From 21037b8c2258ec40de3b31be9ced43ceb3b784f7 Mon Sep 17 00:00:00 2001 From: Chuck Lever Date: Tue, 5 Oct 2021 10:17:59 -0400 Subject: xprtrdma: Provide a buffer to pad Write chunks of unaligned length This is a buffer to be left persistently registered while a connection is up. Connection tear-down will automatically DMA-unmap, invalidate, and dereg the MR. A persistently registered buffer is lower in cost to provide, and it can never be coalesced into the RDMA segment that carries the data payload. An RPC that provisions a Write chunk with a non-aligned length now uses this MR rather than the tail buffer of the RPC's rq_rcv_buf. Reviewed-By: Tom Talpey Signed-off-by: Chuck Lever Signed-off-by: Trond Myklebust --- net/sunrpc/xprtrdma/verbs.c | 1 + 1 file changed, 1 insertion(+) (limited to 'net/sunrpc/xprtrdma/verbs.c') diff --git a/net/sunrpc/xprtrdma/verbs.c b/net/sunrpc/xprtrdma/verbs.c index aaec3c9be8db..c3784b7b6855 100644 --- a/net/sunrpc/xprtrdma/verbs.c +++ b/net/sunrpc/xprtrdma/verbs.c @@ -551,6 +551,7 @@ int rpcrdma_xprt_connect(struct rpcrdma_xprt *r_xprt) goto out; } rpcrdma_mrs_create(r_xprt); + frwr_wp_create(r_xprt); out: trace_xprtrdma_connect(r_xprt, rc); -- cgit