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Message-ID: <20180412223904.GJ12256@bigcity.dyn.berto.se>
Date: Fri, 13 Apr 2018 00:39:04 +0200
From: Niklas Söderlund
<niklas.soderlund@...natech.se>
To: Vincent Guittot <vincent.guittot@...aro.org>
Cc: i@...aro.org, Heiner Kallweit <hkallweit1@...il.com>,
Peter Zijlstra <peterz@...radead.org>,
"Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>,
Ingo Molnar <mingo@...hat.com>,
linux-kernel <linux-kernel@...r.kernel.org>,
linux-renesas-soc@...r.kernel.org
Subject: Re: Potential problem with 31e77c93e432dec7 ("sched/fair: Update
blocked load when newly idle")
Hi Vincent,
Thanks for helping trying to figure this out.
On 2018-04-12 15:30:31 +0200, Vincent Guittot wrote:
[snip]
>
> I'd like to narrow the problem a bit more with the 2 patchies aboves. Can you try
> them separatly on top of c18bb396d3d261eb ("Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net"))
> and check if one of them fixes the problem ?i
I tried your suggested changes based on top of c18bb396d3d261eb.
>
> (They should apply on linux-next as well)
>
> First patch always kick ilb instead of doing ilb on local cpu before entering idle
>
> ---
> kernel/sched/fair.c | 3 +--
> 1 file changed, 1 insertion(+), 2 deletions(-)
>
> diff --git a/kernel/sched/fair.c b/kernel/sched/fair.c
> index 0951d1c..b21925b 100644
> --- a/kernel/sched/fair.c
> +++ b/kernel/sched/fair.c
> @@ -9739,8 +9739,7 @@ static void nohz_newidle_balance(struct rq *this_rq)
> * candidate for ilb instead of waking up another idle CPU.
> * Kick an normal ilb if we failed to do the update.
> */
> - if (!_nohz_idle_balance(this_rq, NOHZ_STATS_KICK, CPU_NEWLY_IDLE))
> - kick_ilb(NOHZ_STATS_KICK);
> + kick_ilb(NOHZ_STATS_KICK);
> raw_spin_lock(&this_rq->lock);
> }
This change don't seem to effect the issue. I can still get the single
ssh session and the system to lockup by hitting the return key. And
opening a second ssh session immediately unblocks both the first ssh
session and the serial console. And I can still trigger the console
warning by just letting the system be once it locks-up. I do have
just as before reset the system a few times to trigger the issue.
[ 245.351693] INFO: rcu_sched detected stalls on CPUs/tasks:
[ 245.357199] 0-...!: (1 GPs behind) idle=93c/0/0 softirq=2224/2225 fqs=0
[ 245.363988] (detected by 1, t=3025 jiffies, g=337, c=336, q=10)
[ 245.370003] Sending NMI from CPU 1 to CPUs 0:
[ 245.374368] NMI backtrace for cpu 0
[ 245.374377] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 4.16.0-10930-ged741fb4567c816f #42
[ 245.374379] Hardware name: Generic R8A7791 (Flattened Device Tree)
[ 245.374393] PC is at arch_cpu_idle+0x24/0x40
[ 245.374397] LR is at arch_cpu_idle+0x34/0x40
[ 245.374400] pc : [<c0108554>] lr : [<c0108564>] psr: 60050013
[ 245.374403] sp : c0b01f40 ip : c0b01f50 fp : c0b01f4c
[ 245.374405] r10: c0a56a38 r9 : e7fffbc0 r8 : c0b04c00
