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Date: Mon, 09 Jan 2017 10:16:12 +0200 From: mitko@...-bg.com To: linux-kernel@...r.kernel.org Subject: rcu_sched detected stalls on CPUs and server freeze for few minutes. Hello, from few months I have a problem with my kernel or server. I read a lots of posts in internet but unable to find solution or information what trigger this error. Im using Slackware linux x86-64, kernel version: Linux database 4.4.38 #2 SMP Sun Dec 11 16:11:02 CST 2016 x86_64 Intel(R) Xeon(R) CPU E7- 4830 @ 2.13GHz GenuineIntel GNU/Linux Load of my server isnt big less then 0.50 and when server freeze nothing is working for 3-5 minute. No lan, no video, no keyboard, mouse. Nothing is working. After these few minutes everything continue normal. I read kernel documentation but did not find how to resolve the problem. I change a few kernels in last few months but no effect. Usual error is : [Tue Jan 3 14:34:48 2017] INFO: rcu_sched detected stalls on CPUs/tasks: [Tue Jan 3 14:34:48 2017] 0-...: (1 GPs behind) idle=0c3/1/0 softirq=99925959/99925960 fqs=18719 [Tue Jan 3 14:34:48 2017] (detected by 12, t=60002 jiffies, g=59107674, c=59107673, q=4826) [Tue Jan 3 14:34:48 2017] Task dump for CPU 0: [Tue Jan 3 14:34:48 2017] swapper/0 R running task 0 0 0 0x00000008 [Tue Jan 3 14:34:48 2017] ffffffff82403e98 0000000000000018 ffffffff81b342ad 0000000082403ee8 [Tue Jan 3 14:34:48 2017] 00062f9abbe9e97d ffffffff82558700 ffffffff82404000 ffffe8ffff400800 [Tue Jan 3 14:34:48 2017] ffffffff824b2f40 ffffffff82400000 ffffffff82403ee0 ffffffff81b34487 [Tue Jan 3 14:34:48 2017] Call Trace: [Tue Jan 3 14:34:48 2017] [<ffffffff81b342ad>] ? cpuidle_enter_state+0x10d/0x2b0 [Tue Jan 3 14:34:48 2017] [<ffffffff81b34487>] ? cpuidle_enter+0x17/0x20 [Tue Jan 3 14:34:48 2017] [<ffffffff810c9882>] ? call_cpuidle+0x32/0x60 [Tue Jan 3 14:34:48 2017] [<ffffffff81b34463>] ? cpuidle_select+0x13/0x20 [Tue Jan 3 14:34:48 2017] [<ffffffff810c9b1f>] ? cpu_startup_entry+0x26f/0x310 [Tue Jan 3 14:34:48 2017] [<ffffffff81c66e87>] ? rest_init+0x77/0x80 [Tue Jan 3 14:34:48 2017] [<ffffffff82577f63>] ? start_kernel+0x44b/0x458 [Tue Jan 3 14:34:48 2017] [<ffffffff825772fe>] ? x86_64_start_reservations+0x2a/0x2c [Tue Jan 3 14:34:48 2017] [<ffffffff82577468>] ? x86_64_start_kernel+0x168/0x176 Here was a big "crash" [Wed Jan 4 10:19:12 2017] INFO: rcu_sched detected stalls on CPUs/tasks: [Wed Jan 4 10:19:12 2017] 0-...: (1 GPs behind) idle=1e1/1/0 softirq=104171004/104171004 fqs=0 [Wed Jan 4 10:19:12 2017] 5-...: (0 ticks this GP) idle=e10/0/0 