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Groups > linux.kernel > #1631226 > unrolled thread
| Started by | Mike Galbraith <efault@gmx.de> |
|---|---|
| First post | 2017-04-26 10:20 +0200 |
| Last post | 2017-04-26 10:30 +0200 |
| Articles | 6 on this page of 26 — 5 participants |
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x86-tip tsc/tick gripage Mike Galbraith <efault@gmx.de> - 2017-04-26 10:20 +0200
Re: x86-tip tsc/tick gripage Ingo Molnar <mingo@kernel.org> - 2017-04-26 10:30 +0200
Re: x86-tip tsc/tick gripage Mike Galbraith <efault@gmx.de> - 2017-04-26 10:40 +0200
Re: x86-tip tsc/tick gripage Mike Galbraith <efault@gmx.de> - 2017-04-26 11:10 +0200
Re: x86-tip tsc/tick gripage Mike Galbraith <efault@gmx.de> - 2017-04-26 11:50 +0200
Re: x86-tip tsc/tick gripage Peter Zijlstra <peterz@infradead.org> - 2017-04-26 12:30 +0200
Re: x86-tip tsc/tick gripage Mike Galbraith <efault@gmx.de> - 2017-04-26 13:50 +0200
Re: x86-tip tsc/tick gripage Mike Galbraith <efault@gmx.de> - 2017-04-26 14:40 +0200
Re: x86-tip tsc/tick gripage Mike Galbraith <efault@gmx.de> - 2017-04-26 20:20 +0200
Re: x86-tip tsc/tick gripage Mike Galbraith <efault@gmx.de> - 2017-04-27 07:30 +0200
[patch] timer: Fix timers_update_migration(), and call it in tmigr_init() Mike Galbraith <efault@gmx.de> - 2017-04-29 18:10 +0200
Re: [patch] timer: Fix timers_update_migration(), and call it in tmigr_init() "Paul E. McKenney" <paulmck@linux.vnet.ibm.com> - 2017-04-29 20:10 +0200
Re: [patch] timer: Fix timers_update_migration(), and call it in tmigr_init() Mike Galbraith <efault@gmx.de> - 2017-04-29 20:30 +0200
Re: [patch] timer: Fix timers_update_migration(), and call it in tmigr_init() "Paul E. McKenney" <paulmck@linux.vnet.ibm.com> - 2017-04-29 23:50 +0200
Re: [patch] timer: Fix timers_update_migration(), and call it in tmigr_init() Mike Galbraith <efault@gmx.de> - 2017-04-30 03:30 +0200
Re: [patch] timer: Fix timers_update_migration(), and call it in tmigr_init() "Paul E. McKenney" <paulmck@linux.vnet.ibm.com> - 2017-04-30 05:50 +0200
Re: [patch] timer: Fix timers_update_migration(), and call it in tmigr_init() Mike Galbraith <efault@gmx.de> - 2017-04-30 06:30 +0200
Re: [patch] timer: Fix timers_update_migration(), and call it in tmigr_init() "Paul E. McKenney" <paulmck@linux.vnet.ibm.com> - 2017-04-30 06:40 +0200
Re: [patch] timer: Fix timers_update_migration(), and call it in tmigr_init() "Paul E. McKenney" <paulmck@linux.vnet.ibm.com> - 2017-05-01 00:50 +0200
Re: [patch] timer: Fix timers_update_migration(), and call it in tmigr_init() Thomas Gleixner <tglx@linutronix.de> - 2017-05-01 10:00 +0200
Re: [patch] timer: Fix timers_update_migration(), and call it in tmigr_init() "Paul E. McKenney" <paulmck@linux.vnet.ibm.com> - 2017-05-01 21:40 +0200
Re: [patch] timer: Fix timers_update_migration(), and call it in tmigr_init() Mike Galbraith <efault@gmx.de> - 2017-04-30 07:10 +0200
[patch] Re: x86-tip tsc/tick gripage Mike Galbraith <efault@gmx.de> - 2017-04-28 09:40 +0200
Re: [patch] Re: x86-tip tsc/tick gripage Mike Galbraith <efault@gmx.de> - 2017-04-28 10:50 +0200
Re: [patch] Re: x86-tip tsc/tick gripage Mike Galbraith <efault@gmx.de> - 2017-04-28 16:20 +0200
Re: x86-tip tsc/tick gripage Mike Galbraith <efault@gmx.de> - 2017-04-26 10:30 +0200
Page 2 of 2 — ← Prev page 1 [2]
| From | "Paul E. McKenney" <paulmck@linux.vnet.ibm.com> |
|---|---|
| Date | 2017-05-01 21:40 +0200 |
| Subject | Re: [patch] timer: Fix timers_update_migration(), and call it in tmigr_init() |
| Message-ID | <tCpkS-4KF-31@gated-at.bofh.it> |
| In reply to | #1633571 |
On Mon, May 01, 2017 at 09:54:10AM +0200, Thomas Gleixner wrote: > On Sun, 30 Apr 2017, Paul E. McKenney wrote: > > > > And sadly, the splats are still there. Please see the following for > > the relevant console output and .config files: > > Right. We are working on fixing the issues. I'll zap it from tip for now. In case it helps... I looked over the rest of the rcutorture scenarios, and it looks like the problems occur for NO_HZ_FULL and more than two CPUs (though larger numbers of CPUs might well just be increasing the probability of this happening). The TEST07 scenario (which had the segfaults) also had CPU hotplug enabled, but !NO_HZ_FULL scenarios with CPU hotplug enabled did just fine (or at least had a much lower probability of occurrence). Thanx, Paul
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| From | Mike Galbraith <efault@gmx.de> |
|---|---|
| Date | 2017-04-30 07:10 +0200 |
| Subject | Re: [patch] timer: Fix timers_update_migration(), and call it in tmigr_init() |
| Message-ID | <tBPhn-7vt-1@gated-at.bofh.it> |
| In reply to | #1633375 |
On Sun, 2017-04-30 at 06:20 +0200, Mike Galbraith wrote:
> On Sat, 2017-04-29 at 20:43 -0700, Paul E. McKenney wrote:
> > On Sun, Apr 30, 2017 at 03:21:58AM +0200, Mike Galbraith wrote:
> > > On Sat, 2017-04-29 at 14:45 -0700, Paul E. McKenney wrote:
> > > > On Sat, Apr 29, 2017 at 08:20:33PM +0200, Mike Galbraith wrote:
> > > > > On Sat, 2017-04-29 at 11:06 -0700, Paul E. McKenney wrote:
> > > > >
> > > > > > If someone will either repost a fresh series or point me at
> > > > > > exactly
> > > > > > the set of patches to use, I will run it through rcutorture
> > > > > > again.
> > > > >
> > > > > Patchlet is against x86-tip/master.today.
> > > >
> > > > So today's (as in Saturday April 29) x86-tip/master with the
> > > > following
> > > > patch applied?
> > >
> > > Yeah.
> >
> > OK, will fire it up once the current set of overnight tests
> > complete.
