diff options
| author | Wei Liu <wei.liu2@citrix.com> | 2015-04-03 14:44:59 +0800 |
|---|---|---|
| committer | David Vrabel <david.vrabel@citrix.com> | 2015-04-15 10:56:47 +0100 |
| commit | ccc9d90a9a8b5c4ad7e9708ec41f75ff9e98d61d (patch) | |
| tree | 2a147c10a289a3f4283d6008708297f07df052a6 /drivers/xen/xen-pciback | |
| parent | 278edfc07875779a69277f6c5773ec9318a994ee (diff) | |
| download | linux-ccc9d90a9a8b5c4ad7e9708ec41f75ff9e98d61d.tar.bz2 | |
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-pciback')
| -rw-r--r-- | drivers/xen/xen-pciback/xenbus.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/xen/xen-pciback/xenbus.c b/drivers/xen/xen-pciback/xenbus.c index fe17c80ff4b7..98bc345f296e 100644 --- a/drivers/xen/xen-pciback/xenbus.c +++ b/drivers/xen/xen-pciback/xenbus.c @@ -113,7 +113,7 @@ static int xen_pcibk_do_attach(struct xen_pcibk_device *pdev, int gnt_ref, "Attaching to frontend resources - gnt_ref=%d evtchn=%d\n", gnt_ref, remote_evtchn); - err = xenbus_map_ring_valloc(pdev->xdev, gnt_ref, &vaddr); + err = xenbus_map_ring_valloc(pdev->xdev, &gnt_ref, 1, &vaddr); if (err < 0) { xenbus_dev_fatal(pdev->xdev, err, "Error mapping other domain page in ours."); |