Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753887AbZIRGyu (ORCPT ); Fri, 18 Sep 2009 02:54:50 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1753525AbZIRGyr (ORCPT ); Fri, 18 Sep 2009 02:54:47 -0400 Received: from e28smtp08.in.ibm.com ([59.145.155.8]:40971 "EHLO e28smtp08.in.ibm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753041AbZIRGyq (ORCPT ); Fri, 18 Sep 2009 02:54:46 -0400 Message-ID: <4AB32EA7.20904@linux.vnet.ibm.com> Date: Fri, 18 Sep 2009 12:24:31 +0530 From: Rishikesh User-Agent: Thunderbird 2.0.0.23 (X11/20090825) MIME-Version: 1.0 To: Dhaval Giani CC: iranna.ankad@in.ibm.com, Peter Zijlstra , containers@lists.linux-foundation.org, bugzilla-daemon@bugzilla.kernel.org, Srivatsa Vaddagiri , linux-kernel@vger.kernel.org, bugme-daemon@bugzilla.kernel.org, Bharata B Rao , Andrew Morton , Ingo Molnar Subject: Re: [Bugme-new] [Bug 14150] New: BUG: soft lockup - CPU#3 stuck for 61s!, while running cpu controller latency testcase on two containers parallaly References: <20090911142813.dc823bf1.akpm@linux-foundation.org> <20090915125836.GA4087@linux.vnet.ibm.com> <4AB20086.8070105@linux.vnet.ibm.com> In-Reply-To: <4AB20086.8070105@linux.vnet.ibm.com> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 11432 Lines: 281 Rishikesh wrote: > Dhaval Giani wrote: >> On Fri, Sep 11, 2009 at 02:28:13PM -0700, Andrew Morton wrote: >> >>> (switched to email. Please respond via emailed reply-to-all, not >>> via the >>> bugzilla web interface). >>> >>> On Thu, 10 Sep 2009 09:32:30 GMT >>> bugzilla-daemon@bugzilla.kernel.org wrote: >>> >>> >>>> http://bugzilla.kernel.org/show_bug.cgi?id=14150 >>>> >>>> Summary: BUG: soft lockup - CPU#3 stuck for 61s!, while >>>> running >>>> cpu controller latency testcase on two containers >>>> parallaly >>>> Product: Process Management >>>> Version: 2.5 >>>> Kernel Version: 2.6.31-rc7 >>>> Platform: All >>>> OS/Version: Linux >>>> Tree: Mainline >>>> Status: NEW >>>> Severity: high >>>> Priority: P1 >>>> Component: Scheduler >>>> AssignedTo: mingo@elte.hu >>>> ReportedBy: risrajak@linux.vnet.ibm.com >>>> CC: serue@us.ibm.com, iranna.ankad@in.ibm.com, >>>> risrajak@in.ibm.com >>>> Regression: No >>>> >>>> >>>> Created an attachment (id=23055) >>>> --> (http://bugzilla.kernel.org/attachment.cgi?id=23055) >>>> Config-file-used >>>> >>>> Hitting this soft lock issue while running this scenario on >>>> 2.6.31-rc7 kernel >>>> on SystemX 32 bit on multiple machines. >>>> >>>> Scenario: >>>> - While running cpu controller latency testcase from LTP same >>>> time on two >>>> containers. >>>> >>>> Steps: >>>> 1. Compile ltp-full-20090731.tgz on host. >>>> 2. Create two container (Used lxc tool >>>> (http://sourceforge.net/projects/lxc/lxc-0.6.3.tar.gz) for creating >>>> container ) >>>> e.g: >>>> lxc-create -n foo1 >>>> lxc-create -n foo2 >>>> On first shell: >>>> lxc-execute -n foo1 -f /usr/etc/lxc/lxc-macvlan.conf /bin/bash >>>> on Second shell: >>>> lxc-execute -n foo2 -f /usr/etc/lxc/lxc-macvlan.conf /bin/bash >>>> >>>> 3. Either you run cpu_latency testcase alone or run "./runltp -f >>>> controllers" >>>> at same time on both the containers. >>>> 4. After testcase execution completes, you can see this message in >>>> dmesg. >>>> >>>> Expected Result: >>>> - Should not reproduce soft lock up issue. >>>> - This reproduces 3 times out of 5 tries. >>>> >>>> hrtimer: interrupt too slow, forcing clock min delta to 5843235 ns >>>> hrtimer: interrupt too slow, forcing clock min delta to 5842476 ns >>>> Clocksource tsc unstable (delta = 18749057581 ns) >>>> BUG: soft lockup - CPU#3 stuck for 61s! [cpuctl_latency_:17174] >>>> Modules linked in: bridge stp llc bnep sco l2cap bluetooth sunrpc ipv6 >>>> p4_clockmod dm_multipath uinput qla2xxx ata_generic pata_acpi >>>> usb_storage e1000 >>>> scsi_transport_fc joydev scsi_tgt i2c_piix4 pata_serverworks pcspkr >>>> serio_raw >>>> mptspi mptscsih mptbase scsi_transport_spi radeon ttm drm >>>> i2c_algo_bit i2c_core >>>> [last unloaded: scsi_wait_scan] >>>> >>>> Pid: 17174, comm: cpuctl_latency_ Tainted: G W (2.6.31-rc7 >>>> #1) IBM >>>> eServer BladeCenter HS40 -[883961X]- EIP: >>>> 0060:[] EFLAGS: 00000283 CPU: 3 >>>> EIP is at find_next_bit+0x9/0x79 >>>> EAX: c2c437a0 EBX: f3d433c0 ECX: 00000000 EDX: 00000020 >>>> ESI: c2c436bc EDI: 00000000 EBP: f063be6c ESP: f063be64 >>>> DS: 007b ES: 007b FS: 00d8 GS: 0033 SS: 0068 >>>> CR0: 80050033 CR2: 008765a4 CR3: 314d7000 CR4: 000006d0 >>>> DR0: 00000000 DR1: 00000000 DR2: 00000000 DR3: 00000000 >>>> DR6: ffff0ff0 DR7: 00000400 >>>> Call Trace: >>>> [] cpumask_next+0x17/0x19 >>>> [] tg_shares_up+0x53/0x149 >>>> [] ? tg_nop+0x0/0xc >>>> [] ? tg_nop+0x0/0xc >>>> [] walk_tg_tree+0x63/0x77 >>>> [] ? tg_shares_up+0x0/0x149 >>>> [] update_shares+0x5d/0x65 >>>> [] rebalance_domains+0x114/0x460 >>>> [] ? restore_all_notrace+0x0/0x18 >>>> [] run_rebalance_domains+0x36/0xa3 >>>> [] __do_softirq+0xbc/0x173 >>>> [] do_softirq+0x3b/0x5f >>>> [] irq_exit+0x3a/0x68 >>>> [] smp_apic_timer_interrupt+0x6d/0x7b >>>> [] apic_timer_interrupt+0x2f/0x34 >>>> BUG: soft lockup - CPU#2 stuck for 61s! [watchdog/2:11] >>>> Modules linked in: bridge stp llc bnep sco l2cap bluetooth sunrpc ipv6 >>>> p4_clockmod dm_multipath uinput qla2xxx ata_generic pata_acpi >>>> usb_storage e1000 >>>> scsi_transport_fc joydev scsi_tgt i2c_piix4 pata_serverworks pcspkr >>>> serio_raw >>>> mptspi mptscsih mptbase scsi_transport_spi radeon ttm drm >>>> i2c_algo_bit i2c_core >>>> [last unloaded: scsi_wait_scan] >>>> >>>> Pid: 11, comm: watchdog/2 Tainted: G W (2.6.31-rc7 #1) IBM >>>> eServer >>>> BladeCenter HS40 -[883961X]- EIP: >>>> 0060:[] EFLAGS: 00000246 CPU: 2 >>>> EIP is at tg_shares_up+0xd9/0x149 >>>> EAX: 00000000 EBX: f09b3c00 ECX: f0baac00 EDX: 00000100 >>>> ESI: 00000002 EDI: 00000400 EBP: f6cb7de0 ESP: f6cb7db8 >>>> DS: 007b ES: 007b FS: 00d8 GS: 0000 SS: 0068 >>>> CR0: 8005003b CR2: 08070680 CR3: 009c8000 CR4: 000006d0 >>>> DR0: 00000000 DR1: 00000000 DR2: 00000000 DR3: 00000000 >>>> DR6: ffff0ff0 DR7: 00000400 >>>> Call Trace: >>>> [] ? tg_nop+0x0/0xc >>>> [] ? tg_nop+0x0/0xc >>>> [] walk_tg_tree+0x63/0x77 >>>> [] ? tg_shares_up+0x0/0x149 >>>> [] update_shares+0x5d/0x65 >>>> [] rebalance_domains+0x114/0x460 >>>> [] run_rebalance_domains+0x36/0xa3 >>>> [] __do_softirq+0xbc/0x173 >>>> [] do_softirq+0x3b/0x5f >>>> [] irq_exit+0x3a/0x68 >>>> [] smp_apic_timer_interrupt+0x6d/0x7b >>>> [] apic_timer_interrupt+0x2f/0x34 >>>> [] ? finish_task_switch+0x5d/0xc4 >>>> [] schedule+0x74c/0x7b2 >>>> [] ? trace_hardirqs_on_thunk+0xc/0x10 >>>> [] ? restore_all_notrace+0x0/0x18 >>>> [] ? watchdog+0x0/0x79 >>>> [] ? watchdog+0x0/0x79 >>>> [] watchdog+0x4a/0x79 >>>> [] kthread+0x70/0x75 >>>> [] ? kthread+0x0/0x75 >>>> [] kernel_thread_helper+0x7/0x10 >>>> [root@hs40 ltp-full-20090731]# uname -a >>>> Linux hs40.in.ibm.com 2.6.31-rc7 #1 SMP Thu Sep 3 10:14:41 IST 2009 >>>> i686 i686 >>>> i386 GNU/Linux >>>> [root@hs40 ltp-full-20090731]# >>>> >>>> >> >> We have been unable to reproduce it on current -tip. Rishi, are you able >> to reproduce it on -tip? >> >> thanks, >> > I am not able to create container with lxc on -tip kernel with config > file attached. As soon as i am executing "lxc-execute ..." it hangs > and only way to recover is to hard reboot system. enabled the nmi_watchdog on tip kernel and found this call trace on system while executing "lxc-execute ..." command ( creating container). x335a.in.ibm.com login: BUG: NMI Watchdog detected LOCKUP on CPU1, ip c075f208, registers: Modules linked in: nfs lockd nfs_acl auth_rpcgss bridge stp llc bnep sco l2cap bluetooth autofs4 sunrpc ipv6 p4_clockmod dm_multipath uinput ata_generic pata_acpi pata_serverworks i2c_piix4 floppy tg3 i2c_core pcspkr serio_raw mptspi mptscsih mptbase scsi_transport_spi [last unloaded: scsi_wait_scan] Pid: 0, comm: swapper Not tainted (2.6.31-tip #2) eserver xSeries 335 -[867641X]- EIP: 0060:[] EFLAGS: 00000097 CPU: 1 EIP is at _spin_lock_irqsave+0x2b/0x39 EAX: 00002625 EBX: c3128e00 ECX: 00000000 EDX: 00000200 ESI: 00000086 EDI: 00000400 EBP: f70a9d58 ESP: f70a9d50 DS: 007b ES: 007b FS: 00d8 GS: 0000 SS: 0068 Process swapper (pid: 0, ti=f70a8000 task=f7086780 task.ti=f70a8000) Stack: f6461a80 00000001 f70a9d94 c043335a 00000200 00000400 c31243d8 c3124350 <0> c31244c0 c3128e00 c09f3e00 00000086 00000001 00000800 f6461a80 c31243d8 <0> c042c0d4 