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@xxxxxxx +49 911 74053 688
SUSE LINUX Products GmbH, Maxfeldstr. 5, 90409 Nürnberg
GF: J. Hawn, J. Guild, F. Imendörffer, HRB 16746 (AG Nürnberg)
--
To unsubscribe from this list: send the line "unsubscribe kvm" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