[ 245.374407] r7 : c0b04c78 r6 : c0b04c2c r5 : ffffe000 r4 : 00000001
[ 245.374410] r3 : c0119100 r2 : e77813a8 r1 : 0002d93c r0 : 00000000
[ 245.374414] Flags: nZCv IRQs on FIQs on Mode SVC_32 ISA ARM Segment none
[ 245.374417] Control: 10c5387d Table: 6662006a DAC: 00000051
[ 245.374421] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 4.16.0-10930-ged741fb4567c816f #42
[ 245.374423] Hardware name: Generic R8A7791 (Flattened Device Tree)
[ 245.374425] Backtrace:
[ 245.374435] [<c010c170>] (dump_backtrace) from [<c010c3f0>] (show_stack+0x18/0x1c)
[ 245.374440] r7:c0b47278 r6:60050193 r5:00000000 r4:c0b73d80
[ 245.374450] [<c010c3d8>] (show_stack) from [<c074b824>] (dump_stack+0x84/0xa4)
[ 245.374456] [<c074b7a0>] (dump_stack) from [<c01087e8>] (show_regs+0x14/0x18)
[ 245.374460] r7:c0b47278 r6:c0b01ef0 r5:00000000 r4:c0bc62c8
[ 245.374468] [<c01087d4>] (show_regs) from [<c0751938>] (nmi_cpu_backtrace+0xfc/0x118)
[ 245.374475] [<c075183c>] (nmi_cpu_backtrace) from [<c010ef34>] (handle_IPI+0x22c/0x294)
[ 245.374479] r7:c0b47278 r6:c0b01ef0 r5:00000007 r4:c0a775fc
[ 245.374488] [<c010ed08>] (handle_IPI) from [<c037cd68>] (gic_handle_irq+0x8c/0x98)
[ 245.374492] r10:c0a56a38 r9:c0b00000 r8:f0803000 r7:c0b47278 r6:c0b01ef0 r5:c0b05244
[ 245.374495] r4:f0802000 r3:00000407
[ 245.374501] [<c037ccdc>] (gic_handle_irq) from [<c0101a0c>] (__irq_svc+0x6c/0x90)
[ 245.374504] Exception stack(0xc0b01ef0 to 0xc0b01f38)
[ 245.374507] 1ee0: 00000000 0002d93c e77813a8 c0119100
[ 245.374512] 1f00: 00000001 ffffe000 c0b04c2c c0b04c78 c0b04c00 e7fffbc0 c0a56a38 c0b01f4c
[ 245.374516] 1f20: c0b01f50 c0b01f40 c0108564 c0108554 60050013 ffffffff
[ 245.374521] r9:c0b00000 r8:c0b04c00 r7:c0b01f24 r6:ffffffff r5:60050013 r4:c0108554
[ 245.374528] [<c0108530>] (arch_cpu_idle) from [<c076512c>] (default_idle_call+0x30/0x34)
[ 245.374535] [<c07650fc>] (default_idle_call) from [<c014b834>] (do_idle+0xd8/0x128)
[ 245.374540] [<c014b75c>] (do_idle) from [<c014baf0>] (cpu_startup_entry+0x20/0x24)
[ 245.374543] r7:c0b04c08 r6:ffffffff r5:c0b80380 r4:000000c2
[ 245.374549] [<c014bad0>] (cpu_startup_entry) from [<c075fb14>] (rest_init+0x9c/0xbc)
[ 245.374555] [<c075fa78>] (rest_init) from [<c0a00dc4>] (start_kernel+0x368/0x3ec)
[ 245.374558] r5:c0b80380 r4:c0b803c0
[ 245.374563] [<c0a00a5c>] (start_kernel) from [<00000000>] ( (null))
[ 245.375369] rcu_sched kthread starved for 3028 jiffies! g337 c336 f0x0 RCU_GP_WAIT_FQS(3) ->state=0x402 ->cpu=1
[ 245.641242] RCU grace-period kthread stack dump:
[ 245.645859] rcu_sched I 0 9 2 0x00000000
[ 245.651350] Backtrace:
[ 245.653804] [<c07603f0>] (__schedule) from [<c0760b44>] (schedule+0x94/0xb8)
[ 245.660857] r10:e77903c0 r9:e77903c0 r8:ffffffff r7:e709bed4 r6:ffffded7 r5:00000000
[ 245.668689] r4:ffffe000
[ 245.671227] [<c0760ab0>] (schedule) from [<c0764500>] (schedule_timeout+0x380/0x3dc)
[ 245.678973] r5:00000000 r4:00000000
[ 245.682557] [<c0764180>] (schedule_timeout) from [<c017b620>] (rcu_gp_kthread+0x668/0xe2c)
