Messages in this thread | | | Date | Thu, 1 Aug 2013 11:10:48 +0100 | From | David Vrabel <> | Subject | Re: [Xen-devel] [PATCH 2/3] xen-blkfront: improve aproximation of required grants per request |
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On 31/07/13 16:00, Roger Pau Monne wrote: > Improve the calculation of required grants to process a request by > using nr_phys_segments instead of always assuming a request is going > to use all posible segments. > > nr_phys_segments contains the number of scatter-gather DMA addr+len > pairs, which is basically what we put at every granted page. > for_each_sg iterates over the DMA addr+len pairs and uses a grant > page for each of them.
Reviewed-by: David Vrabel <david.vrabel@citrix.com>
David
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