From patchwork Tue Feb 12 15:29:53 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Ursula Braun X-Patchwork-Id: 1040651 X-Patchwork-Delegate: davem@davemloft.net Return-Path: X-Original-To: patchwork-incoming-netdev@ozlabs.org Delivered-To: patchwork-incoming-netdev@ozlabs.org Authentication-Results: ozlabs.org; spf=none (mailfrom) smtp.mailfrom=vger.kernel.org (client-ip=209.132.180.67; helo=vger.kernel.org; envelope-from=netdev-owner@vger.kernel.org; receiver=) Authentication-Results: ozlabs.org; dmarc=none (p=none dis=none) header.from=linux.ibm.com Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by ozlabs.org (Postfix) with ESMTP id 43zRRq5YP7z9sMl for ; Wed, 13 Feb 2019 02:30:15 +1100 (AEDT) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1730635AbfBLPaO (ORCPT ); Tue, 12 Feb 2019 10:30:14 -0500 Received: from mx0b-001b2d01.pphosted.com ([148.163.158.5]:56186 "EHLO mx0a-001b2d01.pphosted.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1730618AbfBLPaN (ORCPT ); Tue, 12 Feb 2019 10:30:13 -0500 Received: from pps.filterd (m0098414.ppops.net [127.0.0.1]) by mx0b-001b2d01.pphosted.com (8.16.0.27/8.16.0.27) with SMTP id x1CFTE5k084359 for ; Tue, 12 Feb 2019 10:30:11 -0500 Received: from e06smtp03.uk.ibm.com (e06smtp03.uk.ibm.com [195.75.94.99]) by mx0b-001b2d01.pphosted.com with ESMTP id 2qm0hd139r-1 (version=TLSv1.2 cipher=AES256-GCM-SHA384 bits=256 verify=NOT) for ; Tue, 12 Feb 2019 10:30:11 -0500 Received: from localhost by e06smtp03.uk.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! 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Violators will be prosecuted; (version=TLSv1/SSLv3 cipher=AES256-GCM-SHA384 bits=256/256) Tue, 12 Feb 2019 15:30:06 -0000 Received: from d06av25.portsmouth.uk.ibm.com (d06av25.portsmouth.uk.ibm.com [9.149.105.61]) by b06cxnps4076.portsmouth.uk.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id x1CFU4gU39649412 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=FAIL); Tue, 12 Feb 2019 15:30:04 GMT Received: from d06av25.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 9B09C11C05C; Tue, 12 Feb 2019 15:30:04 +0000 (GMT) Received: from d06av25.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 5165C11C066; Tue, 12 Feb 2019 15:30:04 +0000 (GMT) Received: from tuxmaker.boeblingen.de.ibm.com (unknown [9.152.85.9]) by d06av25.portsmouth.uk.ibm.com (Postfix) with ESMTPS; Tue, 12 Feb 2019 15:30:04 +0000 (GMT) From: Ursula Braun To: davem@davemloft.net Cc: netdev@vger.kernel.org, linux-s390@vger.kernel.org, schwidefsky@de.ibm.com, heiko.carstens@de.ibm.com, raspl@linux.ibm.com, ubraun@linux.ibm.com Subject: [PATCH net-next 4/7] net/smc: reduce amount of status updates to peer Date: Tue, 12 Feb 2019 16:29:53 +0100 X-Mailer: git-send-email 2.16.4 In-Reply-To: <20190212152956.71041-1-ubraun@linux.ibm.com> References: <20190212152956.71041-1-ubraun@linux.ibm.com> X-TM-AS-GCONF: 00 x-cbid: 19021215-0012-0000-0000-000002F4DA61 X-IBM-AV-DETECTION: SAVI=unused REMOTE=unused XFE=unused x-cbparentid: 19021215-0013-0000-0000-0000212C4FE5 Message-Id: <20190212152956.71041-5-ubraun@linux.ibm.com> X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:, , definitions=2019-02-12_08:, , signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 priorityscore=1501 malwarescore=0 suspectscore=1 phishscore=0 bulkscore=0 spamscore=0 clxscore=1015 lowpriorityscore=0 mlxscore=0 impostorscore=0 mlxlogscore=413 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1810050000 definitions=main-1902120109 Sender: netdev-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org From: Karsten Graul In smc_cdc_msg_recv_action() the received cdc message is evaluated. To reduce the number of messaged triggered by this evaluation the logic is streamlined. For the write_blocked condition we do not need to send a response immediately. The remaining conditions can be put together into one if clause. Signed-off-by: Karsten Graul Signed-off-by: Ursula Braun --- net/smc/smc_cdc.c | 22 ++++++++-------------- 1 file changed, 8 insertions(+), 14 deletions(-) diff --git a/net/smc/smc_cdc.c b/net/smc/smc_cdc.c index 780b36c69292..28bbdb04bc35 100644 --- a/net/smc/smc_cdc.c +++ b/net/smc/smc_cdc.c @@ -273,24 +273,18 @@ static void smc_cdc_msg_recv_action(struct smc_sock *smc, smp_mb__after_atomic(); smc->sk.sk_data_ready(&smc->sk); } else { - if (conn->local_rx_ctrl.prod_flags.write_blocked || - conn->local_rx_ctrl.prod_flags.cons_curs_upd_req || - conn->local_rx_ctrl.prod_flags.urg_data_pending) { - if (conn->local_rx_ctrl.prod_flags.urg_data_pending) - conn->urg_state = SMC_URG_NOTYET; - /* force immediate tx of current consumer cursor, but - * under send_lock to guarantee arrival in seqno-order - */ - if (smc->sk.sk_state != SMC_INIT) - smc_tx_sndbuf_nonempty(conn); - } + if (conn->local_rx_ctrl.prod_flags.write_blocked) + smc->sk.sk_data_ready(&smc->sk); + if (conn->local_rx_ctrl.prod_flags.urg_data_pending) + conn->urg_state = SMC_URG_NOTYET; } - /* piggy backed tx info */ /* trigger sndbuf consumer: RDMA write into peer RMBE and CDC */ - if (diff_cons && smc_tx_prepared_sends(conn)) { + if ((diff_cons && smc_tx_prepared_sends(conn)) || + conn->local_rx_ctrl.prod_flags.cons_curs_upd_req || + conn->local_rx_ctrl.prod_flags.urg_data_pending) smc_tx_sndbuf_nonempty(conn); - } + if (diff_cons && conn->urg_tx_pend && atomic_read(&conn->peer_rmbe_space) == conn->peer_rmbe_size) { /* urg data confirmed by peer, indicate we're ready for more */