From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mx0a-001b2d01.pphosted.com (mx0a-001b2d01.pphosted.com [148.163.156.1]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id E8C951CABF; Tue, 19 Dec 2023 15:23:56 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.ibm.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=linux.ibm.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=ibm.com header.i=@ibm.com header.b="m0CqMWwv" Received: from pps.filterd (m0353729.ppops.net [127.0.0.1]) by mx0a-001b2d01.pphosted.com (8.17.1.19/8.17.1.19) with ESMTP id 3BJEgCH7016735; Tue, 19 Dec 2023 15:23:50 GMT DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ibm.com; h=date : from : to : cc : subject : message-id : references : mime-version : content-type : in-reply-to; s=pp1; bh=rZGTkydNf69G/JmroJGLXVMIAWOnNfgap9XVxfjYW7Q=; b=m0CqMWwvXWVYAVYEzi4BplVGAI3Z6FY2gtjkOIcYnDt9lI/qVhqQYz3PzVe5I4p0jt+z 5NOip33klToGvLLkei+aoUe7bZivKIE2rWNZrcqTTmSHlBV6fHMmW10ioDKwW9hGXgXH iLGeNmMW69CaMa5l3ZzQHzoTerSudqNaZJTWVJED/mqN5Wz3zdwr4bAxeNt4ksFJQQRw 1414AcjoSU/Lr8W3Tmg09pcyoIE52LXgobjkoL4qvWOxl1LaUPRjatb1i7Wg9UewwxXc zL5DUIH3MHvoXrKY2/yxzOmkDQ55vIbzPs7hvv8iddIqj6eelck0JiT1H8C5OrdKrJ9n zg== Received: from pps.reinject (localhost [127.0.0.1]) by mx0a-001b2d01.pphosted.com (PPS) with ESMTPS id 3v3d5u168v-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Tue, 19 Dec 2023 15:23:49 +0000 Received: from m0353729.ppops.net (m0353729.ppops.net [127.0.0.1]) by pps.reinject (8.17.1.5/8.17.1.5) with ESMTP id 3BJF6vgx001658; Tue, 19 Dec 2023 15:23:49 GMT Received: from ppma11.dal12v.mail.ibm.com (db.9e.1632.ip4.static.sl-reverse.com [50.22.158.219]) by mx0a-001b2d01.pphosted.com (PPS) with ESMTPS id 3v3d5u168e-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Tue, 19 Dec 2023 15:23:49 +0000 Received: from pps.filterd (ppma11.dal12v.mail.ibm.com [127.0.0.1]) by ppma11.dal12v.mail.ibm.com (8.17.1.19/8.17.1.19) with ESMTP id 3BJEV0Xj012342; Tue, 19 Dec 2023 15:23:48 GMT Received: from smtprelay05.fra02v.mail.ibm.com ([9.218.2.225]) by ppma11.dal12v.mail.ibm.com (PPS) with ESMTPS id 3v1rx1r5d4-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Tue, 19 Dec 2023 15:23:48 +0000 Received: from smtpav01.fra02v.mail.ibm.com (smtpav01.fra02v.mail.ibm.com [10.20.54.100]) by smtprelay05.fra02v.mail.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id 3BJFNkGU62128384 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Tue, 19 Dec 2023 15:23:46 GMT Received: from smtpav01.fra02v.mail.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id A75B220043; Tue, 19 Dec 2023 15:23:46 +0000 (GMT) Received: from smtpav01.fra02v.mail.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 87B4720040; Tue, 19 Dec 2023 15:23:46 +0000 (GMT) Received: from tuxmaker.boeblingen.de.ibm.com (unknown [9.152.85.9]) by smtpav01.fra02v.mail.ibm.com (Postfix) with ESMTPS; Tue, 19 Dec 2023 15:23:46 +0000 (GMT) Date: Tue, 19 Dec 2023 16:23:45 +0100 From: Alexander Gordeev To: Joe Lawrence Cc: Josh Poimboeuf , Jiri Kosina , Miroslav Benes , Petr Mladek , linux-kselftest@vger.kernel.org, live-patching@vger.kernel.org, linux-s390@vger.kernel.org Subject: Re: selftests/livepatch fails on s390 Message-ID: References: <8adb8209-d49b-4feb-5ab3-47ca4f3cefbc@redhat.com> Precedence: bulk X-Mailing-List: live-patching@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <8adb8209-d49b-4feb-5ab3-47ca4f3cefbc@redhat.com> X-TM-AS-GCONF: 00 X-Proofpoint-GUID: sW1M6UitXH19qdc7eRNMwLv-kr_KqPnu X-Proofpoint-ORIG-GUID: 1O5iQdCE9DdVWzlyuTjri7IfY9eo0LcG X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.272,Aquarius:18.0.997,Hydra:6.0.619,FMLib:17.11.176.26 definitions=2023-12-19_08,2023-12-14_01,2023-05-22_02 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 lowpriorityscore=0 suspectscore=0 spamscore=0 phishscore=0 mlxlogscore=711 clxscore=1015 impostorscore=0 bulkscore=0 malwarescore=0 priorityscore=1501 mlxscore=0 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2311290000 definitions=main-2312190115 On Tue, Dec 19, 2023 at 09:50:18AM -0500, Joe Lawrence wrote: > There is a loop_util() utility function in the script that could be used > to wait, like: > > log "$last_dmesg_msg" > loop_until "dmesg | grep -q '$last_dmesg_msg'" || > die "Can't find canary dmesg entry, buffer overrun?" > LAST_DMESG=$(dmesg | grep "$last_dmesg_msg") > > That should catch 1) short latencies and 2) buffer rollover. Maybe that > is good enough? I guess, if loop_until() would fail in case a message did not show up in meaningful time, that would be it. > -- > Joe >