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.
Paolo