softirq=27256743/27256743 fqs=0 [Wed Jan 4 10:19:12 2017] 16-...: (17661 GPs behind) idle=922/0/0 softirq=371974/371974 fqs=0 [Wed Jan 4 10:19:12 2017] 17-...: (15806 GPs behind) idle=c1c/0/0 softirq=650751/650751 fqs=0 [Wed Jan 4 10:19:12 2017] 19-...: (0 ticks this GP) idle=7a8/0/0 softirq=589498/589498 fqs=0 [Wed Jan 4 10:19:12 2017] 20-...: (15801 GPs behind) idle=bfc/0/0 softirq=598502/598502 fqs=0 [Wed Jan 4 10:19:12 2017] 21-...: (24358 GPs behind) idle=c2c/0/0 softirq=502650/502650 fqs=0 [Wed Jan 4 10:19:12 2017] 22-...: (12806 GPs behind) idle=528/0/0 softirq=452491/452491 fqs=0 [Wed Jan 4 10:19:12 2017] 23-...: (3988 GPs behind) idle=01e/0/0 softirq=516819/516819 fqs=0 [Wed Jan 4 10:19:12 2017] 24-...: (0 ticks this GP) idle=f8a/0/0 softirq=1013969/1013969 fqs=0 [Wed Jan 4 10:19:12 2017] 25-...: (0 ticks this GP) idle=a2c/0/0 softirq=965710/965710 fqs=0 [Wed Jan 4 10:19:12 2017] 26-...: (0 ticks this GP) idle=fe2/0/0 softirq=1140759/1140759 fqs=0 [Wed Jan 4 10:19:12 2017] 27-...: (0 ticks this GP) idle=950/0/0 softirq=864214/864214 fqs=0 [Wed Jan 4 10:19:12 2017] 30-...: (0 ticks this GP) idle=e8e/0/0 softirq=923356/923356 fqs=0 [Wed Jan 4 10:19:12 2017] 31-...: (0 ticks this GP) idle=82c/0/0 softirq=977601/977601 fqs=0 [Wed Jan 4 10:19:12 2017] (detected by 6, t=60002 jiffies, g=61967937, c=61967936, q=4682) [Wed Jan 4 10:19:12 2017] Task dump for CPU 0: [Wed Jan 4 10:19:12 2017] swapper/0 R running task 0 0 0 0x00000008 [Wed Jan 4 10:19:12 2017] ffffffff82403e98 0000000000000018 ffffffff81b342ad 0000000082403ee8 [Wed Jan 4 10:19:12 2017] 0006703c8fc4629f ffffffff82558700 ffffffff82404000 ffffe8ffff400800 [Wed Jan 4 10:19:12 2017] ffffffff824b2f40 ffffffff82400000 ffffffff82403ee0 ffffffff81b34487 [Wed Jan 4 10:19:12 2017] Call Trace: [Wed Jan 4 10:19:12 2017] [<ffffffff81b342ad>] ? cpuidle_enter_state+0x10d/0x2b0 [Wed Jan 4 10:19:12 2017] [<ffffffff81b34487>] ? cpuidle_enter+0x17/0x20 [Wed Jan 4 10:19:12 2017] [<ffffffff810c9882>] ? call_cpuidle+0x32/0x60 [Wed Jan 4 10:19:12 2017] [<ffffffff81b34463>] ? cpuidle_select+0x13/0x20 [Wed Jan 4 10:19:12 2017] [<ffffffff810c9b1f>] ? cpu_startup_entry+0x26f/0x310 [Wed Jan 4 10:19:12 2017] [<ffffffff81c66e87>] ? rest_init+0x77/0x80 [Wed Jan 4 10:19:12 2017] [<ffffffff82577f63>] ? start_kernel+0x44b/0x458 [Wed Jan 4 10:19:12 2017] [<ffffffff825772fe>] ? x86_64_start_reservations+0x2a/0x2c [Wed Jan 4 10:19:12 2017] [<ffffffff82577468>] ? x86_64_start_kernel+0x168/0x176 [Wed Jan 4 10:19:12 2017] Task dump for CPU 5: [Wed Jan 4 10:19:12 2017] swapper/5 R running task 0 0 1 0x00200008 [Wed