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| From: | Paolo Bonzini |
| Subject: | Re: [Qemu-devel] [PATCH 3/3] megasas: LSI Megaraid SAS emulation |
| Date: | Sun, 03 Jul 2011 16:36:22 +0200 |
| User-agent: | Mozilla/5.0 (X11; U; Linux x86_64; en-US; rv:1.9.2.17) Gecko/20110428 Fedora/3.1.10-1.fc15 Mnenhy/0.8.3 Thunderbird/3.1.10 |
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
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