>
> I certainly don't want to discourage you from beating hell outta tip,
> just want to make sure you know that I'm seeing zero RCU woes, only
> late timer expiry (sharpening rocks/sticks to focus trace).
Ah, seems a cpu shutting down the tick can race with add_timer_on(),
leaving the timer stranded until some other event kicks the cpu awake.
<idle>-0 [025] d..4 92.087954: tmigr_group_set_cpu_active: group=ffff88017d03d000 lvl=1 numa=-1 active=1 migrator=25 num_childs=8 parent= (null) nextevt=125916000000 evtcpu=2
<idle>-0 [025] d..4 92.087956: tmigr_group_removeevt: group=ffff88017d03d000 lvl=1 numa=-1 active=1 migrator=25 num_childs=8 parent= (null) nextevt=125916000000 evtcpu=2
<idle>-0 [025] d..3 92.087956: tmigr_group_set_cpu_active: group=ffff880179cd1000 lvl=0 numa=3 active=1 migrator=25 num_childs=8 parent=ffff88017d03d000 nextevt=316380000000 evtcpu=27
<idle>-0 [025] d..3 92.087957: tmigr_group_removeevt: group=ffff880179cd1000 lvl=0 numa=3 active=1 migrator=25 num_childs=8 parent=ffff88017d03d000 nextevt=316380000000 evtcpu=27
<idle>-0 [025] d.h3 92.087959: hrtimer_cancel: hrtimer=ffff880277455d20
<idle>-0 [025] d.h2 92.087959: hrtimer_expire_entry: hrtimer=ffff880277455d20 function=tick_sched_timer now=91100168287
<idle>-0 [025] d.h2 92.087964: hrtimer_expire_exit: hrtimer=ffff880277455d20
<idle>-0 [025] d.s3 92.087968: timer_cancel: timer=ffffffff820dd640
<idle>-0 [025] ..s2 92.087969: timer_expire_entry: timer=ffffffff820dd640 function=clocksource_watchdog now=4294915072
<idle>-0 [025] d.s4 92.087971: timer_start: timer=ffffffff820dd640 function=clocksource_watchdog expires=4294915197 [timeout=125] cpu=26 idx=218 flags=
<idle>-0 [025] d.s3 92.087974: wake_up_idle_cpu: NO KICK 26 - !set_nr_and_not_polling(rq->idle)
<idle>-0 [025] ..s2 92.087974: timer_expire_exit: timer=ffffffff820dd640
<idle>-0 [025] .Ns2 92.087982: tmigr_handle_remote: group=ffff880179cd1000 lvl=0 numa=3 active=1 migrator=25 num_childs=8 parent=ffff88017d03d000 nextevt=316380000000 evtcpu=27 cpu=25
<idle>-0 [025] .Ns2 92.087982: tmigr_handle_remote: group=ffff88017d03d000 lvl=1 numa=-1 active=1 migrator=25 num_childs=8 parent= (null) nextevt=125916000000 evtcpu=2 cpu=25
<idle>-0 [025] dN.3 92.087995: hrtimer_start: hrtimer=ffff880277455d20 function=tick_sched_timer expires=91104000000 softexpires=91104000000
<idle>-0 [026] dN.3 92.088009: tmigr_group_set_cpu_active: group=ffff880179cd1000 lvl=0 numa=3 active=2 migrator=25 num_childs=8 parent=ffff88017d03d000 nextevt=316380000000 evtcpu=27
<idle>-0 [026] dN.3 92.088011: tmigr_group_removeevt: group=ffff880179cd1000 lvl=0 numa=3 active=2 migrator=25 num_childs=8 parent=ffff88017d03d000 nextevt=316380000000 evtcpu=27
<idle>-0 [025] d..4 92.088016: tmigr_group_addevt: group=ffff880179cd1000 lvl=0 numa=3 active=1 migrator=25 num_childs=8 parent=ffff88017d03d000 nextevt=316380000000 evtcpu=27
<idle>-0 [026] dN.3 92.088016: hrtimer_start: hrtimer=ffff880277495d20 function=tick_sched_timer expires=91104000000 softexpires=91104000000
<idle>-0 [025] d..5 92.088017: tmigr_group_set_cpu_inactive: group=ffff88017d03d000 lvl=1 numa=-1 active=1 migrator=26 num_childs=8 parent= (null) nextevt=125916000000 evtcpu=2
<idle>-0 [025] d..4 92.088017: tmigr_group_set_cpu_inactive: group=ffff880179cd1000 lvl=0 numa=3 active=1 migrator=26 num_childs=8 parent=ffff88017d03d000 nextevt=316380000000 evtcpu=27
<idle>-0 [025] d..2 92.088018: tick_stop: success=1 dependency=NONE
<idle>-0 [025] d..3 92.088018: hrtimer_cancel: hrtimer=ffff880277455d20
<idle>-0 [025] d..3 92.088020: hrtimer_start: hrtimer=ffff880277455d20 function=tick_sched_timer expires=125916000000 softexpires=125916000000
<idle>-0 [026] d..4 92.088022: tmigr_group_addevt: group=ffff880179cd1000 lvl=0 numa=3 active=0 migrator=26 num_childs=8 parent=ffff88017d03d000 nextevt=316380000000 evtcpu=27
<idle>-0 [026] d..5 92.088023: tmigr_group_addevt: group=ffff88017d03d000 lvl=1 numa=-1 active=0 migrator=26 num_childs=8 parent= (null) nextevt=125916000000 evtcpu=2
<idle>-0 [026] d..5 92.088024: tmigr_group_set_cpu_inactive: group=ffff88017d03d000 lvl=1 numa=-1 active=0 migrator=-1 num_childs=8 parent= (null) nextevt=125916000000 evtcpu=2
<idle>-0 [026] d..4 92.088025: tmigr_group_set_cpu_inactive: group=ffff880179cd1000 lvl=0 numa=3 active=0 migrator=-1 num_childs=8 parent=ffff88017d03d000 nextevt=316380000000 evtcpu=27
<idle>-0 [026] d..2 92.088025: tick_stop: success=1 dependency=NONE
<idle>-0 [026] d..3 92.088026: hrtimer_cancel: hrtimer=ffff880277495d20
<idle>-0 [026] d..3 92.088027: hrtimer_start: hrtimer=ffff880277495d20 function=tick_sched_timer expires=93148000000 softexpires=93148000000
<idle>-0 [026] d..4 94.135877: tmigr_group_set_cpu_active: group=ffff88017d03d000 lvl=1 numa=-1 active=2 migrator=1 num_childs=8 parent= (null) nextevt=316380000000 evtcpu=56
<idle>-0 [026] d..4 94.135879: tmigr_group_removeevt: group=ffff88017d03d000 lvl=1 numa=-1 active=2 migrator=1 num_childs=8 parent= (null) nextevt=316380000000 evtcpu=56
