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>
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@ -165,8 +165,7 @@ rdmab_to_msg(struct rpcrdma_regbuf *rb)
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* struct rpcrdma_buffer. N is the max number of outstanding requests.
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*/
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/* temporary static scatter/gather max */
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#define RPCRDMA_MAX_DATA_SEGS (64) /* max scatter/gather */
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#define RPCRDMA_MAX_DATA_SEGS ((1 * 1024 * 1024) / PAGE_SIZE)
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#define RPCRDMA_MAX_SEGS (RPCRDMA_MAX_DATA_SEGS + 2) /* head+tail = 2 */
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struct rpcrdma_buffer;
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