[ 245.690826] r10:c0b79018 r9:00000151 r8:00000150 r7:00000001 r6:00000000 r5:c0b10ad0
[ 245.698658] r4:c0b10980
[ 245.701197] [<c017afb8>] (rcu_gp_kthread) from [<c013ddd8>] (kthread+0x148/0x160)
[ 245.708682] r7:c0b10980
[ 245.711218] [<c013dc90>] (kthread) from [<c01010e8>] (ret_from_fork+0x14/0x2c)
[ 245.718443] Exception stack(0xe709bfb0 to 0xe709bff8)
[ 245.723495] bfa0: 00000000 00000000 00000000 00000000
[ 245.731677] bfc0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
[ 245.739858] bfe0: 00000000 00000000 00000000 00000000 00000013 00000000
[ 245.746476] r10:00000000 r9:00000000 r8:00000000 r7:00000000 r6:00000000 r5:c013dc90
[ 245.754307] r4:e7026f40
[ 335.351162] INFO: rcu_sched detected stalls on CPUs/tasks:
[ 335.356682] 0-...!: (0 ticks this GP) idle=b0a/1/1073741824 softirq=2226/2226 fqs=0
[ 335.364521] (detected by 1, t=6027 jiffies, g=340, c=339, q=77)
[ 335.370545] Sending NMI from CPU 1 to CPUs 0:
[ 345.374803] NMI backtrace for cpu 1
[ 345.378295] CPU: 1 PID: 1926 Comm: bash Not tainted 4.16.0-10930-ged741fb4567c816f #42
[ 345.386215] Hardware name: Generic R8A7791 (Flattened Device Tree)
[ 345.392395] Backtrace:
[ 345.394855] [<c010c170>] (dump_backtrace) from [<c010c3f0>] (show_stack+0x18/0x1c)
[ 345.402430] r7:00000000 r6:600f0193 r5:00000000 r4:c0b73d80
[ 345.408097] [<c010c3d8>] (show_stack) from [<c074b824>] (dump_stack+0x84/0xa4)
[ 345.415329] [<c074b7a0>] (dump_stack) from [<c0751940>] (nmi_cpu_backtrace+0x104/0x118)
[ 345.423337] r7:00000000 r6:00000000 r5:00000001 r4:c0bc62c8
[ 345.429001] [<c075183c>] (nmi_cpu_backtrace) from [<c07519e0>] (nmi_trigger_cpumask_backtrace+0x8c/0x10c)
[ 345.438572] r7:00000000 r6:c010e4d4 r5:00000001 r4:c0b08158
[ 345.444237] [<c0751954>] (nmi_trigger_cpumask_backtrace) from [<c010f0ec>] (arch_trigger_cpumask_backtrace+0x14/0x1c)
[ 345.454850] r7:c0b10980 r6:c0b04cd0 r5:00000001 r4:c0b10980
[ 345.460519] [<c010f0d8>] (arch_trigger_cpumask_backtrace) from [<c017f9ac>] (rcu_dump_cpu_stacks+0xb0/0xd0)
[ 345.470268] [<c017f8fc>] (rcu_dump_cpu_stacks) from [<c017e73c>] (rcu_check_callbacks+0x584/0x71c)
[ 345.479232] r10:0000004d r9:c0b03d00 r8:ffffe000 r7:00000001 r6:c0b10940 r5:e7795080
[ 345.487065] r4:c0b10980 r3:f181863e
[ 345.490648] [<c017e1b8>] (rcu_check_callbacks) from [<c0184a60>] (update_process_times+0x38/0x64)
[ 345.499524] r10:e7fa9ea0 r9:e67e8000 r8:e7795e00 r7:0000004e r6:00000000 r5:e72d0640
[ 345.507356] r4:ffffe000
[ 345.509903] [<c0184a28>] (update_process_times) from [<c0195bf0>] (tick_nohz_handler+0xc8/0x114)
[ 345.518693] r7:0000004e r6:146afc64 r5:e67e9d70 r4:e77917a0
[ 345.524362] [<c0195b28>] (tick_nohz_handler) from [<c05c16ac>] (arch_timer_handler_virt+0x30/0x40)
[ 345.533325] r8:c0b05244 r7:00000013 r6:e7017a40 r5:00000000 r4:e7015c00
[ 345.540033] [<c05c167c>] (arch_timer_handler_virt) from [<c016ecd4>] (handle_percpu_devid_irq+0xf0/0x224)
