Re: [tip:x86/asm] x86: Speed up ___preempt_schedule*() by using THUNK helpers

From: Sasha Levin
Date: Fri Oct 03 2014 - 00:51:40 EST

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On 09/24/2014 11:02 AM, tip-bot for Oleg Nesterov wrote:
> Commit-ID: 0ad6e3c5199be12c9745da8f8b9e3c9f8066c235
> Gitweb: http://git.kernel.org/tip/0ad6e3c5199be12c9745da8f8b9e3c9f8066c235
> Author: Oleg Nesterov <oleg@xxxxxxxxxx>
> AuthorDate: Sun, 21 Sep 2014 20:41:53 +0200
> Committer: Ingo Molnar <mingo@xxxxxxxxxx>
> CommitDate: Wed, 24 Sep 2014 15:15:38 +0200
>
> x86: Speed up ___preempt_schedule*() by using THUNK helpers
>
> ___preempt_schedule() does SAVE_ALL/RESTORE_ALL but this is
> suboptimal, we do not need to save/restore the callee-saved
> register. And we already have arch/x86/lib/thunk_*.S which
> implements the similar asm wrappers, so it makes sense to
> redefine ___preempt_schedule() as "THUNK ..." and remove
> preempt.S altogether.
>
> Signed-off-by: Oleg Nesterov <oleg@xxxxxxxxxx>
> Reviewed-by: Andy Lutomirski <luto@xxxxxxxxxxxxxx>
> Cc: Denys Vlasenko <dvlasenk@xxxxxxxxxx>
> Cc: Peter Zijlstra <peterz@xxxxxxxxxxxxx>
> Cc: Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx>
> Link: http://lkml.kernel.org/r/20140921184153.GA23727@xxxxxxxxxx
> Signed-off-by: Ingo Molnar <mingo@xxxxxxxxxx>
> ---

Hi Oleg,

I *think* that this patch is causing the following trace (arch/x86/lib/thunk_64.S:44
is new code introduced by this patch):

[ 921.908530] kernel BUG at kernel/sched/core.c:2702!
[ 921.909159] invalid opcode: 0000 [#1] PREEMPT SMP DEBUG_PAGEALLOC
[ 921.910084] Dumping ftrace buffer:
[ 921.910626] (ftrace buffer empty)
[ 921.911178] Modules linked in:
[ 921.915690] CPU: 18 PID: 9489 Comm: trinity-c195 Not tainted 3.17.0-rc7-next-20141002-sasha-00031-gbdb4244 #1273
[ 921.917016] task: ffff8802bd748000 ti: ffff8802bda3c000 task.ti: ffff8802bda3c000
[ 921.917752] RIP: __schedule (kernel/sched/core.c:2702 kernel/sched/core.c:2808)
[ 921.917752] RSP: 0018:ffff8802bda3c360 EFLAGS: 00010297
[ 921.917752] RAX: ffff8802bda3c000 RBX: ffff8808501e2a00 RCX: 0000000000000001
[ 921.917752] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000286
[ 921.917752] RBP: ffff8802bda3c3c0 R08: 000000000001aa50 R09: 0000000000000000
[ 921.917752] R10: 0000000000000000 R11: 0000000000000001 R12: 0000000000000012
[ 921.917752] R13: ffff8808501e2a00 R14: 0000000000000002 R15: ffff8802bda3c428
[ 921.917752] FS: 00007f5475cc2700(0000) GS:ffff880850000000(0000) knlGS:0000000000000000
[ 921.917752] CS: 0010 DS: 0000 ES: 0000 CR0: 000000008005003b
[ 921.917752] CR2: 00007f5475abe60c CR3: 00000002bebab000 CR4: 00000000000006a0
[ 921.917752] DR0: 00000000006f0000 DR1: 0000000000000000 DR2: 0000000000000000
[ 921.917752] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
[ 921.917752] Stack:
[ 921.917752] 000000000001aa50 ffff8802bd748000 ffff8802bda3ffd8 00000000001e2a00
[ 921.917752] 00000000001e2a00 ffff8802bd748000 ffff8802bda3c3a0 00000000001e2a00
[ 921.917752] ffff8802bd748000 000000000001a9ea 0000000000000002 ffff8802bda3c428
[ 921.917752] Call Trace:
[ 921.917752] schedule_user (kernel/sched/core.c:2894 include/linux/jump_label.h:114 include/linux/context_tracking_state.h:27 include/linux/context_tracking.h:20 kernel/sched/core.c:2909)
[ 921.917752] int_careful (arch/x86/kernel/entry_64.S:560)
[ 921.917752] ? retint_careful (arch/x86/kernel/entry_64.S:889)
[ 921.917752] ? preempt_schedule (./arch/x86/include/asm/preempt.h:80 (discriminator 1) kernel/sched/core.c:2943 (discriminator 1))
[ 921.917752] ? preempt_schedule_context (./arch/x86/include/asm/preempt.h:75 kernel/context_tracking.c:143)
[ 921.917752] ? ___preempt_schedule_context (arch/x86/lib/thunk_64.S:44)
[ 921.917752] ? preempt_schedule_context (kernel/context_tracking.c:145)
[ 921.917752] ? ___preempt_schedule_context (arch/x86/lib/thunk_64.S:44)
[ 921.917752] ? preempt_schedule_context (kernel/context_tracking.c:145)
[ 921.917752] ? ___preempt_schedule_context (arch/x86/lib/thunk_64.S:44)
[ 921.917752] ? preempt_schedule_context (kernel/context_tracking.c:145)
[ 921.917752] ? ___preempt_schedule_context (arch/x86/lib/thunk_64.S:44)
[ 921.917752] ? preempt_schedule_context (kernel/context_tracking.c:145)
[ 921.917752] ? ___preempt_schedule_context (arch/x86/lib/thunk_64.S:44)
[ 921.917752] ? preempt_schedule_context (kernel/context_tracking.c:145)
[ 921.917752] ? ___preempt_schedule_context (arch/x86/lib/thunk_64.S:44)
[ 921.917752] ? preempt_schedule_context (kernel/context_tracking.c:145)
[ 921.917752] ? ___preempt_schedule_context (arch/x86/lib/thunk_64.S:44)
[ 921.917752] ? preempt_schedule_context (kernel/context_tracking.c:145)
[ 921.917752] ? ___preempt_schedule_context (arch/x86/lib/thunk_64.S:44)
[ 921.917752] ? preempt_schedule_context (kernel/context_tracking.c:145)
[ 921.917752] ? ___preempt_schedule_context (arch/x86/lib/thunk_64.S:44)
[ 921.917752] ? preempt_schedule_context (kernel/context_tracking.c:145)
[ 921.917752] ? ___preempt_schedule_context (arch/x86/lib/thunk_64.S:44)
[ 921.917752] ? preempt_schedule_context (kernel/context_tracking.c:145)
[ 921.917752] ? ___preempt_schedule_context (arch/x86/lib/thunk_64.S:44)
[ 921.917752] ? preempt_schedule_context (kernel/context_tracking.c:145)
[ 921.917752] ? ___preempt_schedule_context (arch/x86/lib/thunk_64.S:44)
[ 921.917752] ? preempt_schedule_context (kernel/context_tracking.c:145)
[ 921.917752] ? ___preempt_schedule_context (arch/x86/lib/thunk_64.S:44)
[ 921.917752] ? preempt_schedule_context (kernel/context_tracking.c:145)
[ 921.917752] ? ___preempt_schedule_context (arch/x86/lib/thunk_64.S:44)
[ 921.917752] ? preempt_schedule_context (kernel/context_tracking.c:145)
[ 921.917752] ? ___preempt_schedule_context (arch/x86/lib/thunk_64.S:44)
[ 921.917752] ? preempt_schedule_context (kernel/context_tracking.c:145)
[ 921.917752] ? ___preempt_schedule_context (arch/x86/lib/thunk_64.S:44)
[ 921.917752] ? preempt_schedule_context (kernel/context_tracking.c:145)
[ 921.917752] ? ___preempt_schedule_context (arch/x86/lib/thunk_64.S:44)
[ 921.917752] ? preempt_schedule_context (kernel/context_tracking.c:145)
[ 921.917752] ? ___preempt_schedule_context (arch/x86/lib/thunk_64.S:44)
[ 921.917752] ? preempt_schedule_context (kernel/context_tracking.c:145)
