xen/9pfs: increase max ring order to 9

qemu with hax to log dma reads & writes jcs.org/2018/11/12/vfio

The max order allowed by the protocol is 9. Increase the max order
supported by QEMU to 9 to increase performance.

Signed-off-by: Stefano Stabellini <stefano.stabellini@xilinx.com>
Reviewed-by: Christian Schoenebeck <qemu_oss@crudebyte.com>
Message-Id: <20200521192627.15259-3-sstabellini@kernel.org>
Signed-off-by: Greg Kurz <groug@kaod.org>

authored by

Stefano Stabellini and committed by

Greg Kurz 5 years ago 84af7557 a4c4d462

+1 -1

1 changed file

expand all

9pfs

xen-9p-backend.c

+1 -1

hw/9pfs/xen-9p-backend.c

··· 21 21 22 22 #define VERSIONS "1" 23 23 #define MAX_RINGS 8 24 - #define MAX_RING_ORDER 8 24 + #define MAX_RING_ORDER 9 25 25 26 26 typedef struct Xen9pfsRing { 27 27 struct Xen9pfsDev *priv;