From d1e51ea6bf5f72f67937f4446a5b6d56330f9d79 Mon Sep 17 00:00:00 2001 From: Varun Prakash Date: Wed, 13 Oct 2021 19:55:09 +0530 Subject: scsi: target: cxgbit: Enable Delayed ACK Enable Delayed ACK to reduce the number of TCP ACKs. Link: https://lore.kernel.org/r/1634135109-5044-1-git-send-email-varun@chelsio.com Signed-off-by: Varun Prakash Signed-off-by: Martin K. Petersen --- drivers/target/iscsi/cxgbit/cxgbit_cm.c | 8 +++----- 1 file changed, 3 insertions(+), 5 deletions(-) (limited to 'drivers/target/iscsi/cxgbit/cxgbit_cm.c') diff --git a/drivers/target/iscsi/cxgbit/cxgbit_cm.c b/drivers/target/iscsi/cxgbit/cxgbit_cm.c index 518ded214e74..da31a308a064 100644 --- a/drivers/target/iscsi/cxgbit/cxgbit_cm.c +++ b/drivers/target/iscsi/cxgbit/cxgbit_cm.c @@ -836,11 +836,13 @@ static void cxgbit_set_tcp_window(struct cxgbit_sock *csk, struct port_info *pi) csk->rcv_win = CXGBIT_10G_RCV_WIN; if (scale) csk->rcv_win *= scale; + csk->rcv_win = min(csk->rcv_win, RCV_BUFSIZ_M << 10); #define CXGBIT_10G_SND_WIN (256 * 1024) csk->snd_win = CXGBIT_10G_SND_WIN; if (scale) csk->snd_win *= scale; + csk->snd_win = min(csk->snd_win, 512U * 1024); pr_debug("%s snd_win %d rcv_win %d\n", __func__, csk->snd_win, csk->rcv_win); @@ -1065,7 +1067,7 @@ int cxgbit_rx_data_ack(struct cxgbit_sock *csk) if (!skb) return -1; - credit_dack = RX_DACK_CHANGE_F | RX_DACK_MODE_V(1) | + credit_dack = RX_DACK_CHANGE_F | RX_DACK_MODE_V(3) | RX_CREDITS_V(csk->rx_credits); cxgb_mk_rx_data_ack(skb, len, csk->tid, csk->ctrlq_idx, @@ -1197,7 +1199,6 @@ cxgbit_pass_accept_rpl(struct cxgbit_sock *csk, struct cpl_pass_accept_req *req) if (tcph->ece && tcph->cwr) opt2 |= CCTRL_ECN_V(1); - opt2 |= RX_COALESCE_V(3); opt2 |= CONG_CNTRL_V(CONG_ALG_NEWRENO); opt2 |= T5_ISS_F; @@ -1646,9 +1647,6 @@ cxgbit_pass_establish(struct cxgbit_device *cdev, struct sk_buff *skb) csk->rcv_nxt = rcv_isn; - if (csk->rcv_win > (RCV_BUFSIZ_M << 10)) - csk->rx_credits = (csk->rcv_win - (RCV_BUFSIZ_M << 10)); - csk->snd_wscale = TCPOPT_SND_WSCALE_G(tcp_opt); cxgbit_set_emss(csk, tcp_opt); dst_confirm(csk->dst); -- cgit v1.2.3-59-g8ed1b