From patchwork Thu Jun 1 16:45:36 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Pierre Morel X-Patchwork-Id: 13264279 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 9BD84C77B7E for ; Thu, 1 Jun 2023 16:45:49 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229648AbjFAQps (ORCPT ); Thu, 1 Jun 2023 12:45:48 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:58508 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229476AbjFAQpr (ORCPT ); Thu, 1 Jun 2023 12:45:47 -0400 Received: from mx0a-001b2d01.pphosted.com (mx0a-001b2d01.pphosted.com [148.163.156.1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 616F5D1; Thu, 1 Jun 2023 09:45:46 -0700 (PDT) Received: from pps.filterd (m0353726.ppops.net [127.0.0.1]) by mx0a-001b2d01.pphosted.com (8.17.1.19/8.17.1.19) with ESMTP id 351Gghfc012813; Thu, 1 Jun 2023 16:45:46 GMT DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ibm.com; h=from : to : cc : subject : date : message-id : in-reply-to : references : mime-version : content-transfer-encoding; s=pp1; bh=CocCYhN7bwfs0Dd45RZPjUIVTOg/X+Vcd8WCw5O32EY=; b=nd9kOlT+dZBsKf1zxF3kut98B6LY6GN6zdDihypPwWFzRPfkKhiCisSyaZVfkkuW1KhC FlNPLn/HogMct9hyE4fIUSaWkUxGAX4vDMLWV+uwxQpp0gsxTLGZTQzobUPh3loL6jYK OzSffRn87LUAHMcvxZyq87WtdTJhJKL2DrEcA8KCsguYQ9c4j0Ko+uVbOiWIcfl5Nqxj pQmc84Ns9SDPHS/cj9k9+DaHPOQ7Tmdvo4l7vjSZ2imDuXWCHyasj+61/Q6x/0IpJwxo dVRMScQphK5FE7lQlyvLw6yVCp/x9BiY2EHHOBnDDfhxlP9Rp8NGI8JVQUmEH1qDiTnF yg== Received: from pps.reinject (localhost [127.0.0.1]) by mx0a-001b2d01.pphosted.com (PPS) with ESMTPS id 3qxy36r314-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Thu, 01 Jun 2023 16:45:45 +0000 Received: from m0353726.ppops.net (m0353726.ppops.net [127.0.0.1]) by pps.reinject (8.17.1.5/8.17.1.5) with ESMTP id 351GhK9a014781; Thu, 1 Jun 2023 16:45:45 GMT Received: from ppma03ams.nl.ibm.com (62.31.33a9.ip4.static.sl-reverse.com [169.51.49.98]) by mx0a-001b2d01.pphosted.com (PPS) with ESMTPS id 3qxy36r308-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Thu, 01 Jun 2023 16:45:45 +0000 Received: from pps.filterd (ppma03ams.nl.ibm.com [127.0.0.1]) by ppma03ams.nl.ibm.com (8.17.1.19/8.17.1.19) with ESMTP id 3514pP1q022818; Thu, 1 Jun 2023 16:45:43 GMT Received: from smtprelay07.fra02v.mail.ibm.com ([9.218.2.229]) by ppma03ams.nl.ibm.com (PPS) with ESMTPS id 3qu9g52n61-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Thu, 01 Jun 2023 16:45:43 +0000 Received: from smtpav07.fra02v.mail.ibm.com (smtpav07.fra02v.mail.ibm.com [10.20.54.106]) by smtprelay07.fra02v.mail.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id 351GjdWk42336732 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Thu, 1 Jun 2023 16:45:39 GMT Received: from smtpav07.fra02v.mail.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id B6DA920040; Thu, 1 Jun 2023 16:45:39 +0000 (GMT) Received: from smtpav07.fra02v.mail.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 0F26820043; Thu, 1 Jun 2023 16:45:39 +0000 (GMT) Received: from li-c6ac47cc-293c-11b2-a85c-d421c8e4747b.ibm.com.com (unknown [9.171.12.131]) by smtpav07.fra02v.mail.ibm.com (Postfix) with ESMTP; Thu, 1 Jun 2023 16:45:38 +0000 (GMT) From: Pierre Morel To: linux-s390@vger.kernel.org Cc: frankja@linux.ibm.com, thuth@redhat.com, kvm@vger.kernel.org, imbrenda@linux.ibm.com, david@redhat.com, nrb@linux.ibm.com, nsg@linux.ibm.com, cohuck@redhat.com Subject: [kvm-unit-tests PATCH v5 1/2] s390x: sclp: treat system as single processor when read_info is NULL Date: Thu, 1 Jun 2023 18:45:36 +0200 Message-Id: <20230601164537.31769-2-pmorel@linux.ibm.com> X-Mailer: git-send-email 2.31.1 In-Reply-To: <20230601164537.31769-1-pmorel@linux.ibm.com> References: <20230601164537.31769-1-pmorel@linux.ibm.com> MIME-Version: 1.0 X-TM-AS-GCONF: 00 X-Proofpoint-ORIG-GUID: 80BGnOEIfTv0hQR_6GsHHc-LVdQs_mvV X-Proofpoint-GUID: 3Rqg12Pvrc0oLgpmzm_hvDegWFIBoPk6 X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.254,Aquarius:18.0.957,Hydra:6.0.573,FMLib:17.11.176.26 definitions=2023-06-01_08,2023-05-31_03,2023-05-22_02 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 impostorscore=0 mlxlogscore=653 phishscore=0 bulkscore=0 suspectscore=0 lowpriorityscore=0 priorityscore=1501 adultscore=0 clxscore=1015 mlxscore=0 spamscore=0 malwarescore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2304280000 definitions=main-2306010144 Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org When a test abort()s before SCLP read info is completed, the assertion on read_info in sclp_read_info() will fail. Since abort() eventually calls smp_teardown() which in turn calls sclp_get_cpu_num(), this will cause an infinite abort() chain, causing the test to hang. Fix this by considering the system single processor when read_info is missing. Signed-off-by: Pierre Morel Reviewed-by: Nico Boehr --- lib/s390x/sclp.c | 11 +++++++++-- 1 file changed, 9 insertions(+), 2 deletions(-) diff --git a/lib/s390x/sclp.c b/lib/s390x/sclp.c index acdc8a9..adf357b 100644 --- a/lib/s390x/sclp.c +++ b/lib/s390x/sclp.c @@ -119,8 +119,15 @@ void sclp_read_info(void) int sclp_get_cpu_num(void) { - assert(read_info); - return read_info->entries_cpu; + if (read_info) + return read_info->entries_cpu; + /* + * Don't abort here if read_info is NULL since abort() calls + * smp_teardown() which eventually calls this function and thus + * causes an infinite abort() chain, causing the test to hang. + * Since we obviously have at least one CPU, just return one. + */ + return 1; } CPUEntry *sclp_get_cpu_entries(void)