<idle>-0 [026] d..3 94.135879: tmigr_group_set_cpu_active: group=ffff880179cd1000 lvl=0 numa=3 active=1 migrator=26 num_childs=8 parent=ffff88017d03d000 nextevt=316380000000 evtcpu=27
<idle>-0 [026] d..3 94.135880: tmigr_group_removeevt: group=ffff880179cd1000 lvl=0 numa=3 active=1 migrator=26 num_childs=8 parent=ffff88017d03d000 nextevt=316380000000 evtcpu=27
<idle>-0 [026] d.h3 94.135881: hrtimer_cancel: hrtimer=ffff880277495d20
<idle>-0 [026] d.h2 94.135882: hrtimer_expire_entry: hrtimer=ffff880277495d20 function=tick_sched_timer now=93148247903
<idle>-0 [026] d.h2 94.136137: hrtimer_expire_exit: hrtimer=ffff880277495d20
<idle>-0 [026] d.s3 94.136141: timer_cancel: timer=ffffffff820dd640
<idle>-0 [026] ..s2 94.136141: timer_expire_entry: timer=ffffffff820dd640 function=clocksource_watchdog now=4294915584
<idle>-0 [026] d.s4 94.136144: timer_start: timer=ffffffff820dd640 function=clocksource_watchdog expires=4294915709 [timeout=125] cpu=27 idx=219 flags=
<idle>-0 [026] d.s3 94.136146: wake_up_idle_cpu: KICK 27
<idle>-0 [026] ..s1 94.136148: clocksource_watchdog: LATE by 387 ticks
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| From | Mike Galbraith <efault@gmx.de> |
|---|---|
| Date | 2017-04-28 09:40 +0200 |
| Subject | [patch] Re: x86-tip tsc/tick gripage |
| Message-ID | <tB8Fr-4jD-11@gated-at.bofh.it> |
| In reply to | #1631412 |
On Wed, 2017-04-26 at 13:39 +0200, Mike Galbraith wrote: > On Wed, 2017-04-26 at 12:26 +0200, Peter Zijlstra wrote: > > On Wed, Apr 26, 2017 at 10:57:42AM +0200, Mike Galbraith wrote: > > > > > Both still lose their TSC. > > > > > > [ 11.982468] tsc: Refined TSC clocksource calibration: 2260.999 MHz > > > [ 11.994275] clocksource: tsc: mask: 0xffffffffffffffff max_cycles: 0x20974a4d8bb, max_idle_ns: 440795246623 ns > > > [ 13.064172] clocksource: Switched to clocksource tsc > > > [ 240.247851] clocksource: timekeeping watchdog on CPU23: Marking clocksource 'tsc' as unstable because the skew is too large: > > > [ 240.462501] clocksource: 'tsc' cs_now: 108fe5be09f cs_last: b90a6a0676 mask: ffffffffffffffff > > > [ 240.675057] tsc: Marking TSC unstable due to clocksource watchdog > > > > > > And they didn't use to? We don't typically write to TSC or TSC_ADJUST > > and thus would not cause such behaviour. > > Nope. The DL980 is my RT jitter test box, which I use all the time. I found evidence of lysdexia at play (hunk 2), below is an RFFS (frozen shark) which makes my DL980 a happy camper with tip. timer/nohz: Call tick_tmigr_idle() with proper parameter order Extremely late timer expiration soon leads to the clocksource watchdog killing the TSC clocksource on multisocket boxen. Call tmigr_cpu_idle( ) with proper parameter order, and pass next_local to tmigr_cpu_idle() so it can return what it says it returns. Signed-off-by: Mike Galbraith <efault@gmx.de> Fixes: ec2206b91d43 timer: Implement the hierarchical pull model --- kernel/time/tick-sched.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) --- a/kernel/time/tick-sched.c +++ b/kernel/time/tick-sched.c @@ -695,7 +695,7 @@ tick_tmigr_idle(struct tick_sched *ts, u if (next_global >= next_local) next_global = KTIME_MAX; - next_global = tmigr_cpu_idle(next_global); + next_local = tmigr_cpu_idle(next_local); return min_t(u64, next_local, next_global); } @@ -768,7 +768,7 @@ static ktime_t tick_nohz_stop_sched_tick */ delta = next_local - basemono; if (delta > (u64)TICK_NSEC) - next_local = tick_tmigr_idle(ts, next_local, next_global); + next_local = tick_tmigr_idle(ts, next_global, next_local); ts->next_timer = next_local;
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| From | Mike Galbraith <efault@gmx.de> |
|---|---|
| Date | 2017-04-28 10:50 +0200 |
| Subject | Re: [patch] Re: x86-tip tsc/tick gripage |
| Message-ID | <tB9Lb-4Zj-3@gated-at.bofh.it> |
| In reply to | #1632582 |
> On Fri, 2017-04-28 at 09:35 +0200, Mike Galbraith wrote: > ...which makes my DL980 a happy camper with tip. Bah, nevermind. I forgot to restore command line.
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| From | Mike Galbraith <efault@gmx.de> |
|---|---|
| Date | 2017-04-28 16:20 +0200 |
| Subject | Re: [patch] Re: x86-tip tsc/tick gripage |
| Message-ID | <tBeUy-8u3-3@gated-at.bofh.it> |
| In reply to | #1632659 |
On Fri, 2017-04-28 at 10:45 +0200, Mike Galbraith wrote: > Bah, nevermind. I forgot to restore command line. Well how 'bout that, it's not only old multi-socket boxen. I just reproduced on my i4790 desktop box. Boot virgin tip to init 3 with nowatchdog on command line, let box idle... [ 316.387436] clocksource: timekeeping watchdog on CPU7: Marking clocksource 'tsc' as unstable because the skew is too large: [ 316.393887] clocksource: 'hpet' wd_now: e05e937 wd_last: 75c4e7c8 mask: ffffffff [ 316.400491] clocksource: 'tsc' cs_now: 12134c63e80 cs_last: 8c0439451e mask: ffffffffffffffff [ 316.406899] sched_clock: Marking unstable (316377815439, 9598524)<-(316386903152, 510811) [ 316.413257] tsc: Marking TSC unstable due to clocksource watchdog [ 316.419223] clocksource: Switched to clocksource hpet