Jan 4 10:19:12 2017] 0006703c8fb28759 ffff881fb261beb0 ffffffff81b34290 00000000b261bec8 [Wed Jan 4 10:19:12 2017] ffff881fbeab2120 ffffffff82558700 ffff881fb261c000 ffffe8ffff4a0800 [Wed Jan 4 10:19:12 2017] ffffffff824b2f40 ffff881fb2618000 ffff881fb261bec0 ffffffff81b34487 [Wed Jan 4 10:19:12 2017] Call Trace: [Wed Jan 4 10:19:12 2017] [<ffffffff81b34290>] ? cpuidle_enter_state+0xf0/0x2b0 [Wed Jan 4 10:19:12 2017] [<ffffffff81b34487>] ? cpuidle_enter+0x17/0x20 [Wed Jan 4 10:19:12 2017] [<ffffffff810c9882>] ? call_cpuidle+0x32/0x60 [Wed Jan 4 10:19:12 2017] [<ffffffff81b34463>] ? cpuidle_select+0x13/0x20 [Wed Jan 4 10:19:12 2017] [<ffffffff810c9b1f>] ? cpu_startup_entry+0x26f/0x310 [Wed Jan 4 10:19:12 2017] [<ffffffff81039e7c>] ? start_secondary+0x12c/0x140 [Wed Jan 4 10:19:12 2017] Task dump for CPU 16: [Wed Jan 4 10:19:12 2017] swapper/16 R running task 0 0 1 0x00200000 [Wed Jan 4 10:19:12 2017] 0006703c8fb238c6 ffff881fb2657eb0 ffffffff81b34290 00000000b2657ec8 [Wed Jan 4 10:19:12 2017] ffff881fbec12120 ffffffff82558700 ffff881fb2658000 ffffe8ffff600800 [Wed Jan 4 10:19:12 2017] ffffffff824b2f40 ffff881fb2654000 ffff881fb2657ec0 ffffffff81b34487 [Wed Jan 4 10:19:12 2017] Call Trace: [Wed Jan 4 10:19:12 2017] [<ffffffff81b34290>] ? cpuidle_enter_state+0xf0/0x2b0 [Wed Jan 4 10:19:12 2017] [<ffffffff81b34487>] ? cpuidle_enter+0x17/0x20 [Wed Jan 4 10:19:12 2017] [<ffffffff810c9882>] ? call_cpuidle+0x32/0x60 [Wed Jan 4 10:19:12 2017] [<ffffffff81b34463>] ? cpuidle_select+0x13/0x20 [Wed Jan 4 10:19:12 2017] [<ffffffff810c9b1f>] ? cpu_startup_entry+0x26f/0x310 [Wed Jan 4 10:19:12 2017] [<ffffffff81039e7c>] ? start_secondary+0x12c/0x140 [Wed Jan 4 10:19:12 2017] Task dump for CPU 17: [Wed Jan 4 10:19:12 2017] swapper/17 R running task 0 0 1 0x00200000 [Wed Jan 4 10:19:12 2017] 0006704a882ddf04 ffff881fb265beb0 ffffffff81b34290 00000000b265bec8 [Wed Jan 4 10:19:12 2017] ffff881fbec32120 ffffffff82558700 ffff881fb265c000 ffffe8ffff620800 [Wed Jan 4 10:19:12 2017] ffffffff824b2f40 ffff881fb2658000 ffff881fb265bec0 ffffffff81b34487 [Wed Jan 4 10:19:12 2017] Call Trace: [Wed Jan 4 10:19:12 2017] [<ffffffff81b34290>] ? cpuidle_enter_state+0xf0/0x2b0 [Wed Jan 4 10:19:12 2017] [<ffffffff81b34487>] ? cpuidle_enter+0x17/0x20 [Wed Jan 4 10:19:12 2017] [<ffffffff810c9882>] ? call_cpuidle+0x32/0x60 [Wed Jan 4 10:19:12 2017] [<ffffffff81b34463>] ? cpuidle_select+0x13/0x20 [Wed Jan 4 10:19:12 2017] [<ffffffff810c9b1f>] ? cpu_startup_entry+0x26f/0x310 [Wed Jan 4 10:19:12 2017] [<ffffffff81039e7c>] ? start_secondary+0x12c/0x140 [Wed Jan 4 10:19:12 