Commit 864be126 authored Aug 03, 2015 by Chuck Lever Committed by Anna Schumaker Aug 05, 2015

xprtrdma: Raise maximum payload size to one megabyte



The point of larger rsize and wsize is to reduce the per-byte cost
of memory registration and deregistration. Modern HCAs can typically
handle a megabyte or more with a single registration operation.

Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Reviewed-by: Devesh Sharma <devesh.sharma@avagotech.com>
Reviewed-By: Sagi Grimberg <sagig@mellanox.com>
Tested-by: Devesh Sharma <devesh.sharma@avagotech.com>
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>

parent 5231eb97

net/sunrpc/xprtrdma/xprt_rdma.h

+1 −2

Original line number	Diff line number	Diff line
		@@ -165,8 +165,7 @@ rdmab_to_msg(struct rpcrdma_regbuf *rb)
		* struct rpcrdma_buffer. N is the max number of outstanding requests.
		*/

		/* temporary static scatter/gather max */
		#define RPCRDMA_MAX_DATA_SEGS (64) /* max scatter/gather */
		#define RPCRDMA_MAX_DATA_SEGS ((1 * 1024 * 1024) / PAGE_SIZE)
		#define RPCRDMA_MAX_SEGS (RPCRDMA_MAX_DATA_SEGS + 2) /* head+tail = 2 */

		struct rpcrdma_buffer;