Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754678Ab3JHJXi (ORCPT ); Tue, 8 Oct 2013 05:23:38 -0400 Received: from mail-qe0-f41.google.com ([209.85.128.41]:63418 "EHLO mail-qe0-f41.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753447Ab3JHJXg (ORCPT ); Tue, 8 Oct 2013 05:23:36 -0400 MIME-Version: 1.0 In-Reply-To: <1381221715.15686.3.camel@marge.simpson.net> References: <1381221715.15686.3.camel@marge.simpson.net> Date: Tue, 8 Oct 2013 11:23:35 +0200 Message-ID: Subject: Re: perf: perf sched lat segfault - bisected From: Stephane Eranian To: Mike Galbraith Cc: LKML , Arnaldo Carvalho de Melo Content-Type: text/plain; charset=UTF-8 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 5028 Lines: 90 On Tue, Oct 8, 2013 at 10:41 AM, Mike Galbraith wrote: > Box: Q6600 > > Reproducer: > perf sched record -- sleep 1 > perf sched lat (boom) > I don't understand the test case here. If I do this, perf sched lat complains of no trace records and no kernel crash. Could you provide the full cmdline? > The bisect winner: > > marge:/usr/local/src/kernel/linux-3.x.git # git bisect good > 5c5e854bc760a2e2c878df3cfcf2afa4febcd511 is the first bad commit > commit 5c5e854bc760a2e2c878df3cfcf2afa4febcd511 > Author: Stephane Eranian > Date: Wed Aug 21 12:10:25 2013 +0200 > > perf tools: Add attr->mmap2 support > > This patch adds support for the new PERF_RECORD_MMAP2 record type > exposed by the kernel. This is an extended PERF_RECORD_MMAP record. > > It adds for each file-backed mapping the device major, minor number and > the inode number and generation. > > This triplet uniquely identifies the source of a file-backed mapping. It > can be used to detect identical virtual mappings between processes, for > instance. > > The patch will prefer MMAP2 over MMAP. > > Signed-off-by: Stephane Eranian > Cc: Andi Kleen > Cc: David Ahern > Cc: Ingo Molnar > Cc: Jiri Olsa > Cc: Namhyung Kim > Cc: Peter Zijlstra > Link: http://lkml.kernel.org/r/1377079825-19057-3-git-send-email-eranian@google.com > [ Cope with 314add6 "Change machine__findnew_thread() to set thread pid", > fix 'perf test' regression test entry affected, > use perf_missing_features.mmap2 to fallback to not using .mmap2 in older kernels, > so that new tools can work with kernels where this feature is not present ] > Signed-off-by: Arnaldo Carvalho de Melo > > :040000 040000 2d600afbdd11b323bbcd00a4c6b50ee82a604acc d2a81503d08aeea994e203245358ae939eb5e787 M tools > > > git bisect start > # bad: [8b5ede69d24db939f52b47effff2f6fe1e83e08b] powerpc/irq: Don't switch to irq stack from softirq stack > git bisect bad 8b5ede69d24db939f52b47effff2f6fe1e83e08b > # good: [6e4664525b1db28f8c4e1130957f70a94c19213e] Linux 3.11 > git bisect good 6e4664525b1db28f8c4e1130957f70a94c19213e > # good: [57d730924d5cc2c3e280af16a9306587c3a511db] Merge branch 'timers-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip > git bisect good 57d730924d5cc2c3e280af16a9306587c3a511db > # good: [d8cacd3a259bf522ea5e6c4c60eba67ba22f599c] Merge tag 'virtio-next-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linux > git bisect good d8cacd3a259bf522ea5e6c4c60eba67ba22f599c > # good: [b55ee2816ed6d8f8a00d4badab0e3642ffbac19f] Merge branch 'sched-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip > git bisect good b55ee2816ed6d8f8a00d4badab0e3642ffbac19f > # bad: [d45004f9947e521fc9e812bc7937ed6e0328793b] Merge tag 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost > git bisect bad d45004f9947e521fc9e812bc7937ed6e0328793b > # bad: [9bf12df31f282e845b3dfaac1e5d5376a041da22] Merge git://git.kvack.org/~bcrl/aio-next > git bisect bad 9bf12df31f282e845b3dfaac1e5d5376a041da22 > # bad: [26935fb06ee88f1188789807687c03041f3c70d9] Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs > git bisect bad 26935fb06ee88f1188789807687c03041f3c70d9 > # bad: [5223161dc0f5e44fbf3d5e42d23697b6796cdf4e] Merge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/cooloney/linux-leds > git bisect bad 5223161dc0f5e44fbf3d5e42d23697b6796cdf4e > # bad: [02b9735c12892e04d3e101b06e4c6d64a814f566] Merge tag 'pm+acpi-fixes-3.12-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm > git bisect bad 02b9735c12892e04d3e101b06e4c6d64a814f566 > # good: [0df03a30c333d67ee9b4c37f32d423624f48fe05] Merge branch 'pm-cpufreq' > git bisect good 0df03a30c333d67ee9b4c37f32d423624f48fe05 > # bad: [5c5e854bc760a2e2c878df3cfcf2afa4febcd511] perf tools: Add attr->mmap2 support > git bisect bad 5c5e854bc760a2e2c878df3cfcf2afa4febcd511 > # good: [41817815666e4a6f302dad1fea47cbe64cc45e40] perf trace: Check if MAP_32BIT is defined > git bisect good 41817815666e4a6f302dad1fea47cbe64cc45e40 > # good: [ccf53eac2097fb47bc40875ffb22c2d10fa8c46c] perf trace: Handle perf.data files with no tracepoints > git bisect good ccf53eac2097fb47bc40875ffb22c2d10fa8c46c > # good: [e71aa28312b208a14cd87fa61e941ac8c85072f4] perf kvm: Fix sample_type manipulation > git bisect good e71aa28312b208a14cd87fa61e941ac8c85072f4 > # first bad commit: [5c5e854bc760a2e2c878df3cfcf2afa4febcd511] perf tools: Add attr->mmap2 support > > -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/