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| From | Mike Galbraith <efault@gmx.de> |
|---|---|
| Date | 2017-04-26 10:30 +0200 |
| Message-ID | <tAquJ-87M-7@gated-at.bofh.it> |
| In reply to | #1631226 |
On Wed, 2017-04-26 at 10:02 +0200, Mike Galbraith wrote: > tip v4.11-rc8-893-g8ec9e12aff06, trusty ole 8 socket (X7560) DL980 G7 Ew, DL980 then turned into unhappy RCU camper. [ 316.980923] basemono: 316956000000 ts->next_tick: 316380000000 dev->next_event: 316956005002 [ 689.893122] INFO: rcu_sched detected stalls on CPUs/tasks: [ 689.897115] 6-...: (1456 GPs behind) idle=114/0/0 softirq=935/935 fqs=0 [ 689.897115] 7-...: (11 GPs behind) idle=358/0/0 softirq=1724/1724 fqs=0 [ 689.897115] 8-...: (11 GPs behind) idle=5ac/0/0 softirq=1618/1619 fqs=0 [ 689.897115] 9-...: (13 GPs behind) idle=318/0/0 softirq=500/500 fqs=0 [ 689.897115] 10-...: (2045 GPs behind) idle=42c/0/0 softirq=480/480 fqs=0 [ 689.897115] 12-...: (5442 GPs behind) idle=270/0/0 softirq=437/437 fqs=0 [ 689.897115] 13-...: (418 GPs behind) idle=844/0/0 softirq=449/449 fqs=0 [ 689.897115] 14-...: (14 GPs behind) idle=95c/0/0 softirq=508/509 fqs=0 [ 689.897115] 15-...: (14 GPs behind) idle=b78/0/0 softirq=475/476 fqs=0 [ 689.897115] 16-...: (9825 GPs behind) idle=22c/0/0 softirq=1308/1308 fqs=0 [ 689.897115] 17-...: (10286 GPs behind) idle=454/0/0 softirq=402/402 fqs=0 [ 689.897115] 18-...: (6734 GPs behind) idle=8e0/0/0 softirq=440/440 fqs=0 [ 689.897115] 19-...: (6734 GPs behind) idle=604/0/0 softirq=378/378 fqs=0 [ 689.897115] 22-...: (5162 GPs behind) idle=3c8/0/0 softirq=391/391 fqs=0 [ 689.897115] 24-...: (229 GPs behind) idle=3d0/0/0 softirq=1470/1470 fqs=0 [ 689.897115] 25-...: (9809 GPs behind) idle=2f0/0/0 softirq=436/436 fqs=0 [ 689.897115] 26-...: (9809 GPs behind) idle=418/0/0 softirq=413/413 fqs=0 [ 689.897115] 27-...: (9809 GPs behind) idle=458/0/0 softirq=438/438 fqs=0 [ 689.897115] 28-...: (9809 GPs behind) idle=dd4/0/0 softirq=494/494 fqs=0 [ 689.897115] 29-...: (9572 GPs behind) idle=3fc/0/0 softirq=400/400 fqs=0 [ 689.897115] 30-...: (4950 GPs behind) idle=084/0/0 softirq=422/422 fqs=0 [ 689.897115] 31-...: (4993 GPs behind) idle=ba4/0/0 softirq=366/366 fqs=0 [ 689.897115] 32-...: (2048 GPs behind) idle=608/0/0 softirq=1258/1259 fqs=0 [ 689.897115] 33-...: (2046 GPs behind) idle=f14/0/0 softirq=1267/1268 fqs=0 [ 689.897115] 34-...: (0 ticks this GP) idle=950/0/0 softirq=357/357 fqs=0 [ 689.897115] 35-...: (9813 GPs behind) idle=7a8/0/0 softirq=301/301 fqs=0 [ 689.897115] 36-...: (9813 GPs behind) idle=5c0/0/0 softirq=299/299 fqs=0 [ 689.897115] 37-...: (9828 GPs behind) idle=478/0/0 softirq=286/286 fqs=0 [ 689.897115] 38-...: (0 ticks this GP) idle=8d4/0/0 softirq=307/307 fqs=0 [ 689.897115] 39-...: (2048 GPs behind) idle=2ac/0/0 softirq=304/305 fqs=0 [ 689.897115] 40-...: (0 ticks this GP) idle=bd0/0/0 softirq=1184/1184 fqs=0 [ 689.897115] 41-...: (428 GPs behind) idle=d14/0/0 softirq=339/339 fqs=0 [ 689.897115] 42-...: (243 GPs behind) idle=c38/0/0 softirq=338/338 fqs=0 [ 689.897115] 43-...: (9809 GPs behind) idle=870/0/0 softirq=289/289 fqs=0 [ 689.897115] 46-...: (9815 GPs behind) idle=654/0/0 softirq=261/261 fqs=0 [ 689.897115] 47-...: (2134 GPs behind) idle=c98/0/0 softirq=303/303 fqs=0 [ 689.897115] 48-...: (571 GPs behind) idle=4c0/0/0 softirq=1135/1135 fqs=0 [ 689.897115] 49-...: (2211 GPs behind) idle=bcc/0/0 softirq=267/267 fqs=0 [ 689.897115] 50-...: (2195 GPs behind) idle=334/0/0 softirq=232/233 fqs=0 [ 689.897115] 51-...: (97 GPs behind) idle=e30/0/0 softirq=374/374 fqs=0 [ 689.897115] 52-...: (252 GPs behind) idle=c14/0/0 softirq=207/208 fqs=0 [ 689.897115] 53-...: (0 ticks this GP) idle=dd4/0/0 softirq=218/218 fqs=0 [ 689.897115] 54-...: (526 GPs behind) idle=ce8/0/0 softirq=292/293 fqs=0 [ 689.897115] 55-...: (573 GPs behind) idle=924/0/0 softirq=191/192 fqs=0 [ 689.897115] 56-...: (68 GPs behind) idle=028/0/0 softirq=1141/1141 fqs=0 [ 689.897115] 57-...: (5442 GPs behind) idle=f48/0/0 softirq=319/319 fqs=0 [ 689.897115] 58-...: (5211 GPs behind) idle=18c/0/0 softirq=185/185 fqs=0 [ 689.897115] 59-...: (255 GPs behind) idle=a30/0/0 softirq=276/277 fqs=0 [ 689.897115] 60-...: (5442 GPs behind) idle=e54/0/0 softirq=155/155 fqs=0 [ 689.897115] 61-...: (5151 GPs behind) idle=270/0/0 softirq=169/170 fqs=0 [ 689.897115] 62-...: (9819 GPs behind) idle=c50/0/0 softirq=116/116 fqs=0 [ 689.897115] 63-...: (2195 GPs behind) idle=e4c/0/0 softirq=141/142 fqs=0 [ 689.897115] (detected by 2, t=15689 jiffies, g=12275, c=12274, q=520) [ 689.897115] Sending NMI from CPU 2 to CPUs 6: [ 693.749331] NMI backtrace for cpu 6 skipped: idling at pc 0xffffffff8167bcc6 [ 689.897115] Sending NMI from CPU 2 to CPUs 7: [ 693.750354] NMI backtrace for cpu 7 skipped: idling at pc 0xffffffff8167bcc6 [ 689.897115] Sending NMI from CPU 2 