f70a9dac c042c0c0 c0433226 c31243d8 000b71b0 00000000 f70a9dd0 Call Trace: [] ? tg_shares_up+0x134/0x1bb [] ? tg_nop+0x0/0xc [] ? walk_tg_tree+0x63/0x77 [] ? tg_shares_up+0x0/0x1bb [] ? update_shares+0x69/0x71 [] ? select_task_rq_fair+0x153/0x5dc [] ? try_to_wake_up+0x7f/0x28a [] ? default_wake_function+0x10/0x12 [] ? __wake_up_common+0x37/0x5e [] ? complete+0x30/0x43 [] ? wakeme_after_rcu+0x10/0x12 [] ? __rcu_process_callbacks+0x141/0x201 [] ? rcu_process_callbacks+0x25/0x44 [] ? __do_softirq+0xbc/0x173 [] ? do_softirq+0x3b/0x5f [] ? irq_exit+0x3a/0x6d [] ? smp_apic_timer_interrupt+0x6d/0x7b [] ? apic_timer_interrupt+0x2f/0x34 [] ? native_safe_halt+0xa/0xc [] ? default_idle+0x4a/0x7c [] ? tick_nohz_restart_sched_tick+0x115/0x123 [] ? cpu_idle+0x58/0x79 [] ? start_secondary+0x19c/0x1a1 Code: 55 89 e5 56 53 0f 1f 44 00 00 89 c3 9c 58 8d 74 26 00 89 c6 fa 90 8d 74 26 00 e8 96 2b d3 ff b8 00 01 00 00 f0 66 0f c1 03 38 e0 <74> 06 f3 90 8a 03 eb f6 89 f0 5b 5e 5d c3 55 89 e5 53 0f 1f 44 ---[ end trace 8a14be6828557ade ]--- Kernel panic - not syncing: Non maskable interrupt Pid: 0, comm: swapper Tainted: G D 2.6.31-tip #2 Call Trace: [] ? printk+0x14/0x1d [] panic+0x3e/0xe5 [] die_nmi+0x86/0xd8 [] nmi_watchdog_tick+0x107/0x16e [] do_nmi+0xa3/0x27f [] nmi_stack_correct+0x28/0x2d [] ? _spin_lock_irqsave+0x2b/0x39 [] tg_shares_up+0x134/0x1bb [] ? tg_nop+0x0/0xc [] walk_tg_tree+0x63/0x77 [] ? tg_shares_up+0x0/0x1bb [] update_shares+0x69/0x71 [] select_task_rq_fair+0x153/0x5dc [] try_to_wake_up+0x7f/0x28a [] default_wake_function+0x10/0x12 [] __wake_up_common+0x37/0x5e [] complete+0x30/0x43 [] wakeme_after_rcu+0x10/0x12 [] __rcu_process_callbacks+0x141/0x201 [] rcu_process_callbacks+0x25/0x44 [] __do_softirq+0xbc/0x173 [] do_softirq+0x3b/0x5f [] irq_exit+0x3a/0x6d [] smp_apic_timer_interrupt+0x6d/0x7b [] apic_timer_interrupt+0x2f/0x34 [] ? native_safe_halt+0xa/0xc [] default_idle+0x4a/0x7c [] ? tick_nohz_restart_sched_tick+0x115/0x123 [] cpu_idle+0x58/0x79 [] start_secondary+0x19c/0x1a1 Rebooting in 1 seconds.. > I am not sure about tip but i am able to create the problem pretty > easily on 2.6.31-rc7 with that config file. > > Only the changes i have done in the config file from (2.6.31-rc7) is : > - Disabled KVM as it was giving me error on -tip kernel. > - Applied following patch : > http://www.gossamer-threads.com/lists/linux/kernel/1129527 > > Please let me know if you are able to recreate it on -tip with > following config. > ------------------------------------------------------------------------ > > _______________________________________________ > Containers mailing list > Containers@lists.linux-foundation.org > https://lists.linux-foundation.org/mailman/listinfo/containers -- 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/