From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 13564 invoked by alias); 17 Dec 2011 15:08:04 -0000 Received: (qmail 13555 invoked by uid 22791); 17 Dec 2011 15:08:02 -0000 X-SWARE-Spam-Status: No, hits=-2.8 required=5.0 tests=ALL_TRUSTED,AWL,BAYES_00 X-Spam-Check-By: sourceware.org Received: from localhost (HELO sourceware.org) (127.0.0.1) by sourceware.org (qpsmtpd/0.43rc1) with ESMTP; Sat, 17 Dec 2011 15:07:50 +0000 From: "fche at redhat dot com" To: systemtap@sourceware.org Subject: [Bug runtime/13514] New: more robust -rt support Date: Sat, 17 Dec 2011 15:08:00 -0000 X-Bugzilla-Reason: AssignedTo X-Bugzilla-Type: new X-Bugzilla-Watch-Reason: None X-Bugzilla-Product: systemtap X-Bugzilla-Component: runtime X-Bugzilla-Keywords: X-Bugzilla-Severity: normal X-Bugzilla-Who: fche at redhat dot com X-Bugzilla-Status: NEW X-Bugzilla-Priority: P2 X-Bugzilla-Assigned-To: systemtap at sourceware dot org X-Bugzilla-Target-Milestone: --- X-Bugzilla-Changed-Fields: Message-ID: X-Bugzilla-URL: http://sourceware.org/bugzilla/ Auto-Submitted: auto-generated Content-Type: text/plain; charset="UTF-8" MIME-Version: 1.0 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 X-SW-Source: 2011-q4/txt/msg00390.txt.bz2 http://sourceware.org/bugzilla/show_bug.cgi?id=13514 Bug #: 13514 Summary: more robust -rt support Product: systemtap Version: unspecified Status: NEW Severity: normal Priority: P2 Component: runtime AssignedTo: systemtap@sourceware.org ReportedBy: fche@redhat.com Classification: Unclassified One possible reason for systemtap -vs- kernel-rt instability could be this lockdep message. [ 3484.070463] [ 3484.070465] ================================= [ 3484.075050] [ INFO: inconsistent lock state ] [ 3484.077048] 2.6.33.9-rt31.64.el5rtdebug #1 [ 3484.078345] --------------------------------- [ 3484.080294] inconsistent {HARDIRQ-ON-W} -> {IN-HARDIRQ-W} usage. [ 3484.083291] swapper/0 [HC1[1]:SC0[0]:HE0:SE1] takes: [ 3484.085296] (_stp_print_lock#2){?.+...}, at: [] stp_print_flush+0x4b/0x1f4 [stap_dce4e96d74ad5bd334a54aae76da7bbb_4605] [ 3484.091291] {HARDIRQ-ON-W} state was registered at: [ 3484.093292] [] __lock_acquire+0x32f/0xc79 [ 3484.096291] [] lock_acquire+0xd1/0xee [ 3484.101296] [] rt_spin_lock+0x43/0x48 [ 3484.105287] [] stp_print_flush+0x4b/0x1f4 [stap_dce4e96d74ad5bd334a54aae76da7bbb_4605] [ 3484.110295] [] _stp_print_flush+0x2c/0x31 [stap_dce4e96d74ad5bd334a54aae76da7bbb_4605] [ 3484.115333] [] probe_2000+0x3f/0x118 [stap_dce4e96d74ad5bd334a54aae76da7bbb_4605] [ 3484.120303] [] enter_be_probe+0x117/0x1fc [stap_dce4e96d74ad5bd334a54aae76da7bbb_4605] [ 3484.125300] [] _stp_ctl_write_cmd+0x3e0/0xf25 [stap_dce4e96d74ad5bd334a54aae76da7bbb_4605] [ 3484.129300] [] vfs_write+0xb3/0x10d [ 3484.133326] [] sys_write+0x4f/0x77 [ 3484.136309] [] system_call_fastpath+0x16/0x1b [ 3484.141286] irq event stamp: 33336926 [ 3484.143287] hardirqs last enabled at (33336925): [] default_idle+0x39/0x55 [ 3484.148288] hardirqs last disabled at (33336926): [] save_args+0x67/0x70 [ 3484.154174] softirqs last enabled at (0): [] copy_process+0x5e3/0x139b [ 3484.158290] softirqs last disabled at (0): [<(null)>] (null) [ 3484.160286] [ 3484.160286] other info that might help us debug this: [ 3484.166310] no locks held by swapper/0. [ 3484.168288] [ 3484.168288] stack backtrace: [ 3484.172304] Pid: 0, comm: swapper Tainted: G W 2.6.33.9-rt31.64.el5rtdebug #1 [ 3484.177293] Call Trace: [ 3484.179168] [] valid_state+0x17c/0x18f [ 3484.182316] [] ? check_usage_forwards+0x0/0x7e [ 3484.185388] [] mark_lock+0xdb/0x1f8 [ 3484.188167] [] __lock_acquire+0x2c0/0xc79 [ 3484.190288] [] ? cpu_clock+0x2d/0x41 [ 3484.192285] [] lock_acquire+0xd1/0xee [ 3484.197170] [] ? stp_print_flush+0x4b/0x1f4 [stap_dce4e96d74ad5bd334a54aae76da7bbb_4605] [ 3484.202046] [] ? tick_sched_timer+0x0/0xa2 [ 3484.204338] [] rt_spin_lock+0x43/0x48 [ 3484.207282] [] ? stp_print_flush+0x4b/0x1f4 [stap_dce4e96d74ad5bd334a54aae76da7bbb_4605] [ 3484.211286] [] stp_print_flush+0x4b/0x1f4 [stap_dce4e96d74ad5bd334a54aae76da7bbb_4605] [ 3484.215286] [] ? tick_sched_timer+0x0/0xa2 [ 3484.218289] [] _stp_print_flush+0x2c/0x31 [stap_dce4e96d74ad5bd334a54aae76da7bbb_4605] [ 3484.225202] [] probe_2005+0x62/0xc5 [stap_dce4e96d74ad5bd334a54aae76da7bbb_4605] [ 3484.230291] [] enter_profile_probes+0x297/0x2f4 [stap_dce4e96d74ad5bd334a54aae76da7bbb_4605] [ 3484.234294] [] profile_tick+0x2e/0x6f [ 3484.237236] [] tick_sched_timer+0x82/0xa2 [ 3484.239287] [] __run_hrtimer+0xa4/0x134 [ 3484.242172] [] hrtimer_interrupt+0xde/0x1e3 [ 3484.244402] [] smp_apic_timer_interrupt+0x78/0x8b [ 3484.247286] [] apic_timer_interrupt+0x13/0x20 [ 3484.250219] [] ? __atomic_notifier_call_chain+0x0/0x99 [ 3484.254320] [] ? default_idle+0x3b/0x55 [ 3484.258300] [] ? default_idle+0x39/0x55 [ 3484.261293] [] cpu_idle+0x8d/0xe4 [ 3484.264287] [] start_secondary+0x1ae/0x1b3 -- Configure bugmail: http://sourceware.org/bugzilla/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are the assignee for the bug.