Commit 864be126 authored by Chuck Lever's avatar Chuck Lever Committed by Anna Schumaker

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: default avatarChuck Lever <chuck.lever@oracle.com>
Reviewed-by: default avatarDevesh Sharma <devesh.sharma@avagotech.com>
Reviewed-By: default avatarSagi Grimberg <sagig@mellanox.com>
Tested-by: default avatarDevesh Sharma <devesh.sharma@avagotech.com>
Signed-off-by: default avatarAnna Schumaker <Anna.Schumaker@Netapp.com>
parent 5231eb97
...@@ -165,8 +165,7 @@ rdmab_to_msg(struct rpcrdma_regbuf *rb) ...@@ -165,8 +165,7 @@ rdmab_to_msg(struct rpcrdma_regbuf *rb)
* struct rpcrdma_buffer. N is the max number of outstanding requests. * struct rpcrdma_buffer. N is the max number of outstanding requests.
*/ */
/* temporary static scatter/gather max */ #define RPCRDMA_MAX_DATA_SEGS ((1 * 1024 * 1024) / PAGE_SIZE)
#define RPCRDMA_MAX_DATA_SEGS (64) /* max scatter/gather */
#define RPCRDMA_MAX_SEGS (RPCRDMA_MAX_DATA_SEGS + 2) /* head+tail = 2 */ #define RPCRDMA_MAX_SEGS (RPCRDMA_MAX_DATA_SEGS + 2) /* head+tail = 2 */
struct rpcrdma_buffer; struct rpcrdma_buffer;
......
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