Messages in this thread | | | Date | Thu, 02 Feb 2012 05:30:33 +0530 | From | "Srivatsa S. Bhat" <> | Subject | Re: [WARN] offlining CPUs yields warning at arch/x86/kernel/smp.c:120 |
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On 02/01/2012 07:53 PM, Manuel Lauss wrote:
> Hello, > > When offlining/onlining CPUs the following warning is spat out repeatedly. > System is a 4-core+HT SandyBridge laptop. Full dmesg below. > > CPU 7 is now offline > CPU 6 is now offline > CPU 5 is now offline > ------------[ cut here ]------------ > WARNING: at /mnt/data/.src/linux.git/arch/x86/kernel/smp.c:120 > update_process_times+0x65/0x80() > Hardware name: Precision M6600 > Modules linked in: > Pid: 17, comm: migration/2 Not tainted 3.3.0-rc1-00473-g6bc2b95 #1 > Call Trace: > <IRQ> [<ffffffff8104e5eb>] ? warn_slowpath_common+0x7b/0xc0 > [<ffffffff8108a000>] ? tick_nohz_handler+0xd0/0xd0 > [<ffffffff8105af45>] ? update_process_times+0x65/0x80 > [<ffffffff8108a05b>] ? tick_sched_timer+0x5b/0xb0 > [<ffffffff8106dc0e>] ? __run_hrtimer.isra.33+0x4e/0xe0 > [<ffffffff8106e3e0>] ? hrtimer_interrupt+0xe0/0x210 > [<ffffffff810a09e0>] ? queue_stop_cpus_work+0xf0/0xf0 > [<ffffffff8101c513>] ? smp_apic_timer_interrupt+0x63/0xa0 > [<ffffffff818acbcb>] ? apic_timer_interrupt+0x6b/0x70 > <EOI> [<ffffffff810a0a6a>] ? stop_machine_cpu_stop+0x8a/0xb0 > [<ffffffff810a06f4>] ? cpu_stopper_thread+0xc4/0x190 > [<ffffffff81073e6e>] ? try_to_wake_up+0x1de/0x290 > [<ffffffff8107153f>] ? __wake_up_common+0x4f/0x80 > [<ffffffff810a0630>] ? cpu_stop_signal_done+0x30/0x30 > [<ffffffff81069ec5>] ? kthread+0x85/0x90 > [<ffffffff818ad294>] ? kernel_thread_helper+0x4/0x10 > [<ffffffff81069e40>] ? kthread_freezable_should_stop+0x60/0x60 > [<ffffffff818ad290>] ? gs_change+0xb/0xb > ---[ end trace 431db5dbf525be16 ]--- > CPU 4 is now offline > > [and so on]. > > Please take a look. >
Hi,
Try this patch: https://lkml.org/lkml/2012/1/19/463
Regards, Srivatsa S. Bhat IBM Linux Technology Center
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