> It's bounce buffers for I/O which kills performance.
>>
>> But I seem to have missed your last RFC (I'm not reading
>> qemu-devel on a
>> regular basis ...).
>> Care to send me a pointer to it?
>
> Sure,
> http://lists.gnu.org/archive/html/qemu-devel/2011-06/msg00668.html
>
Cool.
Exactly what I need.

FWIW, feel free to add my 'Acked-by' to it.

Any chance of getting them included?

Cheers,

Hannes
-- 
Dr. Hannes Reinecke		      zSeries & Storage
hare@suse.de			      +49 911 74053 688
SUSE LINUX Products GmbH, Maxfeldstr. 5, 90409 Nürnberg
GF: J. Hawn, J. Guild, F. Imendörffer, HRB 16746 (AG Nürnberg)