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| author |   Trond Myklebust <trond.myklebust@hammerspace.com> | 2018-09-03 17:37:36 -0400 |
|---|---|---|
| committer | Trond Myklebust <trond.myklebust@hammerspace.com> | 2018-09-30 15:35:15 -0400 |
| commit | 75891f502f5fc70f52a01af5b924384ed4866907 (patch) | |
| tree | dae030f8d5914ed7fc87dbd7e6788804a5196a95 /net/sunrpc/xprtsock.c | |
| parent | SUNRPC: Improve latency for interactive tasks (diff) | |
| download | linux-dev-75891f502f5fc70f52a01af5b924384ed4866907.tar.xz linux-dev-75891f502f5fc70f52a01af5b924384ed4866907.zip | |
SUNRPC: Support for congestion control when queuing is enabled
Both RDMA and UDP transports require the request to get a "congestion control"
credit before they can be transmitted. Right now, this is done when
the request locks the socket. We'd like it to happen when a request attempts
to be transmitted for the first time.
In order to support retransmission of requests that already hold such
credits, we also want to ensure that they get queued first, so that we
don't deadlock with requests that have yet to obtain a credit.
Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
Diffstat (limited to 'net/sunrpc/xprtsock.c')
| -rw-r--r-- | net/sunrpc/xprtsock.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/net/sunrpc/xprtsock.c b/net/sunrpc/xprtsock.c index b8143eded4af..8831e84a058a 100644 --- a/net/sunrpc/xprtsock.c +++ b/net/sunrpc/xprtsock.c @@ -609,6 +609,10 @@ static int xs_udp_send_request(struct rpc_rqst *req, struct rpc_task *task) if (!xprt_bound(xprt)) return -ENOTCONN; + + if (!xprt_request_get_cong(xprt, req)) + return -EBADSLT; + req->rq_xtime = ktime_get(); status = xs_sendpages(transport->sock, xs_addr(xprt), xprt->addrlen, xdr, 0, true, &sent); |