[ 345.549607] [<c016ebe4>] (handle_percpu_devid_irq) from [<c016a208>] (generic_handle_irq+0x20/0x30)
[ 345.558657] r10:e7fa9ea0 r9:e67e8000 r8:e7008800 r7:00000013 r6:c0a775fc r5:00000000
[ 345.566489] r4:00000000 r3:c016ebe4
[ 345.570067] [<c016a1e8>] (generic_handle_irq) from [<c016a2c0>] (__handle_domain_irq+0xa8/0xbc)
[ 345.578777] [<c016a218>] (__handle_domain_irq) from [<c037cd3c>] (gic_handle_irq+0x60/0x98)
[ 345.587132] r9:e67e8000 r8:f0803000 r7:c0b47278 r6:e67e9d70 r5:c0b05244 r4:f0802000
[ 345.594883] [<c037ccdc>] (gic_handle_irq) from [<c0101a0c>] (__irq_svc+0x6c/0x90)
[ 345.602368] Exception stack(0xe67e9d70 to 0xe67e9db8)
[ 345.607421] 9d60: 00000000 e6c433e8 00182b08 00000000
[ 345.615603] 9d80: e6c429b4 00000087 e67e9e34 e6c434c4 00000000 00000087 e7fa9ea0 e67e9e14
[ 345.623784] 9da0: 00000000 e67e9dc0 c01e0f34 c01e0f88 600f0113 ffffffff
[ 345.630401] r9:e67e8000 r8:00000000 r7:e67e9da4 r6:ffffffff r5:600f0113 r4:c01e0f88
[ 345.638156] [<c01e0d84>] (filemap_map_pages) from [<c02141f0>] (handle_mm_fault+0x5c8/0x93c)
[ 345.646599] r10:e5dc5380 r9:80000007 r8:00000080 r7:b6e02000 r6:c0b04c08 r5:0000008f
[ 345.654431] r4:00000000
[ 345.656968] [<c0213c28>] (handle_mm_fault) from [<c011404c>] (do_page_fault+0x17c/0x324)
[ 345.665063] r10:e5dc5380 r9:80000007 r8:e72d0640 r7:00000054 r6:e5d030c0 r5:b6e023dc
[ 345.672895] r4:e67e9fb0
[ 345.675431] [<c0113ed0>] (do_page_fault) from [<c0114470>] (do_PrefetchAbort+0x4c/0xc8)
[ 345.683439] r10:00000010 r9:00179207 r8:c0b0a434 r7:e67e9fb0 r6:b6e023dc r5:c0b04c08
[ 345.691271] r4:00000007
[ 345.693807] [<c0114424>] (do_PrefetchAbort) from [<c010204c>] (ret_from_exception+0x0/0x14)
[ 345.702160] Exception stack(0xe67e9fb0 to 0xe67e9ff8)
[ 345.707213] 9fa0: 00000000 000e9600 00000001 bec86544
[ 345.715395] 9fc0: 00000001 bec86544 00000000 00000000 bec8654c 00179207 00000010 000e9600
[ 345.723576] 9fe0: 000c8140 bec86538 0002847c b6e023dc 200f0010 ffffffff
[ 345.730192] r8:10c5387d r7:10c5387d r6:ffffffff r5:200f0010 r4:b6e023dc
[ 345.737364] nfs: server 10.0.1.1 not responding, still trying
[ 345.743294] nfs: server 10.0.1.1 not responding, still trying
[ 345.744534] nfs: server 10.0.1.1 not responding, still trying
[ 345.749262] nfs: server 10.0.1.1 OK
[ 345.755391] nfs: server 10.0.1.1 OK
[ 345.758641] nfs: server 10.0.1.1 OK
>
> --
> 2.7.4
>
>
> The 2nd patch does the opposite and never kick ilb. I have always made the
> assumtpion that the problem was coming from _nohz_idle_balance() and I just
> wanted to check that's the case
>
> ---
> kernel/sched/fair.c | 3 +--
> 1 file changed, 1 insertion(+), 2 deletions(-)
>
> diff --git a/kernel/sched/fair.c b/kernel/sched/fair.c
> index 0951d1c..1766594 100644
> --- a/kernel/sched/fair.c
> +++ b/kernel/sched/fair.c
> @@ -9739,8 +9739,7 @@ static void nohz_newidle_balance(struct rq *this_rq)
> * candidate for ilb instead of waking up another idle CPU.
> * Kick an normal ilb if we failed to do the update.
