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xprtrdma: Allocate RPC/RDMA send buffer separately from struct rpcrdma_req

Forráskód böngészése 
The rl_base field is currently the buffer where each RPC/RDMA call
header is built.

The inline threshold is an agreed-on size limit to for RDMA SEND
operations that pass between client and server. The sum of the
RPC/RDMA header size and the RPC header size must be less than or
equal to this threshold.

Increasing the r/wsize maximum will require MAX_SEGS to grow
significantly, but the inline threshold size won't change (both
sides agree on it). The server's inline threshold doesn't change.

Since an RPC/RDMA header can never be larger than the inline
threshold, make all RPC/RDMA header buffers the size of the
inline threshold.

Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Reviewed-by: Steve Wise <swise@opengridcomputing.com>
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
This commit is contained in:
Chuck Lever
2015-01-21 11:04:16 -05:00
committed by Anna Schumaker
szülő 0ca77dc372
commit 85275c874e
4 fájl változott, egészen pontosan 19 új sor hozzáadva és 29 régi sor törölve
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22
net/sunrpc/xprtrdma/verbs.c
Fájl megtekintése

@@ -1078,30 +1078,14 @@ rpcrdma_ep_disconnect(struct rpcrdma_ep *ep, struct rpcrdma_ia *ia)
static struct rpcrdma_req *
rpcrdma_create_req(struct rpcrdma_xprt *r_xprt)
{
struct rpcrdma_create_data_internal *cdata = &r_xprt->rx_data;
size_t wlen = cdata->inline_wsize;
struct rpcrdma_ia *ia = &r_xprt->rx_ia;
struct rpcrdma_req *req;
int rc;
rc = -ENOMEM;
req = kmalloc(sizeof(*req) + wlen, GFP_KERNEL);
req = kzalloc(sizeof(*req), GFP_KERNEL);
if (req == NULL)
goto out;
memset(req, 0, sizeof(*req));
rc = rpcrdma_register_internal(ia, req->rl_base, wlen,
&req->rl_handle, &req->rl_iov);
if (rc)
goto out_free;
return ERR_PTR(-ENOMEM);
req->rl_buffer = &r_xprt->rx_buf;
return req;
out_free:
kfree(req);
out:
return ERR_PTR(rc);
}
static struct rpcrdma_rep *
@@ -1333,7 +1317,7 @@ rpcrdma_destroy_req(struct rpcrdma_ia *ia, struct rpcrdma_req *req)
return;
rpcrdma_free_regbuf(ia, req->rl_sendbuf);
rpcrdma_deregister_internal(ia, req->rl_handle, &req->rl_iov);
rpcrdma_free_regbuf(ia, req->rl_rdmabuf);
kfree(req);
}