to CPUs 8: [ 693.751358] NMI backtrace for cpu 8 skipped: idling at pc 0xffffffff8167bdc8 [ 689.897115] Sending NMI from CPU 2 to CPUs 9: [ 693.752357] NMI backtrace for cpu 9 skipped: idling at pc 0xffffffff8167bcc6 [ 689.897115] Sending NMI from CPU 2 to CPUs 10: [ 693.753360] NMI backtrace for cpu 10 skipped: idling at pc 0xffffffff8167bcc6 [ 689.897115] Sending NMI from CPU 2 to CPUs 12: [ 693.754358] NMI backtrace for cpu 12 skipped: idling at pc 0xffffffff8167bdcd [ 689.897115] Sending NMI from CPU 2 to CPUs 13: [ 693.755360] NMI backtrace for cpu 13 skipped: idling at pc 0xffffffff8167bdd0 [ 689.897115] Sending NMI from CPU 2 to CPUs 14: [ 693.756361] NMI backtrace for cpu 14 skipped: idling at pc 0xffffffff8167bcc6 [ 689.897115] Sending NMI from CPU 2 to CPUs 15: [ 693.757364] NMI backtrace for cpu 15 skipped: idling at pc 0xffffffff8167bcc6 [ 689.897115] Sending NMI from CPU 2 to CPUs 16: [ 693.758561] NMI backtrace for cpu 16 skipped: idling at pc 0xffffffff8167bcc6 [ 689.897115] Sending NMI from CPU 2 to CPUs 17: [ 693.759368] NMI backtrace for cpu 17 skipped: idling at pc 0xffffffff8167bcc6 [ 689.897115] Sending NMI from CPU 2 to CPUs 18: [ 693.760370] NMI backtrace for cpu 18 skipped: idling at pc 0xffffffff8167bcc6 [ 689.897115] Sending NMI from CPU 2 to CPUs 19: [ 693.761377] NMI backtrace for cpu 19 skipped: idling at pc 0xffffffff8167bcc6 [ 689.897115] Sending NMI from CPU 2 to CPUs 22: [ 693.762377] NMI backtrace for cpu 22 skipped: idling at pc 0xffffffff8167bdd0 [ 689.897115] Sending NMI from CPU 2 to CPUs 24: [ 693.763390] NMI backtrace for cpu 24 skipped: idling at pc 0xffffffff8167bdcd [ 689.897115] Sending NMI from CPU 2 to CPUs 25: [ 693.764381] NMI backtrace for cpu 25 skipped: idling at pc 0xffffffff8167bcc6 [ 689.897115] Sending NMI from CPU 2 to CPUs 26: [ 693.765390] NMI backtrace for cpu 26 skipped: idling at pc 0xffffffff8167bcc6 [ 689.897115] Sending NMI from CPU 2 to CPUs 27: [ 693.766389] NMI backtrace for cpu 27 skipped: idling at pc 0xffffffff8167bcc6 [ 689.897115] Sending NMI from CPU 2 to CPUs 28: [ 693.767390] NMI backtrace for cpu 28 skipped: idling at pc 0xffffffff8167bcc6 [ 689.897115] Sending NMI from CPU 2 to CPUs 29: [ 693.768392] NMI backtrace for cpu 29 skipped: idling at pc 0xffffffff8167bcc6 [ 689.897115] Sending NMI from CPU 2 to CPUs 30: [ 693.769396] NMI backtrace for cpu 30 skipped: idling at pc 0xffffffff8167bdc8 [ 689.897115] Sending NMI from CPU 2 to CPUs 31: [ 689.897115] NMI backtrace for cpu 31 [ 689.897115] CPU: 31 PID: 176 Comm: rcuos/24 Tainted: G W E 4.11.0-tip-default #57 [ 689.897115] Hardware name: Hewlett-Packard ProLiant DL980 G7, BIOS P66 07/07/2010 [ 689.897115] task: ffff88017dac1540 task.stack: ffffc900013dc000 [ 689.897115] RIP: 0010:native_queued_spin_lock_slowpath+0x170/0x1a0 [ 689.897115] RSP: 0018:ffffc900013dfe88 EFLAGS: 00000002 [ 689.897115] RAX: 0000000000780101 RBX: 0000000000000202 RCX: 0000000000000001 [ 689.897115] RDX: 0000000000000101 RSI: 0000000000000001 RDI: ffffffff81caac40 [ 689.897115] RBP: ffff88027741c600 R08: 0000000000000101 R09: 000000000000025d [ 689.897115] R10: 0000000000000265 R11: 0000000000000005 R12: 0000000000000001 [ 689.897115] R13: ffff88017dac1540 R14: 0000000000000000 R15: ffff88017dac1540 [ 689.897115] FS: 0000000000000000(0000) GS:ffff8802775c0000(0000) knlGS:0000000000000000 [ 689.897115] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 689.897115] CR2: 00007f30fd0ce000 CR3: 0000000001c09000 CR4: 00000000000006e0 [ 689.897115] Call Trace: [ 689.897115] ? queued_spin_lock_slowpath+0x7/0xa [ 689.897115] ? _raw_spin_lock_irqsave+0x39/0x40 [ 689.897115] ? rcu_nocb_kthread+0x24f/0x480 [ 689.897115] ? kthread+0x107/0x140 [ 689.897115] ? rcu_gp_kthread+0x8c0/0x8c0 [ 689.897115] ? kthread_park+0x60/0x60 [ 689.897115] ? ret_from_fork+0x26/0x40 [ 689.897115] Code: 89 d0 66 31 c0 39 c1 74 e7 4d 85 c9 c6 07 01 74 2d 41 c7 41 08 01 00 00 00 e9 52 ff ff ff 83 fa 01 74 17 8b 07 84 c0 74 08 f3 90 <8b> 07 84 c0 75 f8 b8 01 00 00 00 66 89 07 c3 f3 c3 f3 90 4d 8b [ 689.897115] Sending NMI from CPU 2 to CPUs 32: [ 693.771432] NMI backtrace for cpu 32 skipped: idling at pc 0xffffffff8167bcc6 [ 689.897115] Sending NMI from CPU 2 to CPUs 33: [ 693.772426] NMI backtrace for cpu 33 skipped: idling at pc 0xffffffff8167bcc6 [ 689.897115] Sending NMI from CPU 2 to CPUs 34: [ 693.773431] NMI backtrace for cpu 34 skipped: idling at pc 0xffffffff8167bcc6 [ 689.897115] Sending NMI from CPU 2 to CPUs 35: [ 693.774432] NMI backtrace for cpu 35 skipped: idling at pc 0xffffffff8167bcc6 [ 689.897115] Sending NMI from CPU 2 to CPUs 36: [ 693.775434] NMI backtrace for cpu 36 skipped: idling at pc 0xffffffff8167bcc6 [ 689.897115] Sending NMI from CPU 2 to CPUs 37: [ 693.776436] NMI backtrace for cpu 37 skipped: idling at pc 0xffffffff8167bcc6 [ 689.897115] Sending NMI from CPU 2 to CPUs 38: [ 693.777442] NMI backtrace for cpu 38 skipped: idling at pc 0xffffffff8167bcc6 [ 689.897115] Sending