diff options
| author | Chuck Lever <chuck.lever@oracle.com> | 2021-02-01 15:16:57 -0500 |
|---|---|---|
| committer | Chuck Lever <chuck.lever@oracle.com> | 2021-03-22 13:22:13 -0400 |
| commit | cc93ce9529a63bd67e1a64682b288db0092b34b6 (patch) | |
| tree | 27f09327f464a2e28dbe39fcde0a85ab7bdb225e /net/sunrpc/xprtrdma | |
| parent | 579900670ac770a547ff607a60c02c56a7d27bd7 (diff) | |
svcrdma: Retain the page backing rq_res.head[0].iov_base
svc_rdma_sendto() now waits for the NIC hardware to finish with
the pages backing rq_res. We still have to release the page array
in some cases, but now it's always safe to immediately re-use the
page backing rq_res's head buffer.
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Diffstat (limited to 'net/sunrpc/xprtrdma')
| -rw-r--r-- | net/sunrpc/xprtrdma/svc_rdma_sendto.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/net/sunrpc/xprtrdma/svc_rdma_sendto.c b/net/sunrpc/xprtrdma/svc_rdma_sendto.c index f093c9b536ff..056452cabc98 100644 --- a/net/sunrpc/xprtrdma/svc_rdma_sendto.c +++ b/net/sunrpc/xprtrdma/svc_rdma_sendto.c @@ -957,6 +957,11 @@ int svc_rdma_sendto(struct svc_rqst *rqstp) ret = svc_rdma_send_reply_msg(rdma, sctxt, rctxt, rqstp); if (ret < 0) goto err1; + + /* Prevent svc_xprt_release() from releasing the page backing + * rq_res.head[0].iov_base. It's no longer being accessed by + * the I/O device. */ + rqstp->rq_respages++; return 0; err2: |