From patchwork Fri Dec 2 09:45:30 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Aiqun Yu (Maria)" X-Patchwork-Id: 13062499 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id E4D1EC47088 for ; Fri, 2 Dec 2022 09:46:31 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233150AbiLBJqb (ORCPT ); Fri, 2 Dec 2022 04:46:31 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:48578 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233160AbiLBJqM (ORCPT ); Fri, 2 Dec 2022 04:46:12 -0500 Received: from mx0a-0031df01.pphosted.com (mx0a-0031df01.pphosted.com [205.220.168.131]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 0BC8DB7DC3; Fri, 2 Dec 2022 01:45:51 -0800 (PST) Received: from pps.filterd (m0279867.ppops.net [127.0.0.1]) by mx0a-0031df01.pphosted.com (8.17.1.19/8.17.1.19) with ESMTP id 2B28DpFr024973; Fri, 2 Dec 2022 09:45:47 GMT DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=quicinc.com; h=from : to : cc : subject : date : message-id : mime-version : content-type; s=qcppdkim1; bh=qD2OTa58Jm8iziTlEZ1pWi0F/bcE3Hqs9sgHbLqTeNw=; b=ct+aIzEkYJqgjNbY3ADR1nIhSPaOEBoK08eZ3WJTRMldwZGk+u6+vtmfwsUw2oNfW9M4 jNimlcTQPWjimDxSW6VWNRhE7kWaQ075Bzz30w/1Jd6DhkfAK3rmUtp+ngK3McuKF/tn Af+kEf0AJjVnDciCKU54KM4bK8jOYP8uYzAFwmcG+nnFb+IrJZMiU1CLQZXLy/fK2aAh 995ogBYN44aTA/zgeHMLzu+TlrLaWy86bjLw0d9+xdaGfD2Q5eHs/0JHKwm/9IjLMylp JkCpSmYY7R6j3rYuAKICl1y9wtu3T4IdlmNkbX4qY3uSNjKeFL2jdeR2UIIgN/ASZQE7 hA== Received: from nasanppmta01.qualcomm.com (i-global254.qualcomm.com [199.106.103.254]) by mx0a-0031df01.pphosted.com (PPS) with ESMTPS id 3m7c220r5v-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Fri, 02 Dec 2022 09:45:47 +0000 Received: from nasanex01a.na.qualcomm.com (corens_vlan604_snip.qualcomm.com [10.53.140.1]) by NASANPPMTA01.qualcomm.com (8.17.1.5/8.17.1.5) with ESMTPS id 2B29jlEe025468 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Fri, 2 Dec 2022 09:45:47 GMT Received: from aiquny2-gv.qualcomm.com (10.80.80.8) by nasanex01a.na.qualcomm.com (10.52.223.231) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.986.36; Fri, 2 Dec 2022 01:45:45 -0800 From: Maria Yu To: CC: Maria Yu , , , , Subject: [PATCH v5 0/2] remoteproc: core: do pm relax when in Date: Fri, 2 Dec 2022 17:45:30 +0800 Message-ID: <20221202094532.2925-1-quic_aiquny@quicinc.com> X-Mailer: git-send-email 2.17.1 MIME-Version: 1.0 X-Originating-IP: [10.80.80.8] X-ClientProxiedBy: nasanex01b.na.qualcomm.com (10.46.141.250) To nasanex01a.na.qualcomm.com (10.52.223.231) X-QCInternal: smtphost X-Proofpoint-Virus-Version: vendor=nai engine=6200 definitions=5800 signatures=585085 X-Proofpoint-ORIG-GUID: aDbh-TSsStDItcJ4sw5I4ky9XzlvT3AS X-Proofpoint-GUID: aDbh-TSsStDItcJ4sw5I4ky9XzlvT3AS X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.219,Aquarius:18.0.923,Hydra:6.0.545,FMLib:17.11.122.1 definitions=2022-12-02_04,2022-12-01_01,2022-06-22_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 suspectscore=0 bulkscore=0 adultscore=0 phishscore=0 mlxscore=0 impostorscore=0 malwarescore=0 priorityscore=1501 mlxlogscore=861 spamscore=0 lowpriorityscore=0 clxscore=1015 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2210170000 definitions=main-2212020075 Precedence: bulk List-ID: X-Mailing-List: linux-arm-msm@vger.kernel.org If the remote processor is offline, no need to recover anything, and pm_relax is needed to be called. Only the first detected crash needed to be handled, so change to ordered workqueue to avoid unnecessary multi active work at the same time. This will reduce the pm_relax unnecessary concurrency. summary from some discussion points: pm_stay_awake() is needed to stop and reverse the suspend process that is currently underway. RPROC_OFFLINE state indicate there is no recovery process is in progress and no chance to do the pm_relax. Because when recovering from crash, rproc->lock is held and state is RPROC_CRASHED -> RPROC_OFFLINE -> RPROC_RUNNING, and then unlock rproc->lock. When the state is in RPROC_OFFLINE it means separate request of rproc_stop was done and no need to hold the wakeup source in crash handler to recover any more. Changelog === V5 --- Use goto out instead of directly call pm_relax and return. Suggested by Mathieu. Add new change with allocate ordered workqueue for allow only 1 active work. V4 --- Add pm relax when in RPROC_OFFLINE. previous discussion here: [1] https://lore.kernel.org/lkml/1bcd3fe8-f68d-ea7f-c0f9-68771e3421d5@quicinc.com/ Maria Yu (2): remoteproc: core: do pm relax when in RPROC_OFFLINE remoteproc: core: change to ordered workqueue for crash handler drivers/remoteproc/remoteproc_core.c | 12 +++++++++--- 1 file changed, 9 insertions(+), 3 deletions(-)