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authorSteve French <stfrench@microsoft.com>2018-06-13 17:05:58 -0500
committerSteve French <stfrench@microsoft.com>2018-06-15 02:38:08 -0500
commitd409014e4feeab486fb36b350abfc4c94de8be37 (patch)
tree23aba1406c21e7dc0d6afa7aa4769236e9829b40 /fs
parent290c3982f66ab750e85863efcb1fdd736985e5d2 (diff)
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smb3: increase initial number of credits requested to allow write
Compared to other clients the Linux smb3 client ramps up credits very slowly, taking more than 128 operations before a maximum size write could be sent (since the number of credits requested is only 2 per small operation, causing the credit limit to grow very slowly). This lack of credits initially would impact large i/o performance, when large i/o is tried early before enough credits are built up. Signed-off-by: Steve French <stfrench@gmail.com> Reviewed-by: Ronnie Sahlberg <lsahlber@redhat.com>
Diffstat (limited to 'fs')
-rw-r--r--fs/cifs/smb2pdu.c5
1 files changed, 3 insertions, 2 deletions
diff --git a/fs/cifs/smb2pdu.c b/fs/cifs/smb2pdu.c
index af032e1a3eac..328e23abd241 100644
--- a/fs/cifs/smb2pdu.c
+++ b/fs/cifs/smb2pdu.c
@@ -990,8 +990,9 @@ SMB2_sess_alloc_buffer(struct SMB2_sess_data *sess_data)
req->PreviousSessionId = sess_data->previous_session;
req->Flags = 0; /* MBZ */
- /* to enable echos and oplocks */
- req->sync_hdr.CreditRequest = cpu_to_le16(3);
+
+ /* enough to enable echos and oplocks and one max size write */
+ req->sync_hdr.CreditRequest = cpu_to_le16(130);
/* only one of SMB2 signing flags may be set in SMB2 request */
if (server->sign)