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Re: [Xen-devel] [PATCH v7 2/4] xen/arm: grant: Add another entry to map MFN 1:1 in dom0 p2m

On Tue, 2014-05-20 at 09:30 +0200, Roger Pau Monnà wrote:
> Not sure I'm following what's going on here, are you saying that FreeBSD
> blkfront uses the same grant ref on two (or more) requests at the same time?

My understanding was that there were two grant refs to the same mfn,
which could happen if two threads were doing (direct?) IO to buffers
which happened to lie on the same page, or with aio etc.


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