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| From: | Paolo Bonzini |
| Subject: | Re: [Qemu-devel] virtio-scsi spec, first public draft |
| Date: | Thu, 05 May 2011 14:52:27 +0200 |
| User-agent: | Mozilla/5.0 (X11; U; Linux x86_64; en-US; rv:1.9.2.15) Gecko/20110307 Fedora/3.1.9-0.39.b3pre.fc14 Lightning/1.0b3pre Mnenhy/0.8.3 Thunderbird/3.1.9 |
On 05/05/2011 02:50 PM, Christoph Hellwig wrote:
Please don't repeat the barrier mistake done in the Xen and virtio-blk/lguest protocols. It really doesn't make sense to put this kind of strict odering in. If we really want ordering let's do it using SCSI ordered tags at least to use a standard implementation. And SCSI already supports the FUA bit to force a write to be writethrough, even if the QEMU SCSI code doesn't implement.
You're right, I reviewed the history of barriers and you can consider this gone.
Paolo
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