> */
> - if (!_nohz_idle_balance(this_rq, NOHZ_STATS_KICK, CPU_NEWLY_IDLE))
> - kick_ilb(NOHZ_STATS_KICK);
> + _nohz_idle_balance(this_rq, NOHZ_STATS_KICK, CPU_NEWLY_IDLE);
> raw_spin_lock(&this_rq->lock);
> }
With this change it seem more difficult to trigger the issue, I usually
can trigger it within 2-3 rests of the system but with this applied I
had to reset it over 5 times to trigger it. But I can still reproduce
the lockup reliably multiple times. I would not trust my feeling that
it's harder to reproduce with this change as the method to trigger it is
kind of spotty and most likely due to circumstantial circumstances :-)
I can still unlock the system by starting a second ssh session and
trigger the output on the serial console.
[ 193.741481] INFO: rcu_sched detected stalls on CPUs/tasks:
[ 193.746991] 1-...!: (0 ticks this GP) idle=83c/0/0 softirq=2445/2445 fqs=0
[ 193.754041] (detected by 0, t=4096 jiffies, g=611, c=610, q=31)
[ 193.760054] NMI backtrace for cpu 0
[ 193.763546] CPU: 0 PID: 2193 Comm: bash Not tainted 4.16.0-10929-gc18bb396d3d261eb-dirty #43
[ 193.771984] Hardware name: Generic R8A7791 (Flattened Device Tree)
[ 193.778163] Backtrace:
[ 193.780625] [<c010c170>] (dump_backtrace) from [<c010c3f0>] (show_stack+0x18/0x1c)
[ 193.788198] r7:00000000 r6:60010193 r5:00000000 r4:c0b73d80
[ 193.793865] [<c010c3d8>] (show_stack) from [<c074b864>] (dump_stack+0x84/0xa4)
[ 193.801093] [<c074b7e0>] (dump_stack) from [<c0751980>] (nmi_cpu_backtrace+0x104/0x118)
[ 193.809098] r7:00000000 r6:00000000 r5:00000000 r4:c0bc62c8
[ 193.814761] [<c075187c>] (nmi_cpu_backtrace) from [<c0751a20>] (nmi_trigger_cpumask_backtrace+0x8c/0x10c)
[ 193.824329] r7:00000000 r6:c010e4d4 r5:00000000 r4:c0b08158
[ 193.829992] [<c0751994>] (nmi_trigger_cpumask_backtrace) from [<c010f0ec>] (arch_trigger_cpumask_backtrace+0x14/0x1c)
[ 193.840603] r7:c0b10980 r6:c0b04cd0 r5:00000000 r4:c0b10980
[ 193.846268] [<c010f0d8>] (arch_trigger_cpumask_backtrace) from [<c017f9ec>] (rcu_dump_cpu_stacks+0xb0/0xd0)
[ 193.856015] [<c017f93c>] (rcu_dump_cpu_stacks) from [<c017e77c>] (rcu_check_callbacks+0x584/0x71c)
[ 193.864977] r10:0000001f r9:c0b03d00 r8:ffffe000 r7:00000001 r6:c0b10940 r5:e7786080
[ 193.872810] r4:c0b10980 r3:f181863e
[ 193.876392] [<c017e1f8>] (rcu_check_callbacks) from [<c0184aa0>] (update_process_times+0x38/0x64)
[ 193.885268] r10:00000000 r9:00180b98 r8:e7786e00 r7:0000002d r6:00000001 r5:e5d86180
[ 193.893100] r4:ffffe000
[ 193.895642] [<c0184a68>] (update_process_times) from [<c0195c30>] (tick_nohz_handler+0xc8/0x114)
[ 193.904431] r7:0000002d r6:1bcdda00 r5:e66c7fb0 r4:e77827a0
[ 193.910099] [<c0195b68>] (tick_nohz_handler) from [<c05c16ec>] (arch_timer_handler_virt+0x30/0x40)
[ 193.919062] r8:c0b05244 r7:00000013 r6:e7017a40 r5:00000000 r4:e7015c00
[ 193.925769] [<c05c16bc>] (arch_timer_handler_virt) from [<c016ed14>] (handle_percpu_devid_irq+0xf0/0x224)
