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SUNRPC: Turn off throttling of RPC slots for TCP sockets

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The theory was that we would need to grab the socket lock anyway, so we
might as well use it to gate the allocation of RPC slots for a TCP
socket.

Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
This commit is contained in:
Trond Myklebust 2018-09-03 18:41:32 -04:00
parent f05d54ecf6
commit 36bd7de949
3 changed files with 1 additions and 16 deletions
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1
include/linux/sunrpc/xprt.h
View File

@ -343,7 +343,6 @@ int xprt_reserve_xprt_cong(struct rpc_xprt *xprt, struct rpc_task *task);
void xprt_alloc_slot(struct rpc_xprt *xprt, struct rpc_task *task);
void xprt_free_slot(struct rpc_xprt *xprt,
struct rpc_rqst *req);
void xprt_lock_and_alloc_slot(struct rpc_xprt *xprt, struct rpc_task *task);
bool xprt_prepare_transmit(struct rpc_task *task);
void xprt_request_enqueue_transmit(struct rpc_task *task);
void xprt_request_enqueue_receive(struct rpc_task *task);

14
net/sunrpc/xprt.c
View File

@ -1429,20 +1429,6 @@ out_init_req:
}
EXPORT_SYMBOL_GPL(xprt_alloc_slot);
void xprt_lock_and_alloc_slot(struct rpc_xprt *xprt, struct rpc_task *task)
{
/* Note: grabbing the xprt_lock_write() ensures that we throttle
* new slot allocation if the transport is congested (i.e. when
* reconnecting a stream transport or when out of socket write
* buffer space).
*/
if (xprt_lock_write(xprt, task)) {
xprt_alloc_slot(xprt, task);
xprt_release_write(xprt, task);
}
}
EXPORT_SYMBOL_GPL(xprt_lock_and_alloc_slot);
void xprt_free_slot(struct rpc_xprt *xprt, struct rpc_rqst *req)
{
spin_lock(&xprt->reserve_lock);

2
net/sunrpc/xprtsock.c
View File

@ -2809,7 +2809,7 @@ static const struct rpc_xprt_ops xs_udp_ops = {
static const struct rpc_xprt_ops xs_tcp_ops = {
.reserve_xprt = xprt_reserve_xprt,
.release_xprt = xprt_release_xprt,
.alloc_slot = xprt_lock_and_alloc_slot,
.alloc_slot = xprt_alloc_slot,
.free_slot = xprt_free_slot,
.rpcbind = rpcb_getport_async,
.set_port = xs_set_port,