From patchwork Mon Nov 20 17:36:32 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Elliot Berman X-Patchwork-Id: 745417 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=quicinc.com header.i=@quicinc.com header.b="aTxztQnt" Received: from mx0a-0031df01.pphosted.com (mx0a-0031df01.pphosted.com [205.220.168.131]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 56F90F4; Mon, 20 Nov 2023 09:36:55 -0800 (PST) Received: from pps.filterd (m0279865.ppops.net [127.0.0.1]) by mx0a-0031df01.pphosted.com (8.17.1.19/8.17.1.19) with ESMTP id 3AKHHUS3010738; Mon, 20 Nov 2023 17:36:44 GMT DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=quicinc.com; h=from : date : subject : mime-version : content-type : content-transfer-encoding : message-id : references : in-reply-to : to : cc; s=qcppdkim1; bh=EbzvNwj4CIbtC07B2c+ircX4/1kNKJO9XKufiyTSIJ0=; b=aTxztQnt/n3kiYWGSnST6eD2k8dwK874GKNJptFmMhM1Gc+kY5UyQqMD4uNSzsThTlme zNpLm0jQi9F0fmq0TMzqNrCQprZVOPY4660oUPQgIhKzAaCXnKjLL4i7b/6gW5Ifp2h6 ipuYpiZyrvxumOCxXWXw7YTfyX8ph2hKIbc9Izg7V0WD1r0tU36g+s7aCVhLopmBqJC9 DevQ+oNZSWrdD5G5a9zosJer0Dl3FXFM5kFOxQdp8aNg9ns7KgAHuxQoC8u5Au/9f/M3 IpEqsinsH9AWGkGXpY5FvuOy7NL1R3UITdqcJIGgdKE2IJunnkLeoJmK/mafsyyC0mOp wA== Received: from nasanppmta02.qualcomm.com (i-global254.qualcomm.com [199.106.103.254]) by mx0a-0031df01.pphosted.com (PPS) with ESMTPS id 3uem80msb5-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Mon, 20 Nov 2023 17:36:44 +0000 Received: from nasanex01b.na.qualcomm.com (nasanex01b.na.qualcomm.com [10.46.141.250]) by NASANPPMTA02.qualcomm.com (8.17.1.5/8.17.1.5) with ESMTPS id 3AKHahSD023791 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Mon, 20 Nov 2023 17:36:43 GMT Received: from hu-eberman-lv.qualcomm.com (10.49.16.6) by nasanex01b.na.qualcomm.com (10.46.141.250) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.1118.40; Mon, 20 Nov 2023 09:36:43 -0800 From: Elliot Berman Date: Mon, 20 Nov 2023 09:36:32 -0800 Subject: [PATCH 2/2] freezer,sched: clean saved_state when restoring it during thaw Precedence: bulk X-Mailing-List: linux-arm-msm@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Message-ID: <20231120-freezer-state-multiple-thaws-v1-2-f2e1dd7ce5a2@quicinc.com> References: <20231120-freezer-state-multiple-thaws-v1-0-f2e1dd7ce5a2@quicinc.com> In-Reply-To: <20231120-freezer-state-multiple-thaws-v1-0-f2e1dd7ce5a2@quicinc.com> To: "Rafael J. Wysocki" , Pavel Machek , "Ingo Molnar" , "Peter Zijlstra (Intel)" CC: , Pavan Kondeti , "Aiqun Yu (Maria)" , , , Elliot Berman X-Mailer: b4 0.13-dev X-Originating-IP: [10.49.16.6] X-ClientProxiedBy: nalasex01c.na.qualcomm.com (10.47.97.35) To nasanex01b.na.qualcomm.com (10.46.141.250) X-QCInternal: smtphost X-Proofpoint-Virus-Version: vendor=nai engine=6200 definitions=5800 signatures=585085 X-Proofpoint-GUID: MCZ21FUTc8k25bPy33QfEDP9AkGXZS95 X-Proofpoint-ORIG-GUID: MCZ21FUTc8k25bPy33QfEDP9AkGXZS95 X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.272,Aquarius:18.0.987,Hydra:6.0.619,FMLib:17.11.176.26 definitions=2023-11-20_17,2023-11-20_01,2023-05-22_02 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 clxscore=1015 mlxlogscore=665 adultscore=0 priorityscore=1501 phishscore=0 malwarescore=0 impostorscore=0 lowpriorityscore=0 mlxscore=0 spamscore=0 bulkscore=0 suspectscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2311060000 definitions=main-2311200126 Clean saved_state after using it during thaw. Cleaning the saved_state allows us to avoid some unnecessary branches in ttwu_state_match. Signed-off-by: Elliot Berman --- kernel/freezer.c | 1 + 1 file changed, 1 insertion(+) diff --git a/kernel/freezer.c b/kernel/freezer.c index 759006a9a910..f57aaf96b829 100644 --- a/kernel/freezer.c +++ b/kernel/freezer.c @@ -187,6 +187,7 @@ static int __restore_freezer_state(struct task_struct *p, void *arg) if (state != TASK_RUNNING) { WRITE_ONCE(p->__state, state); + p->saved_state = TASK_RUNNING; return 1; }