On 8/22/15 7:00 AM, kernel test robot wrote:
FYI, we noticed the below changes ongit://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master commit 25834c73f93af7f0712c98ca4593691592e6b360 ("sched: Fix a race between __kthread_bind() and sched_setaffinity()")
https://lkml.org/lkml/2015/8/25/117 Hopes this patch can fix it. Regards, Wanpeng Li
+------------------------------------------------------------------+------------+------------+ | | 7855a35ac0 | 25834c73f9 | +------------------------------------------------------------------+------------+------------+ | boot_successes | 10 | 0 | | boot_failures | 1 | 11 | | Out_of_memory:Kill_process | 1 | 11 | | Kernel_panic-not_syncing:Out_of_memory_and_no_killable_processes | 1 | 10 | | backtrace:vfs_fstatat | 1 | 2 | | backtrace:SyS_fstatat64 | 1 | 2 | | WARNING:at_kernel/sched/core.c:#do_set_cpus_allowed() | 0 | 6 | | backtrace:smpboot_thread_fn | 0 | 6 | | backtrace:SYSC_socketcall | 0 | 4 | | backtrace:SyS_socketcall | 0 | 4 | | backtrace:tty_ldisc_setup | 0 | 1 | | backtrace:tty_init_dev | 0 | 1 | | backtrace:do_sys_open | 0 | 1 | | backtrace:SyS_open | 0 | 1 | +------------------------------------------------------------------+------------+------------+ [ 15.273708] ------------[ cut here ]------------ [ 15.274097] WARNING: CPU: 0 PID: 13 at kernel/sched/core.c:1156 do_set_cpus_allowed+0x7e/0x80() [ 15.274857] Modules linked in: [ 15.275101] CPU: 0 PID: 13 Comm: migration/0 Not tainted 4.2.0-rc1-00049-g25834c7 #2 [ 15.275674] 00000000 00000000 d21f1d24 c19228b2 00000000 d21f1d58 c1056a3b c1ba00e4 [ 15.276084] 00000000 0000000d c1ba17d8 00000484 c10838be 00000484 c10838be d21e5000 [ 15.276084] d2121900 d21e5158 d21f1d68 c1056b12 00000009 00000000 d21f1d7c c10838be [ 15.276084] Call Trace: [ 15.276084] [<c19228b2>] dump_stack+0x4b/0x75 [ 15.276084] [<c1056a3b>] warn_slowpath_common+0x8b/0xc0 [ 15.276084] [<c10838be>] ? do_set_cpus_allowed+0x7e/0x80 [ 15.276084] [<c10838be>] ? do_set_cpus_allowed+0x7e/0x80 [ 15.276084] [<c1056b12>] warn_slowpath_null+0x22/0x30 [ 15.276084] [<c10838be>] do_set_cpus_allowed+0x7e/0x80 [ 15.276084] [<c110154c>] cpuset_cpus_allowed_fallback+0x7c/0x170 [ 15.276084] [<c11014d0>] ? cpuset_cpus_allowed+0x180/0x180 [ 15.276084] [<c1083ae1>] select_fallback_rq+0x221/0x280 [ 15.276084] [<c1085073>] migration_call+0xe3/0x250 [ 15.276084] [<c1079e23>] notifier_call_chain+0x53/0x70 [ 15.276084] [<c1079e5e>] __raw_notifier_call_chain+0x1e/0x30 [ 15.276084] [<c1056cc8>] cpu_notify+0x28/0x50 [ 15.276084] [<c191e4d2>] take_cpu_down+0x22/0x40 [ 15.276084] [<c1102895>] multi_cpu_stop+0xd5/0x140 [ 15.276084] [<c11027c0>] ? __stop_cpus+0x80/0x80 [ 15.276084] [<c11025cc>] cpu_stopper_thread+0xbc/0x170 [ 15.276084] [<c1085ec9>] ? preempt_count_sub+0x9/0x50 [ 15.276084] [<c192b6a7>] ? _raw_spin_unlock_irq+0x37/0x50 [ 15.276084] [<c192b655>] ? _raw_spin_unlock_irqrestore+0x55/0x70 [ 15.276084] [<c10a9074>] ? trace_hardirqs_on_caller+0x144/0x1e0 [ 15.276084] [<c11024a5>] ? cpu_stop_should_run+0x35/0x40 [ 15.276084] [<c1085ec9>] ? preempt_count_sub+0x9/0x50 [ 15.276084] [<c192b641>] ? _raw_spin_unlock_irqrestore+0x41/0x70 [ 15.276084] [<c107c944>] smpboot_thread_fn+0x174/0x2f0 [ 15.276084] [<c107c7d0>] ? sort_range+0x30/0x30 [ 15.276084] [<c1078934>] kthread+0xc4/0xe0 [ 15.276084] [<c192c041>] ret_from_kernel_thread+0x21/0x30 [ 15.276084] [<c1078870>] ? kthread_create_on_node+0x180/0x180 [ 15.276084] ---[ end trace 15f4c86d404693b0 ]--- Thanks, Ying Huang
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