Messages in this thread | | | Date | Thu, 02 Aug 2012 14:28:16 +0800 | From | Asias He <> | Subject | Re: [PATCH V3 3/3] virtio-blk: Add bio-based IO path for virtio-blk |
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On 07/30/2012 09:44 PM, Christoph Hellwig wrote: > On Mon, Jul 30, 2012 at 09:31:06AM +0200, Paolo Bonzini wrote: >> You only need to add REQ_FLUSH support. The virtio-blk protocol does >> not support REQ_FUA, because there's no easy way to do it in userspace. > > A bio-based driver needs to handle both REQ_FLUSH and REQ_FUA as it does > not get the sequencing of REQ_FUA into REQ_FLUSH that request based drivers > can request. To what the REQ_FUA request gets translated is a different story.
I just sent out V5 to support both REQ_FLUSH AND REQ_FUA. Thanks, Christoph!
-- Asias
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