From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756586AbZCVTm0 (ORCPT ); Sun, 22 Mar 2009 15:42:26 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1755875AbZCVTmJ (ORCPT ); Sun, 22 Mar 2009 15:42:09 -0400 Received: from mx3.mail.elte.hu ([157.181.1.138]:47035 "EHLO mx3.mail.elte.hu" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755761AbZCVTmH (ORCPT ); Sun, 22 Mar 2009 15:42:07 -0400 Date: Sun, 22 Mar 2009 20:41:53 +0100 From: Ingo Molnar To: Steven Rostedt Cc: Frederic Weisbecker , LKML , Thomas Gleixner , Peter Zijlstra Subject: Re: [PATCH 0/5] [GIT PULL] updates for tip/tracing/ftrace Message-ID: <20090322194153.GA10112@elte.hu> References: <20090320183642.GA2070@elte.hu> <20090320183849.GA3657@elte.hu> <20090320191926.GJ6698@linux.vnet.ibm.com> <20090320192721.GI6224@elte.hu> <20090320194617.GA5934@nowhere> <20090320195414.GA24129@elte.hu> <20090320204848.GA6044@nowhere> <20090321100129.GC7201@elte.hu> <20090321165804.GA21366@elte.hu> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20090321165804.GA21366@elte.hu> User-Agent: Mutt/1.5.18 (2008-05-17) X-ELTE-VirusStatus: clean X-ELTE-SpamScore: -0.7 X-ELTE-SpamLevel: X-ELTE-SpamCheck: no X-ELTE-SpamVersion: ELTE 2.0 X-ELTE-SpamCheck-Details: score=-0.7 required=5.9 tests=BAYES_00,UPPERCASE_50_75 autolearn=no SpamAssassin version=3.2.5 -1.5 BAYES_00 BODY: Bayesian spam probability is 0 to 1% [score: 0.0000] 0.8 UPPERCASE_50_75 message body is 50-75% uppercase Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org found another, unrelated lockup with the event tracer: europe:/debug/tracing/events/sched/sched_wakeup_new> cat enable 0 europe:/debug/tracing/events/sched/sched_wakeup_new> echo 1 > enable europe:/debug/tracing/events/sched/sched_wakeup_new> sync europe:/debug/tracing/events/sched/sched_wakeup_new> cat ../../../trace_pipe <...>-2870 [000] 688.730160: sched_wakeup_new: task bash:2898 [120] success=1 <...>-2870 [001] 689.945375: sched_wakeup_new: task bash:2899 [120] success=1 [hard lockup] The .config bits that matter er the Kernel hacking and Tracer portions - i plugged those bits into a 64-bit system as well and it insta-locked similarly. See them below. Put the sections below into your usual .config and you'll likely see the same lockup. Ingo # # Kernel hacking # CONFIG_TRACE_IRQFLAGS_SUPPORT=y # CONFIG_PRINTK_TIME is not set CONFIG_ALLOW_WARNINGS=y CONFIG_ENABLE_WARN_DEPRECATED=y # CONFIG_ENABLE_MUST_CHECK is not set CONFIG_FRAME_WARN=2048 CONFIG_MAGIC_SYSRQ=y # CONFIG_UNUSED_SYMBOLS is not set CONFIG_DEBUG_FS=y # CONFIG_HEADERS_CHECK is not set # CONFIG_DEBUG_SECTION_MISMATCH is not set CONFIG_DEBUG_KERNEL=y # CONFIG_DEBUG_SHIRQ is not set # CONFIG_DETECT_SOFTLOCKUP is not set CONFIG_DETECT_HUNG_TASK=y # CONFIG_BOOTPARAM_HUNG_TASK_PANIC is not set CONFIG_BOOTPARAM_HUNG_TASK_PANIC_VALUE=0 CONFIG_SCHED_DEBUG=y CONFIG_SCHEDSTATS=y # CONFIG_TIMER_STATS is not set # CONFIG_DEBUG_OBJECTS is not set # CONFIG_SLUB_DEBUG_ON is not set # CONFIG_SLUB_STATS is not