NMI from CPU 2 to CPUs 39: [ 693.778444] NMI backtrace for cpu 39 skipped: idling at pc 0xffffffff8167bcc6 [ 689.897115] Sending NMI from CPU 2 to CPUs 40: [ 693.779456] NMI backtrace for cpu 40 skipped: idling at pc 0xffffffff8167bcc6 [ 689.897115] Sending NMI from CPU 2 to CPUs 41: [ 693.780448] NMI backtrace for cpu 41 skipped: idling at pc 0xffffffff8167bdd0 [ 689.897115] Sending NMI from CPU 2 to CPUs 42: [ 693.781453] NMI backtrace for cpu 42 skipped: idling at pc 0xffffffff8167bdca [ 689.897115] Sending NMI from CPU 2 to CPUs 43: [ 693.782457] NMI backtrace for cpu 43 skipped: idling at pc 0xffffffff8167bcc6 [ 689.897115] Sending NMI from CPU 2 to CPUs 46: [ 693.783459] NMI backtrace for cpu 46 skipped: idling at pc 0xffffffff8167bcc6 [ 689.897115] Sending NMI from CPU 2 to CPUs 47: [ 693.784463] NMI backtrace for cpu 47 skipped: idling at pc 0xffffffff8167bcc6 [ 689.897115] Sending NMI from CPU 2 to CPUs 48: [ 693.785477] NMI backtrace for cpu 48 skipped: idling at pc 0xffffffff8167bcc6 [ 689.897115] Sending NMI from CPU 2 to CPUs 49: [ 693.786470] NMI backtrace for cpu 49 skipped: idling at pc 0xffffffff8167bcc6 [ 689.897115] Sending NMI from CPU 2 to CPUs 50: [ 693.787471] NMI backtrace for cpu 50 skipped: idling at pc 0xffffffff8167bcc6 [ 689.897115] Sending NMI from CPU 2 to CPUs 51: [ 693.788475] NMI backtrace for cpu 51 skipped: idling at pc 0xffffffff8167bdcd [ 689.897115] Sending NMI from CPU 2 to CPUs 52: [ 693.789481] NMI backtrace for cpu 52 skipped: idling at pc 0xffffffff8167bdca [ 689.897115] Sending NMI from CPU 2 to CPUs 53: [ 693.790482] NMI backtrace for cpu 53 skipped: idling at pc 0xffffffff8167bcc6 [ 689.897115] Sending NMI from CPU 2 to CPUs 54: [ 693.791585] NMI backtrace for cpu 54 skipped: idling at pc 0xffffffff8167bcc6 [ 689.897115] Sending NMI from CPU 2 to CPUs 55: [ 693.792587] NMI backtrace for cpu 55 skipped: idling at pc 0xffffffff8167bdca [ 689.897115] Sending NMI from CPU 2 to CPUs 56: [ 693.793606] NMI backtrace for cpu 56 skipped: idling at pc 0xffffffff8167bdca [ 689.897115] Sending NMI from CPU 2 to CPUs 57: [ 693.794593] NMI backtrace for cpu 57 skipped: idling at pc 0xffffffff8167bcc6 [ 689.897115] Sending NMI from CPU 2 to CPUs 58: [ 693.795595] NMI backtrace for cpu 58 skipped: idling at pc 0xffffffff8167bcc6 [ 689.897115] Sending NMI from CPU 2 to CPUs 59: [ 693.796599] NMI backtrace for cpu 59 skipped: idling at pc 0xffffffff8167bcc6 [ 689.897115] Sending NMI from CPU 2 to CPUs 60: [ 693.797605] NMI backtrace for cpu 60 skipped: idling at pc 0xffffffff8167bcc6 [ 689.897115] Sending NMI from CPU 2 to CPUs 61: [ 693.798605] NMI backtrace for cpu 61 skipped: idling at pc 0xffffffff8167bcc6 [ 689.897115] Sending NMI from CPU 2 to CPUs 62: [ 693.799611] NMI backtrace for cpu 62 skipped: idling at pc 0xffffffff8167bcc6 [ 689.897115] Sending NMI from CPU 2 to CPUs 63: [ 693.800610] NMI backtrace for cpu 63 skipped: idling at pc 0xffffffff8167bdcd [ 1447.897093] INFO: rcu_sched detected stalls on CPUs/tasks: [ 1447.901088] 5-...: (0 ticks this GP) idle=a6c/0/0 softirq=840/840 fqs=0 [ 1447.901088] 7-...: (46 GPs behind) idle=4f8/0/0 softirq=1841/1841 fqs=0 [ 1447.901088] 8-...: (58 GPs behind) idle=ab8/0/0 softirq=1994/1995 fqs=0 [ 1447.901088] 9-...: (58 GPs behind) idle=ebc/0/0 softirq=540/540 fqs=0 [ 1447.901088] 10-...: (1681 GPs behind) idle=c14/0/0 softirq=488/489 fqs=0 [ 1447.901088] 11-...: (0 ticks this GP) idle=dd8/0/0 softirq=1363/1363 fqs=0 [ 1447.901088] 12-...: (17237 GPs behind) idle=a34/0/0 softirq=437/438 fqs=0 [ 1447.901088] 13-...: (12213 GPs behind) idle=004/0/0 softirq=449/450 fqs=0 [ 1447.901088] 14-...: (58 GPs behind) idle=eec/0/0 softirq=704/705 fqs=0 [ 1447.901088] 15-...: (58 GPs behind) idle=0f8/0/0 softirq=3031/3031 fqs=0 [ 1447.901088] 16-...: (1374 GPs behind) idle=3a0/0/0 softirq=1310/1310 fqs=0 [ 1447.901088] 17-...: (1032 GPs behind) idle=ac4/0/0 softirq=412/412 fqs=0 [ 1447.901088] 18-...: (847 GPs behind) idle=d00/0/0 softirq=449/449 fqs=0 [ 1447.901088] 19-...: (1374 GPs behind) idle=8ec/0/0 softirq=381/381 fqs=0 [ 1447.901088] 20-...: (960 GPs behind) idle=2e4/0/0 softirq=407/407 fqs=0 [ 1447.901088] 21-...: (900 GPs behind) idle=6e8/0/0 softirq=463/463 fqs=0 [ 1447.901088] 22-...: (1036 GPs behind) idle=a70/0/0 softirq=399/399 fqs=0 [ 1447.901088] 23-...: (1373 GPs behind) idle=f08/0/0 softirq=377/377 fqs=0 [ 1447.901088] 24-...: (6627 GPs behind) idle=3d0/0/0 softirq=1492/1492 fqs=0 [ 1447.901088] 25-...: (11795 GPs behind) idle=2ec/0/0 softirq=438/438 fqs=0 [ 1447.901088] 26-...: (11795 GPs behind) idle=4c4/0/0 softirq=415/415 fqs=0 [ 1447.901088] 27-...: (11795 GPs behind) idle=4d0/0/0 softirq=440/440 fqs=0 [ 1447.901088] 28-...: (21604 GPs behind) idle=dec/0/0 softirq=494/495 fqs=0 [ 1447.901088] 29-...: (21367 GPs behind) idle=394/0/0 softirq=400/401 fqs=0 [ 1447.901088] 30-...: (16745 GPs behind) idle=0f0/0/0 softirq=422/423 fqs=0 [ 1447.901088] 31-...: (11795 GPs