Re: [Xen-devel] [PATCH v5] xenbus_client: extend interface to suppurt multi-page ring

[Wei Liu <wei.liu2@xxxxxxxxxx>]

Ping?

On Sun, Nov 10, 2013 at 05:21:29PM +0000, Wei Liu wrote:
> Originally Xen PV drivers only use single-page ring to pass along
> information. This might limit the throughput between frontend and
> backend.
> 
> The patch extends Xenbus driver to support multi-page ring, which in
> general should improve throughput if ring is the bottleneck. Changes to
> various frontend / backend to adapt to the new interface are also
> included.
> 
> Affected Xen drivers:
> * blkfront/back
> * netfront/back
> * pcifront/back
> * tpmfront
> 
> The interface is documented, as before, in xenbus_client.c.
> 
> Change in V2:
> * allow ring has arbitrary number of pages <= XENBUS_MAX_RING_PAGES
> 
> Change in V3:
> * update function prototypes
> * carefully deal with types of different sizes
> 
> Change in V4:
> * use PAGE_KERNEL instead of PAGE_KERNEL_IO to avoid breakage on Arm
> 
> Change in V5:
> * fix off-by-one error and other minor glitches spotted by Mathew Daley
> 
> Signed-off-by: Wei Liu <wei.liu2@xxxxxxxxxx>
> Cc: Konrad Wilk <konrad.wilk@xxxxxxxxxx>
> Cc: David Vrabel <david.vrabel@xxxxxxxxxx>
> Cc: Boris Ostrovsky <boris.ostrovsky@xxxxxxxxxx>

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