[ 921.917752] ? ___preempt_schedule_context (arch/x86/lib/thunk_64.S:44)
[ 921.917752] ? preempt_schedule_context (kernel/context_tracking.c:145)
[ 921.917752] ? ___preempt_schedule_context (arch/x86/lib/thunk_64.S:44)
[ 921.917752] ? preempt_schedule_context (kernel/context_tracking.c:145)
[ 921.917752] ? ___preempt_schedule_context (arch/x86/lib/thunk_64.S:44)
[ 921.917752] ? preempt_schedule_context (kernel/context_tracking.c:145)
[ 921.917752] ? ___preempt_schedule_context (arch/x86/lib/thunk_64.S:44)
[ 921.917752] ? preempt_schedule_context (kernel/context_tracking.c:145)
[ 921.917752] ? ___preempt_schedule_context (arch/x86/lib/thunk_64.S:44)
[ 921.917752] ? preempt_schedule_context (kernel/context_tracking.c:145)
[ 921.917752] ? ___preempt_schedule_context (arch/x86/lib/thunk_64.S:44)
[ 921.917752] ? preempt_schedule_context (kernel/context_tracking.c:145)
[ 921.917752] ? ___preempt_schedule_context (arch/x86/lib/thunk_64.S:44)
[ 921.917752] ? preempt_schedule_context (kernel/context_tracking.c:145)
[ 921.917752] ? ___preempt_schedule_context (arch/x86/lib/thunk_64.S:44)
[ 921.917752] ? preempt_schedule_context (kernel/context_tracking.c:145)
[ 921.917752] ? ___preempt_schedule_context (arch/x86/lib/thunk_64.S:44)
[ 921.917752] ? preempt_schedule_context (kernel/context_tracking.c:145)
[ 921.917752] ? ___preempt_schedule_context (arch/x86/lib/thunk_64.S:44)
[ 921.917752] ? preempt_schedule_context (kernel/context_tracking.c:145)
[ 921.917752] ? ___preempt_schedule_context (arch/x86/lib/thunk_64.S:44)
[ 921.917752] ? preempt_schedule_context (kernel/context_tracking.c:145)
[ 921.917752] ? ___preempt_schedule_context (arch/x86/lib/thunk_64.S:44)
[ 921.917752] ? preempt_schedule_context (kernel/context_tracking.c:145)
[ 921.917752] ? ___preempt_schedule_context (arch/x86/lib/thunk_64.S:44)
[ 921.917752] ? preempt_schedule_context (kernel/context_tracking.c:145)
[ 921.917752] ? ___preempt_schedule_context (arch/x86/lib/thunk_64.S:44)
[ 921.917752] ? preempt_schedule_context (kernel/context_tracking.c:145)
[ 921.917752] ? ___preempt_schedule_context (arch/x86/lib/thunk_64.S:44)
[ 921.917752] ? preempt_schedule_context (kernel/context_tracking.c:145)
[ 921.917752] ? ___preempt_schedule_context (arch/x86/lib/thunk_64.S:44)
[ 921.917752] ? preempt_schedule_context (kernel/context_tracking.c:145)
[ 921.917752] ? ___preempt_schedule_context (arch/x86/lib/thunk_64.S:44)
[ 921.917752] ? preempt_schedule_context (kernel/context_tracking.c:145)
[ 921.917752] ? ___preempt_schedule_context (arch/x86/lib/thunk_64.S:44)
[ 921.917752] ? preempt_schedule_context (kernel/context_tracking.c:145)
[ 921.917752] ? ___preempt_schedule_context (arch/x86/lib/thunk_64.S:44)
[ 921.917752] ? preempt_schedule_context (kernel/context_tracking.c:145)
[ 921.917752] ? ___preempt_schedule_context (arch/x86/lib/thunk_64.S:44)
[ 921.917752] ? preempt_schedule_context (kernel/context_tracking.c:145)
[ 921.917752] ? ___preempt_schedule_context (arch/x86/lib/thunk_64.S:44)
[ 921.917752] ? preempt_schedule_context (kernel/context_tracking.c:145)
[ 921.917752] ? ___preempt_schedule_context (arch/x86/lib/thunk_64.S:44)
[ 921.917752] ? preempt_schedule_context (kernel/context_tracking.c:145)
[ 921.917752] ? ___preempt_schedule_context (arch/x86/lib/thunk_64.S:44)
[ 921.917752] ? preempt_schedule_context (kernel/context_tracking.c:145)
[ 921.917752] ? ___preempt_schedule_context (arch/x86/lib/thunk_64.S:44)
[ 921.917752] ? preempt_schedule_context (kernel/context_tracking.c:145)
[ 921.917752] ? ___preempt_schedule_context (arch/x86/lib/thunk_64.S:44)
[ 921.917752] ? preempt_schedule_context (kernel/context_tracking.c:145)
[ 921.917752] ? ___preempt_schedule_context (arch/x86/lib/thunk_64.S:44)
[ 921.917752] ? preempt_schedule_context (kernel/context_tracking.c:145)
[ 921.917752] ? ___preempt_schedule_context (arch/x86/lib/thunk_64.S:44)
[ 921.917752] ? preempt_schedule_context (kernel/context_tracking.c:145)
[ 921.917752] ? ___preempt_schedule_context (arch/x86/lib/thunk_64.S:44)
[ 921.917752] ? preempt_schedule_context (kernel/context_tracking.c:145)
[ 921.917752] ? ___preempt_schedule_context (arch/x86/lib/thunk_64.S:44)
[ 921.917752] ? preempt_schedule_context (kernel/context_tracking.c:145)
[ 921.917752] ? ___preempt_schedule_context (arch/x86/lib/thunk_64.S:44)
[ 921.917752] ? preempt_schedule_context (kernel/context_tracking.c:145)
[ 921.917752] ? ___preempt_schedule_context (arch/x86/lib/thunk_64.S:44)
[ 921.917752] ? preempt_schedule_context (kernel/context_tracking.c:145)
[ 921.917752] ? ___preempt_schedule_context (arch/x86/lib/thunk_64.S:44)
[ 921.917752] ? preempt_schedule_context (kernel/context_tracking.c:145)
[ 921.917752] ? ___preempt_schedule_context (arch/x86/lib/thunk_64.S:44)
[ 921.917752] ? preempt_schedule_context (kernel/context_tracking.c:145)
[ 921.917752] ? ___preempt_schedule_context (arch/x86/lib/thunk_64.S:44)
[ 921.917752] ? preempt_schedule_context (kernel/context_tracking.c:145)
[ 921.917752] ? ___preempt_schedule_context (arch/x86/lib/thunk_64.S:44)
[ 921.917752] ? preempt_schedule_context (kernel/context_tracking.c:145)
[ 921.917752] ? ___preempt_schedule_context (arch/x86/lib/thunk_64.S:44)
[ 921.917752] ? preempt_schedule_context (kernel/context_tracking.c:145)
[ 921.917752] ? ___preempt_schedule_context (arch/x86/lib/thunk_64.S:44)
[ 921.917752] ? preempt_schedule_context (kernel/context_tracking.c:145)
[ 921.917752] ? ___preempt_schedule_context (arch/x86/lib/thunk_64.S:44)
[ 921.917752] ? preempt_schedule_context (kernel/context_tracking.c:145)
[ 921.917752] ? ___preempt_schedule_context (arch/x86/lib/thunk_64.S:44)
[ 921.917752] ? preempt_schedule_context (kernel/context_tracking.c:145)
[ 921.917752] ? ___preempt_schedule_context (arch/x86/lib/thunk_64.S:44)
[ 921.917752] ? preempt_schedule_context (kernel/context_tracking.c:145)
[ 921.917752] ? ___preempt_schedule_context (arch/x86/lib/thunk_64.S:44)
[ 921.917752] ? preempt_schedule_context (kernel/context_tracking.c:145)
[ 921.917752] ? ___preempt_schedule_context (arch/x86/lib/thunk_64.S:44)
[ 921.917752] ? preempt_schedule_context (kernel/context_tracking.c:145)
[ 921.917752] ? ___preempt_schedule_context (arch/x86/lib/thunk_64.S:44)
[ 921.917752] ? preempt_schedule_context (kernel/context_tracking.c:145)