2017] Task dump for CPU 19: [Wed Jan 4 10:19:12 2017] swapper/19 R running task 0 0 1 0x00200000 [Wed Jan 4 10:19:12 2017] 0006704a882c2d37 ffff881fb2663eb0 ffffffff81b34290 00000000b2663ec8 [Wed Jan 4 10:19:12 2017] ffff881fbec72120 ffffffff82558700 ffff881fb2664000 ffffe8ffff660800 [Wed Jan 4 10:19:12 2017] ffffffff824b2f40 ffff881fb2660000 ffff881fb2663ec0 ffffffff81b34487 [Wed Jan 4 10:19:12 2017] Call Trace: [Wed Jan 4 10:19:12 2017] [<ffffffff81b34290>] ? cpuidle_enter_state+0xf0/0x2b0 [Wed Jan 4 10:19:12 2017] [<ffffffff81b34487>] ? cpuidle_enter+0x17/0x20 [Wed Jan 4 10:19:12 2017] [<ffffffff810c9882>] ? call_cpuidle+0x32/0x60 [Wed Jan 4 10:19:12 2017] [<ffffffff81b34463>] ? cpuidle_select+0x13/0x20 [Wed Jan 4 10:19:12 2017] [<ffffffff810c9b1f>] ? cpu_startup_entry+0x26f/0x310 [Wed Jan 4 10:19:12 2017] [<ffffffff81039e7c>] ? start_secondary+0x12c/0x140 [Wed Jan 4 10:19:12 2017] Task dump for CPU 20: [Wed Jan 4 10:19:12 2017] swapper/20 R running task 0 0 1 0x00200000 [Wed Jan 4 10:19:12 2017] 0006704a882dd6d4 ffff881fb2667eb0 ffffffff81b34290 00000000b2667ec8 [Wed Jan 4 10:19:12 2017] ffff881fbec92120 ffffffff82558700 ffff881fb2668000 ffffe8ffff680800 [Wed Jan 4 10:19:12 2017] ffffffff824b2f40 ffff881fb2664000 ffff881fb2667ec0 ffffffff81b34487 [Wed Jan 4 10:19:12 2017] Call Trace: [Wed Jan 4 10:19:12 2017] [<ffffffff81b34290>] ? cpuidle_enter_state+0xf0/0x2b0 [Wed Jan 4 10:19:12 2017] [<ffffffff81b34487>] ? cpuidle_enter+0x17/0x20 [Wed Jan 4 10:19:12 2017] [<ffffffff810c9882>] ? call_cpuidle+0x32/0x60 [Wed Jan 4 10:19:12 2017] [<ffffffff81b34463>] ? cpuidle_select+0x13/0x20 [Wed Jan 4 10:19:12 2017] [<ffffffff810c9b1f>] ? cpu_startup_entry+0x26f/0x310 [Wed Jan 4 10:19:12 2017] [<ffffffff81039e7c>] ? start_secondary+0x12c/0x140 [Wed Jan 4 10:19:12 2017] Task dump for CPU 21: [Wed Jan 4 10:19:12 2017] swapper/21 R running task 0 0 1 0x00200008 [Wed Jan 4 10:19:12 2017] 0006703c8fb211c2 ffff881fb266beb0 ffffffff81b34290 00000000b266bec8 [Wed Jan 4 10:19:12 2017] ffff881fbecb2120 ffffffff82558700 ffff881fb266c000 ffffe8ffff6a0800 [Wed Jan 4 10:19:12 2017] ffffffff824b2f40 ffff881fb2668000 ffff881fb266bec0 ffffffff81b34487 [Wed Jan 4 10:19:12 2017] Call Trace: [Wed Jan 4 10:19:12 2017] [<ffffffff81b34290>] ? cpuidle_enter_state+0xf0/0x2b0 [Wed Jan 4 10:19:12 2017] [<ffffffff81b34487>] ? cpuidle_enter+0x17/0x20 [Wed Jan 4 10:19:12 2017] [<ffffffff810c9882>] ? call_cpuidle+0x32/0x60 [Wed Jan 4 10:19:12 2017] [<ffffffff81b34463>] ? cpuidle_select+0x13/0x20 [Wed Jan 4 10:19:12 2017] [<ffffffff810c9b1f>] ? cpu_startup_entry+0x26f/0x310 [Wed Jan 4 10:19:12 2017] [<ffffffff81039e7c>] ? start_secondary+0x12c/0x140 [Wed Jan 4 10:19:12 2017] Task dump for CPU 22: [Wed Jan 4 10:19:12 2017] swapper/22 R running task 0 0 1 0x00200000 [Wed Jan 4 10:19:12 2017] 0006704a882c24c2 ffff881fb266feb0 ffffffff81b34290 00000000b266fec8 [Wed Jan 4 10:19:12 2017] ffff881fbecd2120 ffffffff82558700 ffff881fb2670000 ffffe8ffff6c0800 [Wed Jan 4 10:19:12 2017] ffffffff824b2f40 ffff881fb266c000 ffff881fb266fec0 ffffffff81b34487 [Wed Jan 4 10:19:12 2017] Call Trace: [Wed Jan 4 10:19:12 2017] [<ffffffff81b34290>] ? cpuidle_enter_state+0xf0/0x2b0 [Wed Jan 4 10:19:12 2017] [<ffffffff81b34487>] ? cpuidle_enter+0x17/0x20 [Wed Jan 4 10:19:12 2017] [<ffffffff810c9882>] ? call_cpuidle+0x32/0x60 [Wed Jan 4 10:19:12 2017] [<ffffffff81b34463>] ? cpuidle_select+0x13/0x20 [Wed Jan 4 10:19:12 2017] [<ffffffff810c9b1f>] ? cpu_startup_entry+0x26f/0x310 [Wed Jan 4 10:19:12 2017] [<ffffffff81039e7c>] ? start_secondary+0x12c/0x140 [Wed Jan 4 10:19:12 2017] Task dump for CPU 23: [Wed Jan 4 10:19:12 2017] swapper/23 R running task 0 0 1 0x00200000 [Wed Jan 4 10:19:12 2017] 0006704a882dea33 ffff881fb2683eb0 ffffffff81b34290 00000000b2683ec8 [Wed Jan 4 10:19:12 2017] ffff881fbecf2120 ffffffff82558700 ffff881fb2684000 ffffe8ffff6e0800 [Wed Jan 4 10:19:12 2017] ffffffff824b2f40 ffff881fb2680000 ffff881fb2683ec0 ffffffff81b34487 [Wed Jan 4 10:19:12 2017] Call Trace: [Wed Jan 4 10:19:12 2017] [<ffffffff81b34290>] ? cpuidle_enter_state+0xf0/0x2b0 [Wed Jan 4 10:19:12 2017] [<ffffffff81b34487>] ? cpuidle_enter+0x17/0x20 [Wed Jan 4 10:19:12 2017] [<ffffffff810c9882>] ? call_cpuidle+0x32/0x60 [Wed Jan 4 10:19:12 2017] [<ffffffff81b34463>] ? cpuidle_select+0x13/0x20 [Wed Jan 4 10:19:12 2017] [<ffffffff810c9b1f>] ? cpu_startup_entry+0x26f/0x310 [Wed Jan 4 10:19:12 2017] [<ffffffff81039e7c>] ? start_secondary+0x12c/0x140 [Wed Jan 4 10:19:12 2017] Task dump for CPU 24: [Wed Jan 4 10:19:12 2017] swapper/24 R running task 0 0 1 0x00200000 [Wed Jan 4 10:19:12 2017] 0006704a882dd577 ffff881fb2687eb0 ffffffff81b34290 00000000b2687ec8 [Wed Jan 4 10:19:12 2017] ffff881fbed12120 ffffffff82558700 ffff881fb2688000 ffffe8ffff700800 [Wed Jan 4 10:19:12 2017] ffffffff824b2f40 ffff881fb2684000 ffff881fb2687ec0 ffffffff81b34487 [Wed Jan 4 10:19:12 2017] Call Trace: [Wed Jan 4 10:19:12 2017] [<ffffffff81b34290>] ? cpuidle_enter_state+0xf0/0x2b0 [Wed Jan 4 10:19:12 2017] [<ffffffff81b34487>] ? cpuidle_enter+0x17/0x20 [Wed Jan 4 10:19:12 2017] [<ffffffff810c9882>] ? call_cpuidle+0x32/0x60 [Wed Jan 4 10:19:12 2017] [<ffffffff81b34463>] ? cpuidle_select+0x13/0x20 [Wed Jan 4 10:19:12 2017] [<ffffffff810c9b1f>] ? cpu_startup_entry+0x26f/0x310 [Wed Jan 4 10:19:12 2017] [<ffffffff81039e7c>] ? start_secondary+0x12c/0x140 [Wed Jan 4 10:19:12 2017] Task dump for CPU 25: [Wed Jan 4 10:19:12 2017] swapper/25 R running task 0 0 1 0x00200000 [Wed Jan 4 10:19:12 2017] 0006704a882c2e94 ffff881fb2693eb0 ffffffff81b34290 00000000b2693ec8 [Wed Jan 4 10:19:12 2017] ffff881fbed32120 ffffffff82558700 ffff881fb2694000 ffffe8ffff720800 [Wed Jan 4 10:19:12 2017] ffffffff824b2f40 ffff881fb2690000 ffff881fb2693ec0 ffffffff81b34487 [Wed Jan 4 10:19:12 2017] Call Trace: [Wed Jan 4 10:19:12 2017] [<ffffffff81b34290>] ? cpuidle_enter_state+0xf0/0x2b0 [Wed Jan 4 10:19:12 2017] [<ffffffff81b34487>] ? cpuidle_enter+0x17/0x20 [Wed Jan 4 10:19:12 2017] [<ffffffff810c9882>] ? call_cpuidle+0x32/0x60 [Wed Jan 4 10:19:12 2017] [<ffffffff81b34463>] ? cpuidle_select+0x13/0x20 [Wed Jan 4 10:19:12 2017] [<ffffffff810c9b1f>] ? cpu_startup_entry+0x26f/0x310 [Wed Jan 4 10:19:12 2017] [<ffffffff81039e7c>] ? start_secondary+0x12c/0x140 [Wed Jan 4 10:19:12 2017] Task dump for CPU 26: [Wed Jan 4 10:19:12 2017] swapper/26 R running task 0 0 1 0x00200000 [Wed Jan 4 10:19:12 2017] 0006704a882ddda7 ffff881fb2697eb0 ffffffff81b34290 00000000b2697ec8 [Wed Jan 4 10:19:12 2017] ffff881fbed52120 ffffffff82558700 ffff881fb2698000 ffffe8ffff740800 [Wed Jan 4 10:19:12 2017] ffffffff824b2f40 ffff881fb2694000 ffff881fb2697ec0 ffffffff81b34487 [Wed Jan 4 10:19:12 2017] Call Trace: [Wed Jan 4 10:19:12 2017] [<ffffffff81b34290>] ? cpuidle_enter_state+0xf0/0x2b0 [Wed Jan 4 10:19:12 2017] [<ffffffff81b34487>] ? cpuidle_enter+0x17/0x20 [Wed Jan 4 10:19:12 2017] [<ffffffff810c9882>] ? call_cpuidle+0x32/0x60 [Wed Jan 4 10:19:12 2017] [<ffffffff81b34463>] ? cpuidle_select+0x13/0x20 [Wed Jan 4 10:19:12 2017] [<ffffffff810c9b1f>] ? cpu_startup_entry+0x26f/0x310 [Wed Jan 4 10:19:12 2017] [<ffffffff81039e7c>] ? start_secondary+0x12c/0x140 [Wed Jan 4 10:19:12 2017] Task dump for CPU 27: [Wed Jan 4 10:19:12 2017] swapper/27 R running task 0 0 1 0x00200000 [Wed Jan 4 10:19:12 2017] 0006704a882dc819 ffff881fb269beb0 ffffffff81b34290 00000000b269bec8 [Wed Jan 4 10:19:12 2017] ffff881fbed72120 ffffffff82558700 ffff881fb269c000 ffffe8ffff760800 [Wed Jan 4 10:19:12 2017] ffffffff824b2f40 ffff881fb2698000 ffff881fb269bec0 ffffffff81b34487 [Wed Jan 4 10:19:12 2017] Call Trace: [Wed Jan 4 10:19:12 2017] [<ffffffff81b34290>] ? cpuidle_enter_state+0xf0/0x2b0 [Wed Jan 4 10:19:12 2017] [<ffffffff81b34487>] ? cpuidle_enter+0x17/0x20 [Wed Jan 4 10:19:12 