From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 110264 invoked by alias); 22 Jun 2016 20:24:59 -0000 Mailing-List: contact systemtap-help@sourceware.org; run by ezmlm Precedence: bulk List-Id: List-Subscribe: List-Post: List-Help: , Sender: systemtap-owner@sourceware.org Received: (qmail 110252 invoked by uid 89); 22 Jun 2016 20:24:59 -0000 Authentication-Results: sourceware.org; auth=none X-Virus-Found: No X-Spam-SWARE-Status: No, score=-3.3 required=5.0 tests=BAYES_00,RP_MATCHES_RCVD,SPF_HELO_PASS autolearn=ham version=3.3.2 spammy=HX-Envelope-From:sk:wcohen@, H*F:U*wcohen, sk:systemt X-HELO: mx1.redhat.com Received: from mx1.redhat.com (HELO mx1.redhat.com) (209.132.183.28) by sourceware.org (qpsmtpd/0.93/v0.84-503-g423c35a) with (AES256-GCM-SHA384 encrypted) ESMTPS; Wed, 22 Jun 2016 20:24:49 +0000 Received: from int-mx09.intmail.prod.int.phx2.redhat.com (int-mx09.intmail.prod.int.phx2.redhat.com [10.5.11.22]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id 100D33B725; Wed, 22 Jun 2016 20:24:48 +0000 (UTC) Received: from [10.13.129.159] (dhcp129-159.rdu.redhat.com [10.13.129.159]) by int-mx09.intmail.prod.int.phx2.redhat.com (8.14.4/8.14.4) with ESMTP id u5MKOlfp017977; Wed, 22 Jun 2016 16:24:47 -0400 Subject: Re: exercising current aarch64 kprobe support with systemtap To: systemtap@sourceware.org, Dave Long , Pratyush Anand , Mark Brown References: Cc: Jeremy Linton , David Smith From: William Cohen Message-ID: <8f40d0b9-5550-92f9-d1c5-8769f52304c0@redhat.com> Date: Wed, 22 Jun 2016 20:24:00 -0000 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:45.0) Gecko/20100101 Thunderbird/45.1.1 MIME-Version: 1.0 In-Reply-To: Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 7bit X-IsSubscribed: yes X-SW-Source: 2016-q2/txt/msg00274.txt.bz2 Hi all, When running the current systemtap checked out from the git repository and a locally built kernel with the kprobes64-v13 patches (the test_upstream_arm64_devel branch of https://github.com/pratyushanand/linux) on Fedora 23 machine one of the kprobes_onthefly.exp tests is causing the machine to get in a state that requires rebooting to fix. This can be triggered by running a portion of the systemtap tests with: make installcheck RUNTESTFLAGS="--debug systemtap.onthefly/kprobes_onthefly.exp" When it gets to the kprobes_onthefly - otf_stress_max_iter_5000 test the console starts spewing the following and needs to be rebooted: [23394.036860] Unexpected kernel single-step exception at EL1 [23394.042434] Unexpected kernel single-step exception at EL1 [23394.048008] Unexpected kernel single-step exception at EL1 [23394.053541] Unexpected kernel single-step exception at EL1 [23394.059053] Unexpected kernel single-step exception at EL1 [23394.064545] Unexpected kernel single-step exception at EL1 Sorry I don't have the start of the failure it scrolled off the screen very quickly. -Will