[ 921.917752] ? ___preempt_schedule_context (arch/x86/lib/thunk_64.S:44)
[ 921.917752] ? preempt_schedule_context (kernel/context_tracking.c:145)
[ 921.917752] ? ___preempt_schedule_context (arch/x86/lib/thunk_64.S:44)
[ 921.917752] ? preempt_schedule_context (kernel/context_tracking.c:145)
[ 921.917752] ? ___preempt_schedule_context (arch/x86/lib/thunk_64.S:44)
[ 921.917752] ? preempt_schedule_context (kernel/context_tracking.c:145)
[ 921.917752] ? ___preempt_schedule_context (arch/x86/lib/thunk_64.S:44)
[ 921.917752] ? preempt_schedule_context (kernel/context_tracking.c:145)
[ 921.917752] ? ___preempt_schedule_context (arch/x86/lib/thunk_64.S:44)
[ 921.917752] ? preempt_schedule_context (kernel/context_tracking.c:145)
[ 921.917752] ? ___preempt_schedule_context (arch/x86/lib/thunk_64.S:44)
[ 921.917752] ? preempt_schedule_context (kernel/context_tracking.c:145)
[ 921.917752] ? ___preempt_schedule_context (arch/x86/lib/thunk_64.S:44)
[ 921.917752] ? preempt_schedule_context (kernel/context_tracking.c:145)
[ 921.917752] ? ___preempt_schedule_context (arch/x86/lib/thunk_64.S:44)
[ 921.917752] ? preempt_schedule_context (kernel/context_tracking.c:145)
[ 921.917752] ? ___preempt_schedule_context (arch/x86/lib/thunk_64.S:44)
[ 921.917752] ? preempt_schedule_context (kernel/context_tracking.c:145)
[ 921.917752] ? ___preempt_schedule_context (arch/x86/lib/thunk_64.S:44)
[ 921.917752] ? preempt_schedule_context (kernel/context_tracking.c:145)
[ 921.917752] ? ___preempt_schedule_context (arch/x86/lib/thunk_64.S:44)
[ 921.917752] ? preempt_schedule_context (kernel/context_tracking.c:145)
[ 921.917752] ? ___preempt_schedule_context (arch/x86/lib/thunk_64.S:44)
[ 921.917752] ? preempt_schedule_context (kernel/context_tracking.c:145)
[ 921.917752] ? ___preempt_schedule_context (arch/x86/lib/thunk_64.S:44)
[ 921.917752] ? preempt_schedule_context (kernel/context_tracking.c:145)
[ 921.917752] ? ___preempt_schedule_context (arch/x86/lib/thunk_64.S:44)
[ 921.917752] ? preempt_schedule_context (kernel/context_tracking.c:145)
[ 921.917752] ? ___preempt_schedule_context (arch/x86/lib/thunk_64.S:44)
[ 921.917752] ? preempt_schedule_context (kernel/context_tracking.c:145)
[ 921.917752] ? ___preempt_schedule_context (arch/x86/lib/thunk_64.S:44)
[ 921.917752] ? preempt_schedule_context (kernel/context_tracking.c:145)
[ 921.917752] ? ___preempt_schedule_context (arch/x86/lib/thunk_64.S:44)
[ 921.917752] ? preempt_schedule_context (kernel/context_tracking.c:145)
[ 921.917752] ? ___preempt_schedule_context (arch/x86/lib/thunk_64.S:44)
[ 921.917752] ? preempt_schedule_context (kernel/context_tracking.c:145)
[ 921.917752] ? ___preempt_schedule_context (arch/x86/lib/thunk_64.S:44)
[ 921.917752] ? preempt_schedule_context (kernel/context_tracking.c:145)
[ 921.917752] ? ___preempt_schedule_context (arch/x86/lib/thunk_64.S:44)
[ 921.917752] ? preempt_schedule_context (kernel/context_tracking.c:145)
[ 921.917752] ? ___preempt_schedule_context (arch/x86/lib/thunk_64.S:44)
[ 921.917752] ? preempt_schedule_context (kernel/context_tracking.c:145)
[ 921.917752] ? ___preempt_schedule_context (arch/x86/lib/thunk_64.S:44)
[ 921.917752] ? preempt_schedule_context (kernel/context_tracking.c:145)
[ 921.917752] ? ___preempt_schedule_context (arch/x86/lib/thunk_64.S:44)
[ 921.917752] ? preempt_schedule_context (kernel/context_tracking.c:145)
[ 921.917752] ? ___preempt_schedule_context (arch/x86/lib/thunk_64.S:44)
[ 921.917752] ? preempt_schedule_context (kernel/context_tracking.c:145)
[ 921.917752] ? ___preempt_schedule_context (arch/x86/lib/thunk_64.S:44)
[ 921.917752] ? preempt_schedule_context (kernel/context_tracking.c:145)
[ 921.917752] ? ___preempt_schedule_context (arch/x86/lib/thunk_64.S:44)
[ 921.917752] ? preempt_schedule_context (kernel/context_tracking.c:145)
[ 921.917752] ? ___preempt_schedule_context (arch/x86/lib/thunk_64.S:44)
[ 921.917752] ? preempt_schedule_context (kernel/context_tracking.c:145)
[ 921.917752] ? ___preempt_schedule_context (arch/x86/lib/thunk_64.S:44)
[ 921.917752] ? preempt_schedule_context (kernel/context_tracking.c:145)
[ 921.917752] ? ___preempt_schedule_context (arch/x86/lib/thunk_64.S:44)
[ 921.917752] ? preempt_schedule_context (kernel/context_tracking.c:145)
[ 921.917752] ? ___preempt_schedule_context (arch/x86/lib/thunk_64.S:44)
[ 921.917752] ? preempt_schedule_context (kernel/context_tracking.c:145)
[ 921.917752] ? ___preempt_schedule_context (arch/x86/lib/thunk_64.S:44)
[ 921.917752] ? preempt_schedule_context (kernel/context_tracking.c:145)
[ 921.917752] ? ___preempt_schedule_context (arch/x86/lib/thunk_64.S:44)
[ 921.917752] ? preempt_schedule_context (kernel/context_tracking.c:145)
[ 921.917752] ? ___preempt_schedule_context (arch/x86/lib/thunk_64.S:44)
[ 921.917752] ? preempt_schedule_context (kernel/context_tracking.c:145)
[ 921.917752] ? ___preempt_schedule_context (arch/x86/lib/thunk_64.S:44)
[ 921.917752] ? preempt_schedule_context (kernel/context_tracking.c:145)
[ 921.917752] ? ___preempt_schedule_context (arch/x86/lib/thunk_64.S:44)
[ 921.917752] ? preempt_schedule_context (kernel/context_tracking.c:145)
[ 921.917752] ? ___preempt_schedule_context (arch/x86/lib/thunk_64.S:44)
[ 921.917752] ? preempt_schedule_context (kernel/context_tracking.c:145)
[ 921.917752] ? ___preempt_schedule_context (arch/x86/lib/thunk_64.S:44)
[ 921.917752] ? preempt_schedule_context (kernel/context_tracking.c:145)
[ 921.917752] ? ___preempt_schedule_context (arch/x86/lib/thunk_64.S:44)
[ 921.917752] ? preempt_schedule_context (kernel/context_tracking.c:145)
[ 921.917752] ? ___preempt_schedule_context (arch/x86/lib/thunk_64.S:44)
[ 921.917752] ? preempt_schedule_context (kernel/context_tracking.c:145)
[ 921.917752] ? ___preempt_schedule_context (arch/x86/lib/thunk_64.S:44)
[ 921.917752] ? preempt_schedule_context (kernel/context_tracking.c:145)
[ 921.917752] ? ___preempt_schedule_context (arch/x86/lib/thunk_64.S:44)
[ 921.917752] ? preempt_schedule_context (kernel/context_tracking.c:145)
[ 921.917752] ? ___preempt_schedule_context (arch/x86/lib/thunk_64.S:44)
[ 921.917752] ? preempt_schedule_context (kernel/context_tracking.c:145)
[ 921.917752] ? ___preempt_schedule_context (arch/x86/lib/thunk_64.S:44)