2017] [<ffffffff810c9882>] ? call_cpuidle+0x32/0x60 [Wed Jan 4 10:19:12 2017] [<ffffffff81b34463>] ? cpuidle_select+0x13/0x20 [Wed Jan 4 10:19:12 2017] [<ffffffff810c9b1f>] ? cpu_startup_entry+0x26f/0x310 [Wed Jan 4 10:19:12 2017] [<ffffffff81039e7c>] ? start_secondary+0x12c/0x140 [Wed Jan 4 10:19:12 2017] Task dump for CPU 30: [Wed Jan 4 10:19:12 2017] swapper/30 R running task 0 0 1 0x00200000 [Wed Jan 4 10:19:12 2017] 0006704a882de61c ffff881fb26a7eb0 ffffffff81b34290 00000000b26a7ec8 [Wed Jan 4 10:19:12 2017] ffff881fbedd2120 ffffffff82558700 ffff881fb26a8000 ffffe8ffff7c0800 [Wed Jan 4 10:19:12 2017] ffffffff824b2f40 ffff881fb26a4000 ffff881fb26a7ec0 ffffffff81b34487 [Wed Jan 4 10:19:12 2017] Call Trace: [Wed Jan 4 10:19:12 2017] [<ffffffff81b34290>] ? cpuidle_enter_state+0xf0/0x2b0 [Wed Jan 4 10:19:12 2017] [<ffffffff81b34487>] ? cpuidle_enter+0x17/0x20 [Wed Jan 4 10:19:12 2017] [<ffffffff810c9882>] ? call_cpuidle+0x32/0x60 [Wed Jan 4 10:19:12 2017] [<ffffffff81b34463>] ? cpuidle_select+0x13/0x20 [Wed Jan 4 10:19:12 2017] [<ffffffff810c9b1f>] ? cpu_startup_entry+0x26f/0x310 [Wed Jan 4 10:19:12 2017] [<ffffffff81039e7c>] ? start_secondary+0x12c/0x140 [Wed Jan 4 10:19:12 2017] Task dump for CPU 31: [Wed Jan 4 10:19:12 2017] swapper/31 R running task 0 0 1 0x00200000 [Wed Jan 4 10:19:12 2017] 0006704a882dee05 ffff881fb26abeb0 ffffffff81b34290 00000000b26abec8 [Wed Jan 4 10:19:12 2017] ffff881fbedf2120 ffffffff82558700 ffff881fb26ac000 ffffe8ffff7e0800 [Wed Jan 4 10:19:12 2017] ffffffff824b2f40 ffff881fb26a8000 ffff881fb26abec0 ffffffff81b34487 [Wed Jan 4 10:19:12 2017] Call Trace: [Wed Jan 4 10:19:12 2017] [<ffffffff81b34290>] ? cpuidle_enter_state+0xf0/0x2b0 [Wed Jan 4 10:19:12 2017] [<ffffffff81b34487>] ? cpuidle_enter+0x17/0x20 [Wed Jan 4 10:19:12 2017] [<ffffffff810c9882>] ? call_cpuidle+0x32/0x60 [Wed Jan 4 10:19:12 2017] [<ffffffff81b34463>] ? cpuidle_select+0x13/0x20 [Wed Jan 4 10:19:12 2017] [<ffffffff810c9b1f>] ? cpu_startup_entry+0x26f/0x310 [Wed Jan 4 10:19:12 2017] [<ffffffff81039e7c>] ? start_secondary+0x12c/0x140 [Wed Jan 4 10:19:12 2017] rcu_sched kthread starved for 60004 jiffies! g61967937 c61967936 f0x0 s3 ->state=0x1 Do any know can help me to diagnose the problem and how to resolve it ? I spoke with few friends and they trying to convince me the problem is in CPU. I did not believe after a 3 years working CPU suddenly stop working correctly. I probably did not provide much information, but I did not write to kernel mailing list a few years. Regards, Mitko
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