[PATCH 04/19] smb: server: let recv_done() queue a refill when the peer is low on credits

[Namjae Jeon]

On Thu, Jan 22, 2026 at 4:51 AM Stefan Metzmacher <metze at samba.org> wrote:
>
> In captures I saw that Windows was granting 191 credits in a batch
> when its peer posted a lot of messages. We are asking for a
> credit target of 255 and 191 is 252*3/4.
>
> So we also use that logic in order to fill the
> recv buffers available to the peer.
>
> Fixes: a7eef6144c97 ("smb: server: queue post_recv_credits_work in put_recvmsg() and avoid count_avail_recvmsg")
> Cc: <stable at vger.kernel.org> # 6.18.x
> Cc: Namjae Jeon <linkinjeon at kernel.org>
> Cc: Steve French <smfrench at gmail.com>
> Cc: Tom Talpey <tom at talpey.com>
> Cc: linux-cifs at vger.kernel.org
> Cc: samba-technical at lists.samba.org
> Signed-off-by: Stefan Metzmacher <metze at samba.org>
Acked-by: Namjae Jeon <linkinjeon at kernel.org>
Thanks!