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

[Hannes Reinecke]

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
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