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xprtrdma: Remove rpcrdma_req::rl_buffer

Browse source 
Clean up.

There is only one remaining function, rpcrdma_buffer_put(), that
uses this field. Its caller can supply a pointer to the correct
rpcrdma_buffer, enabling the removal of an 8-byte pointer field
from a frequently-allocated shared data structure.

Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
This commit is contained in:
Chuck Lever 2019-06-19 10:33:36 -04:00 committed by Anna Schumaker
parent 6a6c6def42
commit 5828cebad1
3 changed files with 8 additions and 7 deletions
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5
net/sunrpc/xprtrdma/transport.c
View file

@ -550,8 +550,11 @@ xprt_rdma_alloc_slot(struct rpc_xprt *xprt, struct rpc_task *task)
static void
xprt_rdma_free_slot(struct rpc_xprt *xprt, struct rpc_rqst *rqst)
{
struct rpcrdma_xprt *r_xprt =
container_of(xprt, struct rpcrdma_xprt, rx_xprt);
memset(rqst, 0, sizeof(*rqst));
rpcrdma_buffer_put(rpcr_to_rdmar(rqst));
rpcrdma_buffer_put(&r_xprt->rx_buf, rpcr_to_rdmar(rqst));
rpc_wake_up_next(&xprt->backlog);
}

6
net/sunrpc/xprtrdma/verbs.c
View file

@ -1019,7 +1019,6 @@ struct rpcrdma_req *rpcrdma_req_create(struct rpcrdma_xprt *r_xprt, size_t size,
if (!req->rl_recvbuf)
goto out4;
req->rl_buffer = buffer;
INIT_LIST_HEAD(&req->rl_registered);
spin_lock(&buffer->rb_lock);
list_add(&req->rl_all, &buffer->rb_allreqs);
@ -1299,13 +1298,12 @@ rpcrdma_buffer_get(struct rpcrdma_buffer *buffers)
/**
* rpcrdma_buffer_put - Put request/reply buffers back into pool
* @buffers: buffer pool
* @req: object to return
*
*/
void
rpcrdma_buffer_put(struct rpcrdma_req *req)
void rpcrdma_buffer_put(struct rpcrdma_buffer *buffers, struct rpcrdma_req *req)
{
struct rpcrdma_buffer *buffers = req->rl_buffer;
struct rpcrdma_rep *rep = req->rl_reply;
req->rl_reply = NULL;

4
net/sunrpc/xprtrdma/xprt_rdma.h
View file

@ -320,7 +320,6 @@ struct rpcrdma_buffer;
struct rpcrdma_req {
struct list_head rl_list;
struct rpc_rqst rl_slot;
struct rpcrdma_buffer *rl_buffer;
struct rpcrdma_rep *rl_reply;
struct xdr_stream rl_stream;
struct xdr_buf rl_hdrbuf;
@ -499,7 +498,8 @@ rpcrdma_mr_recycle(struct rpcrdma_mr *mr)
}
struct rpcrdma_req *rpcrdma_buffer_get(struct rpcrdma_buffer *);
void rpcrdma_buffer_put(struct rpcrdma_req *);
void rpcrdma_buffer_put(struct rpcrdma_buffer *buffers,
struct rpcrdma_req *req);
void rpcrdma_recv_buffer_put(struct rpcrdma_rep *);
bool rpcrdma_regbuf_realloc(struct rpcrdma_regbuf *rb, size_t size,