[ 921.917752] ? preempt_schedule_context (kernel/context_tracking.c:145)
[ 921.917752] ? ___preempt_schedule_context (arch/x86/lib/thunk_64.S:44)
[ 921.917752] ? preempt_schedule_context (kernel/context_tracking.c:145)
[ 921.917752] ? ___preempt_schedule_context (arch/x86/lib/thunk_64.S:44)
[ 921.917752] ? preempt_schedule_context (kernel/context_tracking.c:145)
[ 921.917752] ? ___preempt_schedule_context (arch/x86/lib/thunk_64.S:44)
[ 921.917752] ? preempt_schedule_context (kernel/context_tracking.c:145)
[ 921.917752] ? ___preempt_schedule_context (arch/x86/lib/thunk_64.S:44)
[ 921.917752] ? preempt_schedule_context (kernel/context_tracking.c:145)
[ 921.917752] ? ___preempt_schedule_context (arch/x86/lib/thunk_64.S:44)
[ 921.917752] ? preempt_schedule_context (kernel/context_tracking.c:145)
[ 921.917752] ? ___preempt_schedule_context (arch/x86/lib/thunk_64.S:44)
[ 921.917752] ? preempt_schedule_context (kernel/context_tracking.c:145)
[ 921.917752] ? ___preempt_schedule_context (arch/x86/lib/thunk_64.S:44)
[ 921.917752] ? preempt_schedule_context (kernel/context_tracking.c:145)
[ 921.917752] ? ___preempt_schedule_context (arch/x86/lib/thunk_64.S:44)
[ 921.917752] ? preempt_schedule_context (kernel/context_tracking.c:145)
[ 921.917752] ? ___preempt_schedule_context (arch/x86/lib/thunk_64.S:44)
[ 921.917752] ? preempt_schedule_context (kernel/context_tracking.c:145)
[ 921.917752] ? ___preempt_schedule_context (arch/x86/lib/thunk_64.S:44)
[ 921.917752] ? preempt_schedule_context (kernel/context_tracking.c:145)
[ 921.917752] ? ___preempt_schedule_context (arch/x86/lib/thunk_64.S:44)
[ 921.917752] ? preempt_schedule_context (kernel/context_tracking.c:145)
[ 921.917752] ? ___preempt_schedule_context (arch/x86/lib/thunk_64.S:44)
[ 921.917752] ? preempt_schedule_context (kernel/context_tracking.c:145)
[ 921.917752] ? ___preempt_schedule_context (arch/x86/lib/thunk_64.S:44)
[ 921.917752] ? preempt_schedule_context (kernel/context_tracking.c:145)
[ 921.917752] ? ___preempt_schedule_context (arch/x86/lib/thunk_64.S:44)
[ 921.917752] ? preempt_schedule_context (kernel/context_tracking.c:145)
[ 921.917752] ? ___preempt_schedule_context (arch/x86/lib/thunk_64.S:44)
[ 921.917752] ? preempt_schedule_context (kernel/context_tracking.c:145)
[ 921.917752] ? ___preempt_schedule_context (arch/x86/lib/thunk_64.S:44)
[ 921.917752] ? preempt_schedule_context (kernel/context_tracking.c:145)
[ 921.917752] ? ___preempt_schedule_context (arch/x86/lib/thunk_64.S:44)
[ 921.917752] ? preempt_schedule_context (kernel/context_tracking.c:145)
[ 921.917752] ? ___preempt_schedule_context (arch/x86/lib/thunk_64.S:44)
[ 921.917752] ? preempt_schedule_context (kernel/context_tracking.c:145)
[ 921.917752] ? ___preempt_schedule_context (arch/x86/lib/thunk_64.S:44)
[ 921.917752] ? preempt_schedule_context (kernel/context_tracking.c:145)
[ 921.917752] ? ___preempt_schedule_context (arch/x86/lib/thunk_64.S:44)
[ 921.917752] ? preempt_schedule_context (kernel/context_tracking.c:145)
[ 921.917752] ? ___preempt_schedule_context (arch/x86/lib/thunk_64.S:44)
[ 921.917752] ? preempt_schedule_context (kernel/context_tracking.c:145)
[ 921.917752] ? ___preempt_schedule_context (arch/x86/lib/thunk_64.S:44)
[ 921.917752] ? preempt_schedule_context (kernel/context_tracking.c:145)
[ 921.917752] ? ___preempt_schedule_context (arch/x86/lib/thunk_64.S:44)
[ 921.917752] ? preempt_schedule_context (kernel/context_tracking.c:145)
[ 921.917752] ? ___preempt_schedule_context (arch/x86/lib/thunk_64.S:44)
[ 921.917752] ? preempt_schedule_context (kernel/context_tracking.c:145)
[ 921.917752] ? ___preempt_schedule_context (arch/x86/lib/thunk_64.S:44)
[ 921.917752] ? preempt_schedule_context (kernel/context_tracking.c:145)
[ 921.917752] ? ___preempt_schedule_context (arch/x86/lib/thunk_64.S:44)
[ 921.917752] ? preempt_schedule_context (kernel/context_tracking.c:145)
[ 921.917752] ? ___preempt_schedule_context (arch/x86/lib/thunk_64.S:44)
[ 921.917752] ? preempt_schedule_context (kernel/context_tracking.c:145)
[ 921.917752] ? ___preempt_schedule_context (arch/x86/lib/thunk_64.S:44)
[ 921.917752] ? preempt_schedule_context (kernel/context_tracking.c:145)
[ 921.917752] ? __schedule (kernel/sched/core.c:2900)
[ 921.917752] ? ___preempt_schedule_context (arch/x86/lib/thunk_64.S:44)
[ 921.917752] ? ftrace_ops_control_func (kernel/trace/ftrace.c:4780)
[ 921.917752] ? ftrace_call (arch/x86/kernel/mcount_64.S:56)
[ 921.917752] ? retint_careful (arch/x86/kernel/entry_64.S:886)
[ 921.917752] ? __this_cpu_preempt_check (lib/smp_processor_id.c:63)
[ 921.917752] ? schedule_user (kernel/sched/core.c:2900)
[ 921.917752] ? schedule_user (kernel/sched/core.c:2900)
[ 921.917752] ? retint_careful (arch/x86/kernel/entry_64.S:889)
[ 921.917752] Code: 48 c7 c2 50 2d 72 97 be 72 00 00 00 48 c7 c7 eb 26 73 97 c6 05 37 b3 ac 02 01 e8 d4 06 c6 fc e9 0d fb ff ff 0f 1f 80 00 00 00 00 <0f> 0b 66 0f 1f 44 00 00 48 8b 45 c8 48 8b 00 48 83 f8 40 0f 84
All code
========
0: 48 c7 c2 50 2d 72 97 mov $0xffffffff97722d50,%rdx
7: be 72 00 00 00 mov $0x72,%esi
c: 48 c7 c7 eb 26 73 97 mov $0xffffffff977326eb,%rdi
13: c6 05 37 b3 ac 02 01 movb $0x1,0x2acb337(%rip) # 0x2acb351
1a: e8 d4 06 c6 fc callq 0xfffffffffcc606f3
1f: e9 0d fb ff ff jmpq 0xfffffffffffffb31
24: 0f 1f 80 00 00 00 00 nopl 0x0(%rax)
2b:* 0f 0b ud2 <-- trapping instruction
2d: 66 0f 1f 44 00 00 nopw 0x0(%rax,%rax,1)
33: 48 8b 45 c8 mov -0x38(%rbp),%rax
37: 48 8b 00 mov (%rax),%rax
3a: 48 83 f8 40 cmp $0x40,%rax
3e: 0f .byte 0xf
3f: 84 00 test %al,(%rax)

Code starting with the faulting instruction
===========================================
0: 0f 0b ud2
2: 66 0f 1f 44 00 00 nopw 0x0(%rax,%rax,1)
8: 48 8b 45 c8 mov -0x38(%rbp),%rax
c: 48 8b 00 mov (%rax),%rax
f: 48 83 f8 40 cmp $0x40,%rax
13: 0f .byte 0xf
14: 84 00 test %al,(%rax)
[ 921.917752] RIP __schedule (kernel/sched/core.c:2702 kernel/sched/core.c:2808)
[ 921.917752] RSP <ffff8802bda3c360>
[ 922.457643] BUG: unable to handle kernel paging request at fffffffc310ead68
[ 922.458855] IP: cpuacct_charge (kernel/sched/cpuacct.c:247)
[ 922.467627] PGD 17e23067 PUD 0
[ 922.467627] Thread overran stack, or stack corrupted
[ 922.467627] Oops: 0000 [#2] PREEMPT SMP DEBUG_PAGEALLOC
[ 922.467627] Dumping ftrace buffer:
[ 922.467627] (ftrace buffer empty)
[ 922.467627] Modules linked in:
[ 922.467627] CPU: 18 PID: 9489 Comm: trinity-c195 Tainted: G D 3.17.0-rc7-next-20141002-sasha-00031-gbdb4244 #1273
[ 922.467627] task: ffff8802bd748000 ti: ffff8802bda3c000 task.ti: ffff8802bda3c000
[ 922.467627] RIP: cpuacct_charge (kernel/sched/cpuacct.c:247)
[ 922.467627] RSP: 0018:ffff880850003d28 EFLAGS: 00010046
[ 922.467627] RAX: 000000000000f128 RBX: 00000000932539cd RCX: ffffffff932539cd
[ 922.467627] RDX: ffffffff97ea5500 RSI: 0000000000000000 RDI: 0000000000000086
[ 922.467627] RBP: ffff880850003d58 R08: 0000000000000000 R09: 0000000000000001
[ 922.467627] R10: 0000000000000000 R11: 0000000000009a86 R12: 00000000128d0aa7
[ 922.467627] R13: ffff8802bd748000 R14: ffffffff98afaa40 R15: 0000000000000400
[ 922.467627] FS: 00007f5475cc2700(0000) GS:ffff880850000000(0000) knlGS:0000000000000000
[ 922.467627] CS: 0010 DS: 0000 ES: 0000 CR0: 000000008005003b
[ 922.467627] CR2: fffffffc310ead68 CR3: 00000002bebab000 CR4: 00000000000006a0
[ 922.467627] DR0: 00000000006f0000 DR1: 0000000000000000 DR2: 0000000000000000
[ 922.467627] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
[ 922.467627] Stack:
[ 922.467627] ffffffff931bdb35 ffffffff931bdb35 ffff8802bd748068 ffff88084f106f90
[ 922.467627] 00000000128d0aa7 ffff8802bd748000 ffff880850003d98 ffffffff931a7b86
[ 922.467627] 000000000001aa9a ffff8802bd748068 ffff88084f106f90 0000000000000000
[ 922.467627] Call Trace:
[ 922.467627] <IRQ>
[ 922.467627] ? cpuacct_charge (kernel/sched/cpuacct.c:236)
[ 922.467627] ? cpuacct_charge (kernel/sched/cpuacct.c:236)
[ 922.467627] update_curr (kernel/sched/stats.h:259 kernel/sched/fair.c:723)
[ 922.467627] task_tick_fair (kernel/sched/fair.c:2526 (discriminator 2) kernel/sched/fair.c:7512 (discriminator 2))
[ 922.467627] scheduler_tick (kernel/sched/core.c:2564)
[ 922.467627] update_process_times (kernel/time/timer.c:1391)
[ 922.467627] tick_sched_handle.isra.14 (kernel/time/tick-sched.c:152)
[ 922.467627] tick_sched_timer (kernel/time/tick-sched.c:1117)
[ 922.467627] __run_hrtimer (kernel/time/hrtimer.c:1218 (discriminator 3))
[ 922.467627] ? tick_sched_do_timer (kernel/time/tick-sched.c:1101)
[ 922.467627] hrtimer_interrupt (kernel/time/hrtimer.c:1307)
[ 922.467627] local_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:921)
[ 922.467627] smp_apic_timer_interrupt (./arch/x86/include/asm/apic.h:660 arch/x86/kernel/apic/apic.c:945)
[ 922.467627] apic_timer_interrupt (arch/x86/kernel/entry_64.S:999)
[ 922.467627] <EOI>
[ 922.467627] ? oops_end (./arch/x86/include/asm/paravirt.h:809 arch/x86/kernel/dumpstack.c:240)
[ 922.467627] die (arch/x86/kernel/dumpstack.c:313)
[ 922.467627] do_trap (arch/x86/kernel/traps.c:132 arch/x86/kernel/traps.c:178)
[ 922.467627] do_error_trap (arch/x86/kernel/traps.c:216 include/linux/jump_label.h:114 include/linux/context_tracking_state.h:27 include/linux/context_tracking.h:45 arch/x86/kernel/traps.c:220)
[ 922.467627] ? __schedule (kernel/sched/core.c:2702 kernel/sched/core.c:2808)
[ 922.467627] ? error_sti (arch/x86/kernel/entry_64.S:1398)
[ 922.467627] ? __this_cpu_preempt_check (lib/smp_processor_id.c:63)
[ 922.467627] do_invalid_op (arch/x86/kernel/traps.c:232)
[ 922.467627] invalid_op (arch/x86/kernel/entry_64.S:1125)
[ 922.467627] ? __schedule (kernel/sched/core.c:2702 kernel/sched/core.c:2808)
[ 922.467627] schedule_user (kernel/sched/core.c:2894 include/linux/jump_label.h:114 include/linux/context_tracking_state.h:27 include/linux/context_tracking.h:20 kernel/sched/core.c:2909)
[ 922.467627] int_careful (arch/x86/kernel/entry_64.S:560)
[ 922.467627] ? retint_careful (arch/x86/kernel/entry_64.S:889)
[ 922.467627] ? preempt_schedule (./arch/x86/include/asm/preempt.h:80 (discriminator 1) kernel/sched/core.c:2943 (discriminator 1))
[ 922.467627] ? preempt_schedule_context (./arch/x86/include/asm/preempt.h:75 kernel/context_tracking.c:143)
[ 922.467627] ? ___preempt_schedule_context (arch/x86/lib/thunk_64.S:44)
[ 922.467627] ? preempt_schedule_context (kernel/context_tracking.c:145)
[ 922.467627] ? ___preempt_schedule_context (arch/x86/lib/thunk_64.S:44)
[ 922.467627] ? preempt_schedule_context (kernel/context_tracking.c:145)
[ 922.467627] ? ___preempt_schedule_context (arch/x86/lib/thunk_64.S:44)
[ 922.467627] ? preempt_schedule_context (kernel/context_tracking.c:145)
[ 922.467627] ? ___preempt_schedule_context (arch/x86/lib/thunk_64.S:44)
[ 922.467627] ? preempt_schedule_context (kernel/context_tracking.c:145)
[ 922.467627] ? ___preempt_schedule_context (arch/x86/lib/thunk_64.S:44)
[ 922.467627] ? preempt_schedule_context (kernel/context_tracking.c:145)
[ 922.467627] ? ___preempt_schedule_context (arch/x86/lib/thunk_64.S:44)
[ 922.467627] ? preempt_schedule_context (kernel/context_tracking.c:145)
[ 922.467627] ? ___preempt_schedule_context (arch/x86/lib/thunk_64.S:44)
[ 922.467627] ? preempt_schedule_context (kernel/context_tracking.c:145)
[ 922.467627] ? ___preempt_schedule_context (arch/x86/lib/thunk_64.S:44)
[ 922.467627] ? preempt_schedule_context (kernel/context_tracking.c:145)
[ 922.467627] ? ___preempt_schedule_context (arch/x86/lib/thunk_64.S:44)
[ 922.467627] ? preempt_schedule_context (kernel/context_tracking.c:145)
[ 922.467627] ? ___preempt_schedule_context (arch/x86/lib/thunk_64.S:44)
[ 922.467627] ? preempt_schedule_context (kernel/context_tracking.c:145)
[ 922.467627] ? ___preempt_schedule_context (arch/x86/lib/thunk_64.S:44)
[ 922.467627] ? preempt_schedule_context (kernel/context_tracking.c:145)
[ 922.467627] ? ___preempt_schedule_context (arch/x86/lib/thunk_64.S:44)
[ 922.467627] ? preempt_schedule_context (kernel/context_tracking.c:145)
[ 922.467627] ? ___preempt_schedule_context (arch/x86/lib/thunk_64.S:44)
[ 922.467627] ? preempt_schedule_context (kernel/context_tracking.c:145)
[ 922.467627] ? ___preempt_schedule_context (arch/x86/lib/thunk_64.S:44)
[ 922.467627] ? preempt_schedule_context (kernel/context_tracking.c:145)
[ 922.467627] ? ___preempt_schedule_context (arch/x86/lib/thunk_64.S:44)
[ 922.467627] ? preempt_schedule_context (kernel/context_tracking.c:145)
[ 922.467627] ? ___preempt_schedule_context (arch/x86/lib/thunk_64.S:44)
[ 922.467627] ? preempt_schedule_context (kernel/context_tracking.c:145)
[ 922.467627] ? ___preempt_schedule_context (arch/x86/lib/thunk_64.S:44)
