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svcrdma: Add a separate "max data segs macro for svcrdma 

The server and client maximum are architecturally independent.
Allow changing one without affecting the other.

Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
This commit is contained in:
Chuck Lever 2015-06-04 11:21:32 -04:00 committed by J. Bruce Fields
parent b7e0b9a965
commit 0380a3f375
3 changed files with 8 additions and 7 deletions
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7
include/linux/sunrpc/svc_rdma.h
View File

@ -172,6 +172,13 @@ struct svcxprt_rdma {
#define RDMAXPRT_SQ_PENDING 2
#define RDMAXPRT_CONN_PENDING 3
#define RPCRDMA_MAX_SVC_SEGS (64) /* server max scatter/gather */
#if RPCSVC_MAXPAYLOAD < (RPCRDMA_MAX_SVC_SEGS << PAGE_SHIFT)
#define RPCRDMA_MAXPAYLOAD RPCSVC_MAXPAYLOAD
#else
#define RPCRDMA_MAXPAYLOAD (RPCRDMA_MAX_SVC_SEGS << PAGE_SHIFT)
#endif
#define RPCRDMA_LISTEN_BACKLOG 10
/* The default ORD value is based on two outstanding full-size writes with a
* page size of 4k, or 32k * 2 ops / 4k = 16 outstanding RDMA_READ. */

2
net/sunrpc/xprtrdma/svc_rdma_transport.c
View File

@ -91,7 +91,7 @@ struct svc_xprt_class svc_rdma_class = {
.xcl_name = "rdma",
.xcl_owner = THIS_MODULE,
.xcl_ops = &svc_rdma_ops,
.xcl_max_payload = RPCSVC_MAXPAYLOAD_RDMA,
.xcl_max_payload = RPCRDMA_MAXPAYLOAD,
.xcl_ident = XPRT_TRANSPORT_RDMA,
};

6
net/sunrpc/xprtrdma/xprt_rdma.h
View File

@ -487,10 +487,4 @@ extern struct kmem_cache *svc_rdma_ctxt_cachep;
/* Workqueue created in svc_rdma.c */
extern struct workqueue_struct *svc_rdma_wq;
#if RPCSVC_MAXPAYLOAD < (RPCRDMA_MAX_DATA_SEGS << PAGE_SHIFT)
#define RPCSVC_MAXPAYLOAD_RDMA RPCSVC_MAXPAYLOAD
#else
#define RPCSVC_MAXPAYLOAD_RDMA (RPCRDMA_MAX_DATA_SEGS << PAGE_SHIFT)
#endif
#endif /* _LINUX_SUNRPC_XPRT_RDMA_H */