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ksmbd: reduce smb direct max read/write size

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ksmbd does not support more than one Buffer Descriptor V1 element in
an smbdirect protocol request. Reducing the maximum read/write size to
about 512KB allows interoperability with Windows over a wider variety
of RDMA NICs, as an interim workaround.

Reviewed-by: Tom Talpey <tom@talpey.com>
Signed-off-by: Namjae Jeon <linkinjeon@kernel.org>
Signed-off-by: Steve French <stfrench@microsoft.com>
This commit is contained in:
Namjae Jeon 2022-01-30 18:28:11 +09:00 committed by Steve French
parent 04e260948a
commit deae24b0b1
1 changed files with 1 additions and 1 deletions
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fs/ksmbd/transport_rdma.c
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@ -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;