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| author |   Chuck Lever <chuck.lever@oracle.com> | 2018-10-01 14:15:56 -0400 |
|---|---|---|
| committer |   J. Bruce Fields <bfields@redhat.com> | 2018-10-29 16:58:04 -0400 |
| commit | f3c1fd0ee294abd4367dfa72d89f016c682202f0 (patch) | |
| tree | f4f92bd70943be35eb21aefd9fb9c6b2dabd71b7 /net/sunrpc/xprtrdma/svc_rdma_transport.c | |
| parent | nfsd: fix fall-through annotations (diff) | |
| download | wireguard-linux-f3c1fd0ee294abd4367dfa72d89f016c682202f0.tar.xz wireguard-linux-f3c1fd0ee294abd4367dfa72d89f016c682202f0.zip | |
svcrdma: Reduce max_send_sges
There's no need to request a large number of send SGEs because the
inline threshold already constrains the number of SGEs per Send.
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
Diffstat (limited to 'net/sunrpc/xprtrdma/svc_rdma_transport.c')
| -rw-r--r-- | net/sunrpc/xprtrdma/svc_rdma_transport.c | 10 |
1 files changed, 6 insertions, 4 deletions
diff --git a/net/sunrpc/xprtrdma/svc_rdma_transport.c b/net/sunrpc/xprtrdma/svc_rdma_transport.c index 2848cafd4a17..2f7ec8912f49 100644 --- a/net/sunrpc/xprtrdma/svc_rdma_transport.c +++ b/net/sunrpc/xprtrdma/svc_rdma_transport.c @@ -475,10 +475,12 @@ static struct svc_xprt *svc_rdma_accept(struct svc_xprt *xprt) /* Qualify the transport resource defaults with the * capabilities of this particular device */ - newxprt->sc_max_send_sges = dev->attrs.max_send_sge; - /* transport hdr, head iovec, one page list entry, tail iovec */ - if (newxprt->sc_max_send_sges < 4) { - pr_err("svcrdma: too few Send SGEs available (%d)\n", + /* Transport header, head iovec, tail iovec */ + newxprt->sc_max_send_sges = 3; + /* Add one SGE per page list entry */ + newxprt->sc_max_send_sges += svcrdma_max_req_size / PAGE_SIZE; + if (newxprt->sc_max_send_sges > dev->attrs.max_send_sge) { + pr_err("svcrdma: too few Send SGEs available (%d needed)\n", newxprt->sc_max_send_sges); goto errout; } |