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Message-ID: <20090911112504.GI4474@linux.vnet.ibm.com> Date: Fri, 11 Sep 2009 16:55:04 +0530 From: Dhaval Giani <dhaval@...ux.vnet.ibm.com> To: Rishikesh <risrajak@...ux.vnet.ibm.com> Cc: containers@...ts.osdl.org, linux-kernel@...r.kernel.org, iranna.ankad@...ibm.com, bharanga@...ibm.com, sharyath@...ux.vnet.ibm.com, risrajak@...ibm.com, bharata.rao@...ibm.com, mbeeraka@...ibm.com, svishuku@...ibm.com, santwana.samantray@...ibm.com, Ingo Molnar <mingo@...e.hu>, Peter Zijlstra <a.p.zijlstra@...llo.nl> Subject: Re: BUG: soft lockup - CPU#3 stuck for 61s! , while running cpu controller latency testcase on two containers parallaly [Adding the scheduler maintainers to the cc] On Thu, Sep 10, 2009 at 03:03:22PM +0530, Rishikesh wrote: > Hi, > > I am hitting this soft lock issue while running this scenario on > 2.6.31-rc7 kernel on SystemX 32 bit on multiple machines. > > Opened bug : http://bugzilla.kernel.org/show_bug.cgi?id=14150 > > Scenario: > - While running cpu controller latency testcase from LTP same time > on two containers. > > Steps: > 1. Create two container e.g: > lxc-execute -n foo1 -f /usr/etc/lxc/lxc-macvlan.conf /bin/bash > lxc-execute -n foo2 -f /usr/etc/lxc/lxc-macvlan.conf /bin/bash > 2. Compile ltp-full-20090731.tgz on host. > 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:[<c058aded>] 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: > [<c0427b6e>] cpumask_next+0x17/0x19 > [<c042c28d>] tg_shares_up+0x53/0x149 > [<c0424082>] ? tg_nop+0x0/0xc > [<c0424082>] ? tg_nop+0x0/0xc > [<c042406e>] walk_tg_tree+0x63/0x77 > [<c042c23a>] ? tg_shares_up+0x0/0x149 > [<c042e836>] update_shares+0x5d/0x65 > [<c0432af3>] rebalance_domains+0x114/0x460 > [<c0403393>] ? restore_all_notrace+0x0/0x18 > [<c0432e75>] run_rebalance_domains+0x36/0xa3 > [<c043c324>] __do_softirq+0xbc/0x173 > [<c043c416>] do_softirq+0x3b/0x5f > [<c043c52d>] irq_exit+0x3a/0x68 > [<c0417846>] smp_apic_timer_interrupt+0x6d/0x7b > [<c0403c9b>] 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:[<c042c313>] 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: > [<c0424082>] ? tg_nop+0x0/0xc > [<c0424082>] ? tg_nop+0x0/0xc > [<c042406e>] walk_tg_tree+0x63/0x77 > [<c042c23a>] ? tg_shares_up+0x0/0x149 > [<c042e836>] update_shares+0x5d/0x65 > [<c0432af3>] rebalance_domains+0x114/0x460 > [<c0432e75>] run_rebalance_domains+0x36/0xa3 > [<c043c324>] __do_softirq+0xbc/0x173 > [<c043c416>] do_softirq+0x3b/0x5f > [<c043c52d>] irq_exit+0x3a/0x68 > [<c0417846>] smp_apic_timer_interrupt+0x6d/0x7b > [<c0403c9b>] apic_timer_interrupt+0x2f/0x34 > [<c0430d37>] ? finish_task_switch+0x5d/0xc4 > [<c0744b11>] schedule+0x74c/0x7b2 > [<c0590e28>] ? trace_hardirqs_on_thunk+0xc/0x10 > [<c0403393>] ? restore_all_notrace+0x0/0x18 > [<c0471e19>] ? watchdog+0x0/0x79 > [<c0471e19>] ? watchdog+0x0/0x79 > [<c0471e63>] watchdog+0x4a/0x79 > [<c0449a53>] kthread+0x70/0x75 > [<c04499e3>] ? kthread+0x0/0x75 > [<c0403e93>] kernel_thread_helper+0x7/0x10 > [root@...0 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@...0 ltp-full-20090731]# thanks, -- regards, Dhaval -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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