From: Tom Talpey <tom@talpey.com>
Date: Fri, 23 Sep 2022 21:53:56 +0000 (+0000)
Subject: ksmbd: decrease the number of SMB3 smbdirect server SGEs
X-Git-Tag: v6.1-rc1~138^2~6
X-Git-Url: https://www.infradead.org/git/?a=commitdiff_plain;h=2b4eeeaa90617c5e37da7c804c422b4e833b87b2;p=users%2Fdwmw2%2Flinux.git

ksmbd: decrease the number of SMB3 smbdirect server SGEs

The server-side SMBDirect layer requires no more than 6 send SGEs
The previous default of 8 causes ksmbd to fail on the SoftiWARP
(siw) provider, and possibly others. Additionally, large numbers
of SGEs reduces performance significantly on adapter implementations.

Signed-off-by: Tom Talpey <tom@talpey.com>
Acked-by: Namjae Jeon <linkinjeon@kernel.org>
Signed-off-by: Steve French <stfrench@microsoft.com>
---

diff --git a/fs/ksmbd/transport_rdma.c b/fs/ksmbd/transport_rdma.c
index 35b55ee94fe54..494b8e5af4b3e 100644
--- a/fs/ksmbd/transport_rdma.c
+++ b/fs/ksmbd/transport_rdma.c
@@ -32,7 +32,7 @@
 /* SMB_DIRECT negotiation timeout in seconds */
 #define SMB_DIRECT_NEGOTIATE_TIMEOUT		120
 
-#define SMB_DIRECT_MAX_SEND_SGES		8
+#define SMB_DIRECT_MAX_SEND_SGES		6
 #define SMB_DIRECT_MAX_RECV_SGES		1
 
 /*