[ 922.467627] ? preempt_schedule_context (kernel/context_tracking.c:145)
[ 922.467627] ? ___preempt_schedule_context (arch/x86/lib/thunk_64.S:44)
[ 922.467627] ? preempt_schedule_context (kernel/context_tracking.c:145)
[ 922.467627] ? ___preempt_schedule_context (arch/x86/lib/thunk_64.S:44)
[ 922.467627] ? preempt_schedule_context (kernel/context_tracking.c:145)
[ 922.467627] ? ___preempt_schedule_context (arch/x86/lib/thunk_64.S:44)
[ 922.467627] ? preempt_schedule_context (kernel/context_tracking.c:145)
[ 922.467627] ? ___preempt_schedule_context (arch/x86/lib/thunk_64.S:44)
[ 922.467627] ? preempt_schedule_context (kernel/context_tracking.c:145)
[ 922.467627] ? ___preempt_schedule_context (arch/x86/lib/thunk_64.S:44)
[ 922.467627] ? preempt_schedule_context (kernel/context_tracking.c:145)
[ 922.467627] ? ___preempt_schedule_context (arch/x86/lib/thunk_64.S:44)
[ 922.467627] ? preempt_schedule_context (kernel/context_tracking.c:145)
[ 922.467627] ? ___preempt_schedule_context (arch/x86/lib/thunk_64.S:44)
[ 922.467627] ? preempt_schedule_context (kernel/context_tracking.c:145)
[ 922.467627] ? ___preempt_schedule_context (arch/x86/lib/thunk_64.S:44)
[ 922.467627] ? preempt_schedule_context (kernel/context_tracking.c:145)
[ 922.467627] ? ___preempt_schedule_context (arch/x86/lib/thunk_64.S:44)
[ 922.467627] ? preempt_schedule_context (kernel/context_tracking.c:145)
[ 922.467627] ? ___preempt_schedule_context (arch/x86/lib/thunk_64.S:44)
[ 922.467627] ? preempt_schedule_context (kernel/context_tracking.c:145)
[ 922.467627] ? ___preempt_schedule_context (arch/x86/lib/thunk_64.S:44)
[ 922.467627] ? preempt_schedule_context (kernel/context_tracking.c:145)
[ 922.467627] ? ___preempt_schedule_context (arch/x86/lib/thunk_64.S:44)
[ 922.467627] ? preempt_schedule_context (kernel/context_tracking.c:145)
[ 922.467627] ? ___preempt_schedule_context (arch/x86/lib/thunk_64.S:44)
[ 922.467627] ? preempt_schedule_context (kernel/context_tracking.c:145)
[ 922.467627] ? ___preempt_schedule_context (arch/x86/lib/thunk_64.S:44)
[ 922.467627] ? preempt_schedule_context (kernel/context_tracking.c:145)
[ 922.467627] ? ___preempt_schedule_context (arch/x86/lib/thunk_64.S:44)
[ 922.467627] ? preempt_schedule_context (kernel/context_tracking.c:145)
[ 922.467627] ? ___preempt_schedule_context (arch/x86/lib/thunk_64.S:44)
[ 922.467627] ? preempt_schedule_context (kernel/context_tracking.c:145)
[ 922.467627] ? ___preempt_schedule_context (arch/x86/lib/thunk_64.S:44)
[ 922.467627] ? preempt_schedule_context (kernel/context_tracking.c:145)
[ 922.467627] ? ___preempt_schedule_context (arch/x86/lib/thunk_64.S:44)
[ 922.467627] ? preempt_schedule_context (kernel/context_tracking.c:145)
[ 922.467627] ? ___preempt_schedule_context (arch/x86/lib/thunk_64.S:44)
[ 922.467627] ? preempt_schedule_context (kernel/context_tracking.c:145)
[ 922.467627] ? ___preempt_schedule_context (arch/x86/lib/thunk_64.S:44)
[ 922.467627] ? preempt_schedule_context (kernel/context_tracking.c:145)
[ 922.467627] ? ___preempt_schedule_context (arch/x86/lib/thunk_64.S:44)
[ 922.467627] ? preempt_schedule_context (kernel/context_tracking.c:145)
[ 922.467627] ? ___preempt_schedule_context (arch/x86/lib/thunk_64.S:44)
[ 922.467627] ? preempt_schedule_context (kernel/context_tracking.c:145)
[ 922.467627] ? ___preempt_schedule_context (arch/x86/lib/thunk_64.S:44)
[ 922.467627] ? preempt_schedule_context (kernel/context_tracking.c:145)
[ 922.467627] ? ___preempt_schedule_context (arch/x86/lib/thunk_64.S:44)
[ 922.467627] ? preempt_schedule_context (kernel/context_tracking.c:145)
[ 922.467627] ? ___preempt_schedule_context (arch/x86/lib/thunk_64.S:44)
[ 922.467627] ? preempt_schedule_context (kernel/context_tracking.c:145)
[ 922.467627] ? ___preempt_schedule_context (arch/x86/lib/thunk_64.S:44)
[ 922.467627] ? preempt_schedule_context (kernel/context_tracking.c:145)
[ 922.467627] ? ___preempt_schedule_context (arch/x86/lib/thunk_64.S:44)
[ 922.467627] ? preempt_schedule_context (kernel/context_tracking.c:145)
[ 922.467627] ? ___preempt_schedule_context (arch/x86/lib/thunk_64.S:44)
[ 922.467627] ? preempt_schedule_context (kernel/context_tracking.c:145)
[ 922.467627] ? ___preempt_schedule_context (arch/x86/lib/thunk_64.S:44)
[ 922.467627] ? preempt_schedule_context (kernel/context_tracking.c:145)
[ 922.467627] ? ___preempt_schedule_context (arch/x86/lib/thunk_64.S:44)
[ 922.467627] ? preempt_schedule_context (kernel/context_tracking.c:145)
[ 922.467627] ? ___preempt_schedule_context (arch/x86/lib/thunk_64.S:44)
[ 922.467627] ? preempt_schedule_context (kernel/context_tracking.c:145)
[ 922.467627] ? ___preempt_schedule_context (arch/x86/lib/thunk_64.S:44)
[ 922.467627] ? preempt_schedule_context (kernel/context_tracking.c:145)
[ 922.467627] ? ___preempt_schedule_context (arch/x86/lib/thunk_64.S:44)
[ 922.467627] ? preempt_schedule_context (kernel/context_tracking.c:145)
[ 922.467627] ? ___preempt_schedule_context (arch/x86/lib/thunk_64.S:44)
[ 922.467627] ? preempt_schedule_context (kernel/context_tracking.c:145)
[ 922.467627] ? ___preempt_schedule_context (arch/x86/lib/thunk_64.S:44)
[ 922.467627] ? preempt_schedule_context (kernel/context_tracking.c:145)
[ 922.467627] ? ___preempt_schedule_context (arch/x86/lib/thunk_64.S:44)
[ 922.467627] ? preempt_schedule_context (kernel/context_tracking.c:145)
[ 922.467627] ? ___preempt_schedule_context (arch/x86/lib/thunk_64.S:44)
[ 922.467627] ? preempt_schedule_context (kernel/context_tracking.c:145)
[ 922.467627] ? ___preempt_schedule_context (arch/x86/lib/thunk_64.S:44)
[ 922.467627] ? preempt_schedule_context (kernel/context_tracking.c:145)
[ 922.467627] ? ___preempt_schedule_context (arch/x86/lib/thunk_64.S:44)
[ 922.467627] ? preempt_schedule_context (kernel/context_tracking.c:145)
[ 922.467627] ? ___preempt_schedule_context (arch/x86/lib/thunk_64.S:44)
[ 922.467627] ? preempt_schedule_context (kernel/context_tracking.c:145)
[ 922.467627] ? ___preempt_schedule_context (arch/x86/lib/thunk_64.S:44)
[ 922.467627] ? preempt_schedule_context (kernel/context_tracking.c:145)
[ 922.467627] ? ___preempt_schedule_context (arch/x86/lib/thunk_64.S:44)
[ 922.467627] ? preempt_schedule_context (kernel/context_tracking.c:145)
[ 922.467627] ? ___preempt_schedule_context (arch/x86/lib/thunk_64.S:44)