behind) idle=b94/0/0 softirq=367/367 fqs=0 [ 1447.901088] 32-...: (2042 GPs behind) idle=fa0/0/0 softirq=1263/1264 fqs=0 [ 1447.901088] 33-...: (120 GPs behind) idle=d88/0/0 softirq=1283/1284 fqs=0 [ 1447.901088] 34-...: (123 GPs behind) idle=4d8/0/0 softirq=359/359 fqs=0 [ 1447.901088] 35-...: (21608 GPs behind) idle=184/0/0 softirq=301/302 fqs=0 [ 1447.901088] 36-...: (21608 GPs behind) idle=fa0/0/0 softirq=299/300 fqs=0 [ 1447.901088] 37-...: (21623 GPs behind) idle=f0c/0/0 softirq=286/287 fqs=0 [ 1447.901088] 38-...: (214 GPs behind) idle=e54/0/0 softirq=324/324 fqs=0 [ 1447.901088] 39-...: (84 GPs behind) idle=c74/0/0 softirq=316/316 fqs=0 [ 1447.901088] 40-...: (0 ticks this GP) idle=0b0/0/0 softirq=1201/1201 fqs=0 [ 1447.901088] 42-...: (12038 GPs behind) idle=76c/0/0 softirq=338/339 fqs=0 [ 1447.901088] 43-...: (11795 GPs behind) idle=404/0/0 softirq=290/290 fqs=0 [ 1447.901088] 45-...: (462 GPs behind) idle=e90/0/0 softirq=336/336 fqs=0 [ 1447.901088] 46-...: (266 GPs behind) idle=de8/0/0 softirq=269/269 fqs=0 [ 1447.901088] 47-...: (161 GPs behind) idle=20c/0/0 softirq=309/309 fqs=0 [ 1447.901088] 48-...: (11795 GPs behind) idle=12c/0/0 softirq=1137/1138 fqs=0 [ 1447.901088] 49-...: (14006 GPs behind) idle=7a0/0/0 softirq=267/268 fqs=0 [ 1447.901088] 50-...: (13990 GPs behind) idle=f4c/0/0 softirq=232/234 fqs=0 [ 1447.901088] 52-...: (0 ticks this GP) idle=7bc/0/0 softirq=213/213 fqs=0 [ 1447.901088] 53-...: (63 GPs behind) idle=df0/0/0 softirq=238/238 fqs=0 [ 1447.901088] 54-...: (5326 GPs behind) idle=01c/0/0 softirq=300/300 fqs=0 [ 1447.901088] 55-...: (12368 GPs behind) idle=460/0/0 softirq=191/193 fqs=0 [ 1447.901088] 57-...: (17237 GPs behind) idle=ed8/0/0 softirq=319/320 fqs=0 [ 1447.901088] 58-...: (7471 GPs behind) idle=f18/0/0 softirq=190/190 fqs=0 [ 1447.901088] 59-...: (7474 GPs behind) idle=c70/0/0 softirq=279/280 fqs=0 [ 1447.901088] 60-...: (11788 GPs behind) idle=96c/0/0 softirq=157/158 fqs=0 [ 1447.901088] 61-...: (759 GPs behind) idle=73c/0/0 softirq=178/178 fqs=0 [ 1447.901088] 62-...: (11795 GPs behind) idle=b7c/0/0 softirq=117/117 fqs=0 [ 1447.901088] 63-...: (11795 GPs behind) idle=d8c/0/0 softirq=143/143 fqs=0 [ 1447.901088] (detected by 2, t=15938 jiffies, g=24070, c=24069, q=1057) [ 1447.901088] Sending NMI from CPU 2 to CPUs 5: [ 1451.999285] NMI backtrace for cpu 5 skipped: idling at pc 0xffffffff8167bcc6 [ 1447.901088] Sending NMI from CPU 2 to CPUs 7: [ 1452.000294] NMI backtrace for cpu 7 skipped: idling at pc 0xffffffff8167bcc6 [ 1447.901088] Sending NMI from CPU 2 to CPUs 8: [ 1452.001297] NMI backtrace for cpu 8 skipped: idling at pc 0xffffffff8167bdcd [ 1447.901088] Sending NMI from CPU 2 to CPUs 9: [ 1452.002296] NMI backtrace for cpu 9 skipped: idling at pc 0xffffffff8167bdca [ 1447.901088] Sending NMI from CPU 2 to CPUs 10: [ 1452.003298] NMI backtrace for cpu 10 skipped: idling at pc 0xffffffff8167bcc6 [ 1447.901088] Sending NMI from CPU 2 to CPUs 11: [ 1452.004347] NMI backtrace for cpu 11 skipped: idling at pc 0xffffffff8167bcc6 [ 1447.901088] Sending NMI from CPU 2 to CPUs 12: [ 1452.005301] NMI backtrace for cpu 12 skipped: idling at pc 0xffffffff8167bcc6 [ 1447.901088] Sending NMI from CPU 2 to CPUs 13: [ 1452.006300] NMI backtrace for cpu 13 skipped: idling at pc 0xffffffff8167bcc6 [ 1447.901088] Sending NMI from CPU 2 to CPUs 14: [ 1452.007301] NMI backtrace for cpu 14 skipped: idling at pc 0xffffffff8167bcc6 [ 1447.901088] Sending NMI from CPU 2 to CPUs 15: [ 1452.008303] NMI backtrace for cpu 15 skipped: idling at pc 0xffffffff8167bcc6 [ 1447.901088] Sending NMI from CPU 2 to CPUs 16: [ 1452.009308] NMI backtrace for cpu 16 skipped: idling at pc 0xffffffff8167bcc6 [ 1447.901088] Sending NMI from CPU 2 to CPUs 17: [ 1452.010307] NMI backtrace for cpu 17 skipped: idling at pc 0xffffffff8167bcc6 [ 1447.901088] Sending NMI from CPU 2 to CPUs 18: [ 1452.011309] NMI backtrace for cpu 18 skipped: idling at pc 0xffffffff8167bdc8 [ 1447.901088] Sending NMI from CPU 2 to CPUs 19: [ 1452.012313] NMI backtrace for cpu 19 skipped: idling at pc 0xffffffff8167bcc6 [ 1447.901088] Sending NMI from CPU 2 to CPUs 20: [ 1452.013319] NMI backtrace for cpu 20 skipped: idling at pc 0xffffffff8167bdca [ 1447.901088] Sending NMI from CPU 2 to CPUs 21: [ 1452.014316] NMI backtrace for cpu 21 skipped: idling at pc 0xffffffff8167bdca [ 1447.901088] Sending NMI from CPU 2 to CPUs 22: [ 1452.015318] NMI backtrace for cpu 22 skipped: idling at pc 0xffffffff8167bcc6 [ 1447.901088] Sending NMI from CPU 2 to CPUs 23: [ 1452.016320] NMI backtrace for cpu 23 skipped: idling at pc 0xffffffff8167bcc6 [ 1447.901088] Sending NMI from CPU 2 to CPUs 24: [ 1452.017332] NMI backtrace for cpu 24 skipped: idling at pc 0xffffffff8167bdcd [ 1447.901088] Sending NMI from CPU 2 to CPUs 25: [ 1452.018325] NMI backtrace for cpu 25 skipped: idling at pc 0xffffffff8167bcc6 [ 1447.901088] Sending NMI from CPU 2 to CPUs 26: [ 1452.019329] NMI backtrace for cpu 26 skipped: idling at pc 0xffffffff8167bcc6 [ 1447.901088] Sending NMI from CPU 2 to CPUs 27: [ 1452.020330] NMI backtrace for cpu 27 skipped: idling at pc 0xffffffff8167bcc6 [ 1447.901088] Sending NMI from CPU 2 to CPUs 28: [ 1452.021335] NMI backtrace for cpu 28 skipped: idling at pc 0xffffffff8167bcc6 [ 1447.901088] Sending NMI from CPU 2 to CPUs 29: [ 1452.022334] NMI backtrace for cpu 29 skipped: idling at pc 0xffffffff8167bcc6 [ 1447.901088] Sending NMI from CPU 2 to CPUs 30: [ 1452.023335] NMI backtrace for cpu 30 skipped: idling at pc 0xffffffff8167bcc6 [ 1447.901088] Sending NMI from CPU 2 to CPUs 31: [ 1452.024339] NMI backtrace for cpu 31 skipped: idling at pc 0xffffffff8167bcc6 [ 1447.901088] Sending NMI from CPU 2 to CPUs 32: [ 1452.025347] NMI backtrace for cpu 32 skipped: idling at pc 0xffffffff8167bcc6 [ 1447.901088] Sending NMI from CPU 2 to CPUs 33: [ 1452.026346] NMI backtrace for cpu 33 skipped: idling at pc 0xffffffff8167bdca [ 1447.901088] Sending NMI from CPU 2 to CPUs 34: [ 1452.027346] NMI backtrace for cpu 34 skipped: idling at pc 0xffffffff8167bdca [ 1447.901088] Sending NMI from CPU 2 to CPUs 35: [ 1452.028348] NMI backtrace for cpu 35 skipped: idling at pc 0xffffffff8167bcc6 [ 1447.901088] Sending NMI from CPU 2 to CPUs 36: [ 1452.029356] NMI backtrace for cpu 36 skipped: idling at pc 0xffffffff8167bcc6 [ 1447.901088] Sending NMI from CPU 2 to CPUs 37: [ 1452.030354] NMI backtrace for cpu 37 skipped: idling at pc 0xffffffff8167bcc6 [ 1447.901088] Sending NMI from CPU 2 to CPUs 38: [ 1452.031358] NMI backtrace for cpu 38 skipped: idling at pc 0xffffffff8167bcc6 [ 1447.901088] Sending NMI from CPU 2 to CPUs 39: [ 1452.032359] NMI backtrace for cpu 39 skipped: idling at pc 0xffffffff8167bdca [ 1447.901088] Sending NMI from CPU 2 to CPUs 40: [ 1452.033368] NMI backtrace for cpu 40 skipped: idling at pc 0xffffffff8167bcc6 [ 1447.901088] Sending NMI from CPU 2 to CPUs 42: [ 1452.034365] NMI backtrace for cpu 42 skipped: idling at pc 0xffffffff8167bcc6 [ 1447.901088] Sending NMI from CPU 2 to CPUs 43: [ 1452.035367] NMI backtrace for cpu 43 skipped: idling at pc 0xffffffff8167bcc6 [ 1447.901088] Sending NMI from CPU 2 to CPUs 45: [ 1452.036371] NMI backtrace for cpu 45 skipped: idling at pc 0xffffffff8167bdc8 [ 1447.901088] Sending NMI from CPU 2 to CPUs 46: [ 1452.037374] NMI backtrace for cpu 46 skipped: idling at pc 0xffffffff8167bdca [ 1447.901088] Sending NMI from CPU 2 to CPUs 47: [ 1452.038476] NMI backtrace for cpu 47 skipped: idling at pc 0xffffffff8167bcc6 [ 1447.901088] Sending NMI from CPU 2 to CPUs 48: [ 1452.039483] NMI backtrace for cpu 48 skipped: idling at pc 0xffffffff8167bcc6 [ 1447.901088] Sending NMI from CPU 2 to CPUs 49: [ 1452.040484] NMI backtrace for cpu 49 skipped: idling at pc 0xffffffff8167bcc6 [ 1447.901088] Sending NMI from CPU 2 to CPUs 50: [ 1452.041486] NMI backtrace for cpu 50 skipped: idling at pc 0xffffffff8167bcc6 [ 1447.901088] Sending NMI from CPU 2 to CPUs 52: [ 1452.042488] NMI backtrace for cpu 52 skipped: idling at pc 0xffffffff8167bcc6 [ 1447.901088] Sending NMI from CPU 2 to CPUs 53: [ 1452.043489] NMI backtrace for cpu 53 skipped: idling at pc 0xffffffff8167bcc6 [ 1447.901088] Sending NMI from CPU 2 to CPUs 54: [ 1452.044493] NMI backtrace for cpu 54 skipped: idling at pc 0xffffffff8167bcc6 [ 1447.901088] Sending NMI from CPU 2 to CPUs 55: [ 1452.045500] NMI backtrace for cpu 55 skipped: idling at pc 0xffffffff8167bcc6 [ 1447.901088] Sending NMI from CPU 2 to CPUs 57: [ 1452.046499] NMI backtrace for cpu 57 skipped: idling at pc 0xffffffff8167bcc6 [ 1447.901088] Sending NMI from CPU 2 to CPUs 58: [ 1452.047502] NMI backtrace for cpu 58 skipped: idling at pc 0xffffffff8167bdca [ 1447.901088] Sending NMI from CPU 2 to CPUs 59: [ 1452.048504] NMI backtrace for cpu 59 skipped: idling at pc 0xffffffff8167bcc6 [ 1447.901088] Sending NMI from CPU 2 to CPUs 60: [ 1452.049511] NMI backtrace for cpu 60 skipped: idling at pc 0xffffffff8167bcc6 [ 1447.901088] Sending NMI from CPU 2 to CPUs 61: [ 1452.050509] NMI backtrace for cpu 61 skipped: idling at pc 0xffffffff8167bdcd [ 1447.901088] Sending NMI from CPU 2 to CPUs 62: [ 1452.051510] NMI backtrace for cpu 62 skipped: idling at pc 0xffffffff8167bcc6 [ 1447.901088] Sending NMI from CPU 2 to CPUs 63: [ 1452.052514] NMI backtrace for cpu 63 skipped: idling at pc 0xffffffff8167bcc6 [ 1447.901088] rcu_sched kthread starved for 16040 jiffies! g24070 c24069 f0x0 RCU_GP_WAIT_FQS(3) ->state=0x1 [ 1447.901088] rcu_sched S 0 9 2 0x00000000 [ 1447.901088] Call Trace: [ 1447.901088] ? __schedule+0x28f/0x8b0 [ 1447.901088] ? schedule+0x39/0x90 [ 1447.901088] ? schedule_timeout+0x180/0x2f0 [ 1447.901088] ? call_timer_fn+0x150/0x150 [ 1447.901088] ? rcu_gp_kthread+0x3b4/0x8c0 [ 1447.901088] ? kthread+0x107/0x140 [ 1447.901088] ? force_qs_rnp+0x1a0/0x1a0 [ 1447.901088] ? kthread_park+0x60/0x60 [ 1447.901088] ? ret_from_fork+0x26/0x40
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