[ 193.935343] [<c016ec24>] (handle_percpu_devid_irq) from [<c016a248>] (generic_handle_irq+0x20/0x30)
[ 193.944394] r10:00000000 r9:00180b98 r8:e7008800 r7:00000013 r6:c0a775fc r5:00000000
[ 193.952225] r4:00000000 r3:c016ec24
[ 193.955803] [<c016a228>] (generic_handle_irq) from [<c016a300>] (__handle_domain_irq+0xa8/0xbc)
[ 193.964513] [<c016a258>] (__handle_domain_irq) from [<c037cd7c>] (gic_handle_irq+0x60/0x98)
[ 193.972869] r9:00180b98 r8:f0803000 r7:c0b47278 r6:e66c7fb0 r5:c0b05244 r4:f0802000
[ 193.980619] [<c037cd1c>] (gic_handle_irq) from [<c0101dd4>] (__irq_usr+0x54/0x80)
[ 193.988105] Exception stack(0xe66c7fb0 to 0xe66c7ff8)
[ 193.993157] 7fa0: 00000000 00000000 b6e8b79c 00000000
[ 194.001339] 7fc0: 00178378 000134e0 b6e8b794 b6e8b000 b6e8b794 00180b98 00000000 b6e8b7c4
[ 194.009520] 7fe0: be955190 be955170 00000000 b6db5c58 20010010 ffffffff
[ 194.016137] r9:00180b98 r8:10c5387d r7:10c5387d r6:ffffffff r5:20010010 r4:b6db5c58
[ 194.023888] Sending NMI from CPU 0 to CPUs 1:
[ 204.028147] NMI backtrace for cpu 1
[ 204.028152] CPU: 1 PID: 0 Comm: swapper/1 Not tainted 4.16.0-10929-gc18bb396d3d261eb-dirty #43
[ 204.028155] Hardware name: Generic R8A7791 (Flattened Device Tree)
[ 204.028164] PC is at _raw_spin_unlock_irqrestore+0x28/0x2c
[ 204.028169] LR is at rcu_report_qs_rnp+0x4c/0x20c
[ 204.028172] pc : [<c07653d8>] lr : [<c01796d4>] psr: 200e0113
[ 204.028175] sp : e70a3db0 ip : e70a3dc0 fp : e70a3dbc
[ 204.028177] r10: 00000264 r9 : c0b787eb r8 : 00000001
[ 204.028179] r7 : 00000002 r6 : c0b10980 r5 : c0b10980 r4 : c0b10980
[ 204.028182] r3 : 000022a3 r2 : 00000264 r1 : 600e0113 r0 : c0b10980
[ 204.028187] Flags: nzCv IRQs on FIQs on Mode SVC_32 ISA ARM Segment none
[ 204.028189] Control: 10c5387d Table: 66b9806a DAC: 00000051
[ 204.028193] CPU: 1 PID: 0 Comm: swapper/1 Not tainted 4.16.0-10929-gc18bb396d3d261eb-dirty #43
[ 204.028195] Hardware name: Generic R8A7791 (Flattened Device Tree)
[ 204.028197] Backtrace:
[ 204.028204] [<c010c170>] (dump_backtrace) from [<c010c3f0>] (show_stack+0x18/0x1c)
[ 204.028209] r7:c0b47278 r6:600e0193 r5:00000000 r4:c0b73d80
[ 204.028215] [<c010c3d8>] (show_stack) from [<c074b864>] (dump_stack+0x84/0xa4)
[ 204.028228] [<c074b7e0>] (dump_stack) from [<c01087e8>] (show_regs+0x14/0x18)
[ 204.028231] r7:c0b47278 r6:e70a3d60 r5:00000001 r4:c0bc62c8
[ 204.028238] [<c01087d4>] (show_regs) from [<c0751978>] (nmi_cpu_backtrace+0xfc/0x118)
[ 204.028244] [<c075187c>] (nmi_cpu_backtrace) from [<c010ef34>] (handle_IPI+0x22c/0x294)
[ 204.028247] r7:c0b47278 r6:e70a3d60 r5:00000007 r4:c0a775fc
[ 204.028254] [<c010ed08>] (handle_IPI) from [<c037cda8>] (gic_handle_irq+0x8c/0x98)
[ 204.028259] r10:00000264 r9:e70a2000 r8:f0803000 r7:c0b47278 r6:e70a3d60 r5:c0b05244
[ 204.028261] r4:f0802000 r3:00000007
[ 204.028267] [<c037cd1c>] (gic_handle_irq) from [<c0101a0c>] (__irq_svc+0x6c/0x90)