set # CONFIG_DEBUG_RT_MUTEXES is not set CONFIG_RT_MUTEX_TESTER=y # CONFIG_DEBUG_SPINLOCK is not set # CONFIG_DEBUG_MUTEXES is not set # CONFIG_DEBUG_LOCK_ALLOC is not set # CONFIG_PROVE_LOCKING is not set # CONFIG_LOCK_STAT is not set CONFIG_TRACE_IRQFLAGS=y # CONFIG_DEBUG_SPINLOCK_SLEEP is not set # CONFIG_DEBUG_LOCKING_API_SELFTESTS is not set CONFIG_STACKTRACE=y CONFIG_DEBUG_BUGVERBOSE=y # CONFIG_DEBUG_VM is not set # CONFIG_DEBUG_VIRTUAL is not set # CONFIG_DEBUG_WRITECOUNT is not set CONFIG_DEBUG_MEMORY_INIT=y # CONFIG_DEBUG_LIST is not set # CONFIG_DEBUG_SG is not set # CONFIG_DEBUG_NOTIFIERS is not set CONFIG_ARCH_WANT_FRAME_POINTERS=y CONFIG_FRAME_POINTER=y # CONFIG_BOOT_PRINTK_DELAY is not set # CONFIG_RCU_TORTURE_TEST is not set # CONFIG_RCU_CPU_STALL_DETECTOR is not set # CONFIG_KPROBES_SANITY_TEST is not set # CONFIG_BACKTRACE_SELF_TEST is not set # CONFIG_LKDTM is not set # CONFIG_FAULT_INJECTION is not set # CONFIG_LATENCYTOP is not set CONFIG_SYSCTL_SYSCALL_CHECK=y CONFIG_USER_STACKTRACE_SUPPORT=y CONFIG_NOP_TRACER=y CONFIG_HAVE_FTRACE_NMI_ENTER=y CONFIG_HAVE_FUNCTION_TRACER=y CONFIG_HAVE_FUNCTION_GRAPH_TRACER=y CONFIG_HAVE_FUNCTION_TRACE_MCOUNT_TEST=y CONFIG_HAVE_DYNAMIC_FTRACE=y CONFIG_HAVE_FTRACE_MCOUNT_RECORD=y CONFIG_HAVE_HW_BRANCH_TRACER=y CONFIG_HAVE_FTRACE_SYSCALLS=y CONFIG_TRACER_MAX_TRACE=y CONFIG_RING_BUFFER=y CONFIG_FTRACE_NMI_ENTER=y CONFIG_TRACING=y CONFIG_TRACING_SUPPORT=y # # Tracers # CONFIG_FUNCTION_TRACER=y CONFIG_FUNCTION_GRAPH_TRACER=y CONFIG_IRQSOFF_TRACER=y CONFIG_SYSPROF_TRACER=y CONFIG_SCHED_TRACER=y CONFIG_CONTEXT_SWITCH_TRACER=y CONFIG_EVENT_TRACER=y CONFIG_FTRACE_SYSCALLS=y CONFIG_BOOT_TRACER=y CONFIG_POWER_TRACER=y CONFIG_STACK_TRACER=y CONFIG_HW_BRANCH_TRACER=y CONFIG_KMEMTRACE=y # CONFIG_WORKQUEUE_TRACER is not set CONFIG_BLK_DEV_IO_TRACE=y CONFIG_DYNAMIC_FTRACE=y CONFIG_FTRACE_MCOUNT_RECORD=y # CONFIG_FTRACE_STARTUP_TEST is not set CONFIG_MMIOTRACE=y # CONFIG_MMIOTRACE_TEST is not set # CONFIG_PROVIDE_OHCI1394_DMA_INIT is not set # CONFIG_DYNAMIC_PRINTK_DEBUG is not set # CONFIG_SAMPLES is not set CONFIG_HAVE_ARCH_KGDB=y # CONFIG_KGDB is not set CONFIG_HAVE_ARCH_KMEMCHECK=y # CONFIG_STRICT_DEVMEM is not set CONFIG_X86_VERBOSE_BOOTUP=y CONFIG_EARLY_PRINTK=y # CONFIG_EARLY_PRINTK_DBGP is not set # CONFIG_DEBUG_STACKOVERFLOW is not set # CONFIG_DEBUG_STACK_USAGE is not set # CONFIG_DEBUG_PAGEALLOC is not set # CONFIG_DEBUG_PER_CPU_MAPS is not set # CONFIG_X86_PTDUMP is not set CONFIG_DEBUG_RODATA=y # CONFIG_DEBUG_RODATA_TEST is not set # CONFIG_DEBUG_NX_TEST is not set # CONFIG_IOMMU_DEBUG is not set CONFIG_HAVE_MMIOTRACE_SUPPORT=y CONFIG_IO_DELAY_TYPE_0X80=0 CONFIG_IO_DELAY_TYPE_0XED=1 CONFIG_IO_DELAY_TYPE_UDELAY=2 CONFIG_IO_DELAY_TYPE_NONE=3 CONFIG_IO_DELAY_0X80=y # CONFIG_IO_DELAY_0XED is not set # CONFIG_IO_DELAY_UDELAY is not set # CONFIG_IO_DELAY_NONE is not set CONFIG_DEFAULT_IO_DELAY_TYPE=0 # CONFIG_DEBUG_BOOT_PARAMS is not set # CONFIG_CPA_DEBUG is not set # CONFIG_OPTIMIZE_INLINING is not set