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authorWei Liu <wei.liu2@citrix.com>2015-04-03 09:44:59 +0300
committerDavid Vrabel <david.vrabel@citrix.com>2015-04-15 12:56:47 +0300
commitccc9d90a9a8b5c4ad7e9708ec41f75ff9e98d61d (patch)
tree2a147c10a289a3f4283d6008708297f07df052a6 /drivers/xen/xen-scsiback.c
parent278edfc07875779a69277f6c5773ec9318a994ee (diff)
downloadlinux-ccc9d90a9a8b5c4ad7e9708ec41f75ff9e98d61d.tar.xz
xenbus_client: Extend interface to support multi-page ring
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 * scsifront/back * vtpmfront The interface is documented, as before, in xenbus_client.c. Signed-off-by: Wei Liu <wei.liu2@citrix.com> Signed-off-by: Paul Durrant <paul.durrant@citrix.com> Signed-off-by: Bob Liu <bob.liu@oracle.com> Cc: Konrad Wilk <konrad.wilk@oracle.com> Cc: Boris Ostrovsky <boris.ostrovsky@oracle.com> Signed-off-by: David Vrabel <david.vrabel@citrix.com>
Diffstat (limited to 'drivers/xen/xen-scsiback.c')
-rw-r--r--drivers/xen/xen-scsiback.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/xen/xen-scsiback.c b/drivers/xen/xen-scsiback.c
index 2eab75892c23..db42b59b0162 100644
--- a/drivers/xen/xen-scsiback.c
+++ b/drivers/xen/xen-scsiback.c
@@ -809,7 +809,7 @@ static int scsiback_init_sring(struct vscsibk_info *info, grant_ref_t ring_ref,
if (info->irq)
return -1;
- err = xenbus_map_ring_valloc(info->dev, ring_ref, &area);
+ err = xenbus_map_ring_valloc(info->dev, &ring_ref, 1, &area);
if (err)
return err;