[ 204.028270] Exception stack(0xe70a3d60 to 0xe70a3da8)
[ 204.028275] 3d60: c0b10980 600e0113 00000264 000022a3 c0b10980 c0b10980 c0b10980 00000002
[ 204.028280] 3d80: 00000001 c0b787eb 00000264 e70a3dbc e70a3dc0 e70a3db0 c01796d4 c07653d8
[ 204.028283] 3da0: 200e0113 ffffffff
[ 204.028287] r9:e70a2000 r8:00000001 r7:e70a3d94 r6:ffffffff r5:200e0113 r4:c07653d8
[ 204.028295] [<c07653b0>] (_raw_spin_unlock_irqrestore) from [<c01796d4>] (rcu_report_qs_rnp+0x4c/0x20c)
[ 204.028301] [<c0179688>] (rcu_report_qs_rnp) from [<c017c188>] (rcu_process_callbacks+0x364/0x8cc)
[ 204.028305] r10:c0b03080 r9:00000000 r8:00000002 r7:600e0113 r6:c0b10980 r5:c0b10980
[ 204.028306] r4:e7795080
[ 204.028312] [<c017be24>] (rcu_process_callbacks) from [<c010236c>] (__do_softirq+0x23c/0x338)
[ 204.028316] r10:c0b03080 r9:00000100 r8:c0b80ec0 r7:00000002 r6:00000009 r5:c0b030a4
[ 204.028318] r4:ffffe000
[ 204.028325] [<c0102130>] (__do_softirq) from [<c0125b90>] (irq_exit+0x6c/0xd4)
[ 204.028329] r10:00000000 r9:e70a2000 r8:e7008800 r7:00000013 r6:c0a775fc r5:00000000
[ 204.028331] r4:00000000
[ 204.028336] [<c0125b24>] (irq_exit) from [<c016a2e0>] (__handle_domain_irq+0x88/0xbc)
[ 204.028338] r5:00000000 r4:00000000
[ 204.028344] [<c016a258>] (__handle_domain_irq) from [<c037cd7c>] (gic_handle_irq+0x60/0x98)
[ 204.028348] r9:e70a2000 r8:f0803000 r7:c0b47278 r6:e70a3f40 r5:c0b05244 r4:f0802000
[ 204.028354] [<c037cd1c>] (gic_handle_irq) from [<c0101a0c>] (__irq_svc+0x6c/0x90)
[ 204.028356] Exception stack(0xe70a3f40 to 0xe70a3f88)
[ 204.028361] 3f40: 00000000 00013844 e77903a8 c0119100 00000002 ffffe000 c0b04c2c c0b04c78
[ 204.028367] 3f60: 4000406a 413fc0f2 00000000 e70a3f9c e70a3fa0 e70a3f90 c0108564 c0108554
[ 204.028370] 3f80: 600e0013 ffffffff
[ 204.028374] r9:e70a2000 r8:4000406a r7:e70a3f74 r6:ffffffff r5:600e0013 r4:c0108554
[ 204.028381] [<c0108530>] (arch_cpu_idle) from [<c076516c>] (default_idle_call+0x30/0x34)
[ 204.028388] [<c076513c>] (default_idle_call) from [<c014b834>] (do_idle+0xd8/0x128)
[ 204.028392] [<c014b75c>] (do_idle) from [<c014baf0>] (cpu_startup_entry+0x20/0x24)
[ 204.028396] r7:c0b80750 r6:10c0387d r5:00000051 r4:00000085
[ 204.028401] [<c014bad0>] (cpu_startup_entry) from [<c010eacc>] (secondary_start_kernel+0x10c/0x12c)
[ 204.028406] [<c010e9c0>] (secondary_start_kernel) from [<4010250c>] (0x4010250c)
[ 204.028408] r5:00000051 r4:6709406a
>
> --
> 2.7.4
>
>
> Thanks,
> Vincent
>
> > >
> > >
> > > Regards,
> > > Vincent
> > > >
> > > > 1. c18bb396d3d261eb ("Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net"))
> > > > 2. 31e77c93e432dec7 ("sched/fair: Update blocked load when newly idle")
> > > >
> > > > --
> > > > Regards,
> > > > Niklas Söderlund
> >
> > --
> > Regards,
> > Niklas Söderlund
--
Regards,
Niklas Söderlund
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