[PATCH 5.15 058/159] ksmbd: decrease the number of SMB3 smbdirect server SGEs

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5.15-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Tom Talpey <tom@xxxxxxxxxx>

[ Upstream commit 2b4eeeaa90617c5e37da7c804c422b4e833b87b2 ]

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@xxxxxxxxxx>
Acked-by: Namjae Jeon <linkinjeon@xxxxxxxxxx>
Signed-off-by: Steve French <stfrench@xxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
 fs/ksmbd/transport_rdma.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- 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
 
 /*






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