[ 922.467627] ? preempt_schedule_context (kernel/context_tracking.c:145)
[ 922.467627] ? ___preempt_schedule_context (arch/x86/lib/thunk_64.S:44)
[ 922.467627] ? preempt_schedule_context (kernel/context_tracking.c:145)
[ 922.467627] ? ___preempt_schedule_context (arch/x86/lib/thunk_64.S:44)
[ 922.467627] ? preempt_schedule_context (kernel/context_tracking.c:145)
[ 922.467627] ? ___preempt_schedule_context (arch/x86/lib/thunk_64.S:44)
[ 922.467627] ? preempt_schedule_context (kernel/context_tracking.c:145)
[ 922.467627] ? ___preempt_schedule_context (arch/x86/lib/thunk_64.S:44)
[ 922.467627] ? preempt_schedule_context (kernel/context_tracking.c:145)
[ 922.467627] ? ___preempt_schedule_context (arch/x86/lib/thunk_64.S:44)
[ 922.467627] ? preempt_schedule_context (kernel/context_tracking.c:145)
[ 922.467627] ? ___preempt_schedule_context (arch/x86/lib/thunk_64.S:44)
[ 922.467627] ? preempt_schedule_context (kernel/context_tracking.c:145)
[ 922.467627] ? ___preempt_schedule_context (arch/x86/lib/thunk_64.S:44)
[ 922.467627] ? preempt_schedule_context (kernel/context_tracking.c:145)
[ 922.467627] ? ___preempt_schedule_context (arch/x86/lib/thunk_64.S:44)
[ 922.467627] ? preempt_schedule_context (kernel/context_tracking.c:145)
[ 922.467627] ? ___preempt_schedule_context (arch/x86/lib/thunk_64.S:44)
[ 922.467627] ? preempt_schedule_context (kernel/context_tracking.c:145)
[ 922.467627] ? ___preempt_schedule_context (arch/x86/lib/thunk_64.S:44)
[ 922.467627] ? preempt_schedule_context (kernel/context_tracking.c:145)
[ 922.467627] ? ___preempt_schedule_context (arch/x86/lib/thunk_64.S:44)
[ 922.467627] ? preempt_schedule_context (kernel/context_tracking.c:145)
[ 922.467627] ? ___preempt_schedule_context (arch/x86/lib/thunk_64.S:44)
[ 922.467627] ? preempt_schedule_context (kernel/context_tracking.c:145)
[ 922.467627] ? ___preempt_schedule_context (arch/x86/lib/thunk_64.S:44)
[ 922.467627] ? preempt_schedule_context (kernel/context_tracking.c:145)
[ 922.467627] ? ___preempt_schedule_context (arch/x86/lib/thunk_64.S:44)
[ 922.467627] ? preempt_schedule_context (kernel/context_tracking.c:145)
[ 922.467627] ? ___preempt_schedule_context (arch/x86/lib/thunk_64.S:44)
[ 922.467627] ? preempt_schedule_context (kernel/context_tracking.c:145)
[ 922.467627] ? ___preempt_schedule_context (arch/x86/lib/thunk_64.S:44)
[ 922.467627] ? preempt_schedule_context (kernel/context_tracking.c:145)
[ 922.467627] ? ___preempt_schedule_context (arch/x86/lib/thunk_64.S:44)
[ 922.467627] ? preempt_schedule_context (kernel/context_tracking.c:145)
[ 922.467627] ? ___preempt_schedule_context (arch/x86/lib/thunk_64.S:44)
[ 922.467627] ? preempt_schedule_context (kernel/context_tracking.c:145)
[ 922.467627] ? ___preempt_schedule_context (arch/x86/lib/thunk_64.S:44)
[ 922.467627] ? preempt_schedule_context (kernel/context_tracking.c:145)
[ 922.467627] ? ___preempt_schedule_context (arch/x86/lib/thunk_64.S:44)
[ 922.467627] ? preempt_schedule_context (kernel/context_tracking.c:145)
[ 922.467627] ? ___preempt_schedule_context (arch/x86/lib/thunk_64.S:44)
[ 922.467627] ? preempt_schedule_context (kernel/context_tracking.c:145)
[ 922.467627] ? ___preempt_schedule_context (arch/x86/lib/thunk_64.S:44)
[ 922.467627] ? preempt_schedule_context (kernel/context_tracking.c:145)
[ 922.467627] ? ___preempt_schedule_context (arch/x86/lib/thunk_64.S:44)
[ 922.467627] ? preempt_schedule_context (kernel/context_tracking.c:145)
[ 922.467627] ? ___preempt_schedule_context (arch/x86/lib/thunk_64.S:44)
[ 922.467627] ? preempt_schedule_context (kernel/context_tracking.c:145)
[ 922.467627] ? ___preempt_schedule_context (arch/x86/lib/thunk_64.S:44)
[ 922.467627] ? preempt_schedule_context (kernel/context_tracking.c:145)
[ 922.467627] ? ___preempt_schedule_context (arch/x86/lib/thunk_64.S:44)
[ 922.467627] ? preempt_schedule_context (kernel/context_tracking.c:145)
[ 922.467627] ? ___preempt_schedule_context (arch/x86/lib/thunk_64.S:44)
[ 922.467627] ? preempt_schedule_context (kernel/context_tracking.c:145)
[ 922.467627] ? ___preempt_schedule_context (arch/x86/lib/thunk_64.S:44)
[ 922.467627] ? preempt_schedule_context (kernel/context_tracking.c:145)
[ 922.467627] ? ___preempt_schedule_context (arch/x86/lib/thunk_64.S:44)
[ 922.467627] ? preempt_schedule_context (kernel/context_tracking.c:145)
[ 922.467627] ? ___preempt_schedule_context (arch/x86/lib/thunk_64.S:44)
[ 922.467627] ? preempt_schedule_context (kernel/context_tracking.c:145)
[ 922.467627] ? ___preempt_schedule_context (arch/x86/lib/thunk_64.S:44)
[ 922.467627] ? preempt_schedule_context (kernel/context_tracking.c:145)
[ 922.467627] ? ___preempt_schedule_context (arch/x86/lib/thunk_64.S:44)
[ 922.467627] ? preempt_schedule_context (kernel/context_tracking.c:145)
[ 922.467627] ? ___preempt_schedule_context (arch/x86/lib/thunk_64.S:44)
[ 922.467627] ? preempt_schedule_context (kernel/context_tracking.c:145)
[ 922.467627] ? ___preempt_schedule_context (arch/x86/lib/thunk_64.S:44)
[ 922.467627] ? preempt_schedule_context (kernel/context_tracking.c:145)
[ 922.467627] ? ___preempt_schedule_context (arch/x86/lib/thunk_64.S:44)
[ 922.467627] ? preempt_schedule_context (kernel/context_tracking.c:145)
[ 922.467627] ? ___preempt_schedule_context (arch/x86/lib/thunk_64.S:44)
[ 922.467627] ? preempt_schedule_context (kernel/context_tracking.c:145)
[ 922.467627] ? ___preempt_schedule_context (arch/x86/lib/thunk_64.S:44)
[ 922.467627] ? preempt_schedule_context (kernel/context_tracking.c:145)
[ 922.467627] ? ___preempt_schedule_context (arch/x86/lib/thunk_64.S:44)
[ 922.467627] ? preempt_schedule_context (kernel/context_tracking.c:145)
[ 922.467627] ? ___preempt_schedule_context (arch/x86/lib/thunk_64.S:44)
[ 922.467627] ? preempt_schedule_context (kernel/context_tracking.c:145)
[ 922.467627] ? ___preempt_schedule_context (arch/x86/lib/thunk_64.S:44)
[ 922.467627] ? preempt_schedule_context (kernel/context_tracking.c:145)
[ 922.467627] ? ___preempt_schedule_context (arch/x86/lib/thunk_64.S:44)
[ 922.467627] ? preempt_schedule_context (kernel/context_tracking.c:145)
[ 922.467627] ? ___preempt_schedule_context (arch/x86/lib/thunk_64.S:44)
[ 922.467627] ? preempt_schedule_context (kernel/context_tracking.c:145)
[ 922.467627] ? ___preempt_schedule_context (arch/x86/lib/thunk_64.S:44)
