On 1/30/2022 4:34 AM, Namjae Jeon wrote:
To support RDMA in chelsio NICs, Reduce smb direct read/write size
to about 512KB. With this change, we have checked that a single buffer
descriptor was sent from Windows client, and intel X722 was operated at
that size.
I am guessing that the larger payload required a fast-register of a page
count which was larger than the adapter supports? Can you provide more
detail?
Also, what exactly does "single buffer descriptor from Windows client"
mean, and why is it relevant?
Confused,
Tom.
Signed-off-by: Namjae Jeon <linkinjeon@xxxxxxxxxx>
---
fs/ksmbd/transport_rdma.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/fs/ksmbd/transport_rdma.c b/fs/ksmbd/transport_rdma.c
index 3c1ec1ac0b27..ba5a22bc2e6d 100644
--- a/fs/ksmbd/transport_rdma.c
+++ b/fs/ksmbd/transport_rdma.c
@@ -80,7 +80,7 @@ static int smb_direct_max_fragmented_recv_size = 1024 * 1024;
/* The maximum single-message size which can be received */
static int smb_direct_max_receive_size = 8192;
-static int smb_direct_max_read_write_size = 1048512;
+static int smb_direct_max_read_write_size = 524224;
static int smb_direct_max_outstanding_rw_ops = 8;