[ 922.467627] ? preempt_schedule_context (kernel/context_tracking.c:145)
[ 922.467627] ? ___preempt_schedule_context (arch/x86/lib/thunk_64.S:44)
[ 922.467627] ? preempt_schedule_context (kernel/context_tracking.c:145)
[ 922.467627] ? ___preempt_schedule_context (arch/x86/lib/thunk_64.S:44)
[ 922.467627] ? preempt_schedule_context (kernel/context_tracking.c:145)
[ 922.467627] ? ___preempt_schedule_context (arch/x86/lib/thunk_64.S:44)
[ 922.467627] ? preempt_schedule_context (kernel/context_tracking.c:145)
[ 922.467627] ? ___preempt_schedule_context (arch/x86/lib/thunk_64.S:44)
[ 922.467627] ? preempt_schedule_context (kernel/context_tracking.c:145)
[ 922.467627] ? ___preempt_schedule_context (arch/x86/lib/thunk_64.S:44)
[ 922.467627] ? preempt_schedule_context (kernel/context_tracking.c:145)
[ 922.467627] ? ___preempt_schedule_context (arch/x86/lib/thunk_64.S:44)
[ 922.467627] ? preempt_schedule_context (kernel/context_tracking.c:145)
[ 922.467627] ? ___preempt_schedule_context (arch/x86/lib/thunk_64.S:44)
[ 922.467627] ? preempt_schedule_context (kernel/context_tracking.c:145)
[ 922.467627] ? ___preempt_schedule_context (arch/x86/lib/thunk_64.S:44)
[ 922.467627] ? preempt_schedule_context (kernel/context_tracking.c:145)
[ 922.467627] ? ___preempt_schedule_context (arch/x86/lib/thunk_64.S:44)
[ 922.467627] ? preempt_schedule_context (kernel/context_tracking.c:145)
[ 922.467627] ? ___preempt_schedule_context (arch/x86/lib/thunk_64.S:44)
[ 922.467627] ? preempt_schedule_context (kernel/context_tracking.c:145)
[ 922.467627] ? ___preempt_schedule_context (arch/x86/lib/thunk_64.S:44)
[ 922.467627] ? preempt_schedule_context (kernel/context_tracking.c:145)
[ 922.467627] ? ___preempt_schedule_context (arch/x86/lib/thunk_64.S:44)
[ 922.467627] ? preempt_schedule_context (kernel/context_tracking.c:145)
[ 922.467627] ? ___preempt_schedule_context (arch/x86/lib/thunk_64.S:44)
[ 922.467627] ? preempt_schedule_context (kernel/context_tracking.c:145)
[ 922.467627] ? ___preempt_schedule_context (arch/x86/lib/thunk_64.S:44)
[ 922.467627] ? preempt_schedule_context (kernel/context_tracking.c:145)
[ 922.467627] ? ___preempt_schedule_context (arch/x86/lib/thunk_64.S:44)
[ 922.467627] ? preempt_schedule_context (kernel/context_tracking.c:145)
[ 922.467627] ? ___preempt_schedule_context (arch/x86/lib/thunk_64.S:44)
[ 922.467627] ? preempt_schedule_context (kernel/context_tracking.c:145)
[ 922.467627] ? ___preempt_schedule_context (arch/x86/lib/thunk_64.S:44)
[ 922.467627] ? preempt_schedule_context (kernel/context_tracking.c:145)
[ 922.467627] ? ___preempt_schedule_context (arch/x86/lib/thunk_64.S:44)
[ 922.467627] ? preempt_schedule_context (kernel/context_tracking.c:145)
[ 922.467627] ? ___preempt_schedule_context (arch/x86/lib/thunk_64.S:44)
[ 922.467627] ? preempt_schedule_context (kernel/context_tracking.c:145)
[ 922.467627] ? ___preempt_schedule_context (arch/x86/lib/thunk_64.S:44)
[ 922.467627] ? preempt_schedule_context (kernel/context_tracking.c:145)
[ 922.467627] ? ___preempt_schedule_context (arch/x86/lib/thunk_64.S:44)
[ 922.467627] ? preempt_schedule_context (kernel/context_tracking.c:145)
[ 922.467627] ? ___preempt_schedule_context (arch/x86/lib/thunk_64.S:44)
[ 922.467627] ? preempt_schedule_context (kernel/context_tracking.c:145)
[ 922.467627] ? ___preempt_schedule_context (arch/x86/lib/thunk_64.S:44)
[ 922.467627] ? preempt_schedule_context (kernel/context_tracking.c:145)
[ 922.467627] ? ___preempt_schedule_context (arch/x86/lib/thunk_64.S:44)
[ 922.467627] ? preempt_schedule_context (kernel/context_tracking.c:145)
[ 922.467627] ? ___preempt_schedule_context (arch/x86/lib/thunk_64.S:44)
[ 922.467627] ? preempt_schedule_context (kernel/context_tracking.c:145)
[ 922.467627] ? ___preempt_schedule_context (arch/x86/lib/thunk_64.S:44)
[ 922.467627] ? preempt_schedule_context (kernel/context_tracking.c:145)
[ 922.467627] ? ___preempt_schedule_context (arch/x86/lib/thunk_64.S:44)
[ 922.467627] ? preempt_schedule_context (kernel/context_tracking.c:145)
[ 922.467627] ? ___preempt_schedule_context (arch/x86/lib/thunk_64.S:44)
[ 922.467627] ? preempt_schedule_context (kernel/context_tracking.c:145)
[ 922.467627] ? ___preempt_schedule_context (arch/x86/lib/thunk_64.S:44)
[ 922.467627] ? preempt_schedule_context (kernel/context_tracking.c:145)
[ 922.467627] ? __schedule (kernel/sched/core.c:2900)
[ 922.467627] ? ___preempt_schedule_context (arch/x86/lib/thunk_64.S:44)
[ 922.467627] ? ftrace_ops_control_func (kernel/trace/ftrace.c:4780)
[ 922.467627] ? ftrace_call (arch/x86/kernel/mcount_64.S:56)
[ 922.467627] ? retint_careful (arch/x86/kernel/entry_64.S:886)
[ 922.467627] ? __this_cpu_preempt_check (lib/smp_processor_id.c:63)
[ 922.467627] ? schedule_user (kernel/sched/core.c:2900)
[ 922.467627] ? schedule_user (kernel/sched/core.c:2900)
[ 922.467627] ? retint_careful (arch/x86/kernel/entry_64.S:889)
[ 922.467627] Code: 00 00 00 4d 8b b5 e8 18 00 00 e8 b5 55 02 00 85 c0 74 09 80 3d e4 1c e7 05 00 74 68 49 8b 56 60 48 63 cb 90 48 8b 82 e0 00 00 00 <48> 03 04 cd 00 df e4 97 4c 01 20 48 8b 52 48 48 85 d2 75 e5 e8
All code
========
0: 00 00 add %al,(%rax)
2: 00 4d 8b add %cl,-0x75(%rbp)
5: b5 e8 mov $0xe8,%ch
7: 18 00 sbb %al,(%rax)
9: 00 e8 add %ch,%al
b: b5 55 mov $0x55,%ch
d: 02 00 add (%rax),%al
f: 85 c0 test %eax,%eax
11: 74 09 je 0x1c
13: 80 3d e4 1c e7 05 00 cmpb $0x0,0x5e71ce4(%rip) # 0x5e71cfe
1a: 74 68 je 0x84
1c: 49 8b 56 60 mov 0x60(%r14),%rdx
20: 48 63 cb movslq %ebx,%rcx
23: 90 nop
24: 48 8b 82 e0 00 00 00 mov 0xe0(%rdx),%rax
2b:* 48 03 04 cd 00 df e4 add -0x681b2100(,%rcx,8),%rax <-- trapping instruction
32: 97
33: 4c 01 20 add %r12,(%rax)
36: 48 8b 52 48 mov 0x48(%rdx),%rdx
3a: 48 85 d2 test %rdx,%rdx
3d: 75 e5 jne 0x24
3f: e8 .byte 0xe8
...

Code starting with the faulting instruction
===========================================
0: 48 03 04 cd 00 df e4 add -0x681b2100(,%rcx,8),%rax
7: 97
8: 4c 01 20 add %r12,(%rax)
b: 48 8b 52 48 mov 0x48(%rdx),%rdx
f: 48 85 d2 test %rdx,%rdx
12: 75 e5 jne 0xfffffffffffffff9
14: e8 .byte 0xe8
...
[ 922.467627] RIP cpuacct_charge (kernel/sched/cpuacct.c:247)
[ 922.467627] RSP <ffff880850003d28>
[ 922.467627] CR2: fffffffc310ead68

Thanks,
Sasha
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