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Message-ID: <4F346111.1040506@gmail.com>
Date:	Thu, 09 Feb 2012 17:13:05 -0700
From:	David Ahern <dsahern@...il.com>
To:	Linus Torvalds <torvalds@...ux-foundation.org>
CC:	Ingo Molnar <mingo@...e.hu>,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	Arnaldo Carvalho de Melo <acme@...stprotocols.net>,
	Thomas Gleixner <tglx@...utronix.de>,
	"H. Peter Anvin" <hpa@...or.com>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	x86@...nel.org
Subject: Re: Hmm.. WARN_ON_ONCE(cpuc->enabled)



On 02/09/2012 04:46 PM, Linus Torvalds wrote:
> Ok, so I get the appended on my Core i5 when I did a "perf record -f
> -e cycles:pp make -j" on the kernel build.
> 
> What's up, guys? I haven't tried that particular perf run in a while,
> so it might have been going on for quite some time.

Perhaps already fixed by
https://lkml.org/lkml/2012/2/4/42

It's not in your tree; but in tip/urgent.

David

> 
>                              Linus
> 
> ---
> 
>  WARNING: at arch/x86/kernel/cpu/perf_event_intel_ds.c:442
> intel_pmu_pebs_enable+0x89/0xa0()
>  Hardware name: System Product Name
>  Pid: 12994, comm: perf Not tainted 3.3.0-rc3-00001-g690d137f448d #34
>  Call Trace:
>   <IRQ>  [<ffffffff8102f205>] warn_slowpath_common+0x75/0xb0
>   [<ffffffff8105c1d4>] ? load_balance+0xc4/0x860
>   [<ffffffff8102f305>] warn_slowpath_null+0x15/0x20
>   [<ffffffff81013f59>] intel_pmu_pebs_enable+0x89/0xa0
>   [<ffffffff81014614>] intel_pmu_enable_event+0xf4/0x190
>   [<ffffffff81010f33>] x86_pmu_start+0x83/0x110
>   [<ffffffff81098336>] perf_adjust_freq_unthr_context+0x106/0x170
>   [<ffffffff810985a0>] perf_event_task_tick+0x200/0x2c0
>   [<ffffffff8106a5d0>] ? tick_nohz_handler+0xf0/0xf0
>   [<ffffffff81055856>] scheduler_tick+0xc6/0x100
>   [<ffffffff8103b649>] update_process_times+0x69/0x80
>   [<ffffffff8106a62f>] tick_sched_timer+0x5f/0xb0
>   [<ffffffff8104dcd5>] __run_hrtimer.clone.31+0x55/0x110
>   [<ffffffff8104e6ff>] hrtimer_interrupt+0xdf/0x210
>   [<ffffffff8101c744>] smp_apic_timer_interrupt+0x64/0xa0
>   [<ffffffff816a264b>] apic_timer_interrupt+0x6b/0x70
>   <EOI>  [<ffffffff8109d8df>] ? find_get_page+0x6f/0xc0
>   [<ffffffff8128c114>] ? avtab_search_node+0x74/0x90
>   [<ffffffff810a8b23>] ? mark_page_accessed+0x43/0x50
>   [<ffffffff8129744d>] cond_compute_av+0x2d/0xd0
>   [<ffffffff81293922>] context_struct_compute_av+0x1f2/0x420
>   [<ffffffff8110834f>] ? __getblk+0x1f/0x280
>   [<ffffffff81294265>] security_compute_av+0xf5/0x2c0
>   [<ffffffff8127eeec>] avc_has_perm_noaudit+0xfc/0x3a0
>   [<ffffffff811058ec>] ? ll_rw_block+0x2c/0xb0
>   [<ffffffff8127f1d6>] avc_has_perm_flags+0x46/0xa0
>   [<ffffffff81284801>] inode_has_perm.clone.39+0x21/0x30
>   [<ffffffff8128525a>] selinux_inode_permission+0xaa/0x100
>   [<ffffffff8127cc97>] security_inode_permission+0x17/0x20
>   [<ffffffff810e4280>] inode_permission+0x40/0xd0
>   [<ffffffff810e566f>] link_path_walk+0x6f/0x8f0
>   [<ffffffff810e7807>] path_openat+0xb7/0x430
>   [<ffffffff810e7bc4>] do_filp_open+0x44/0xa0
>   [<ffffffff810b15ee>] ? kmemdup+0x3e/0x50
>   [<ffffffff8128245a>] ? selinux_cred_prepare+0x1a/0x40
>   [<ffffffff810df7dd>] open_exec+0x2d/0xf0
>   [<ffffffff810e08d1>] do_execve_common.clone.36+0x1f1/0x430
>   [<ffffffff810e0b26>] do_execve+0x16/0x20
>   [<ffffffff8100aba5>] sys_execve+0x45/0x70
>   [<ffffffff816a1fec>] stub_execve+0x6c/0xc0
>  ---[ end trace 55816fcc72df1997 ]---
>  ------------[ cut here ]------------
>  WARNING: at arch/x86/kernel/cpu/perf_event_intel_lbr.c:75
> intel_pmu_lbr_enable+0x92/0xa0()
>  Hardware name: System Product Name
>  Pid: 12994, comm: perf Tainted: G        W    3.3.0-rc3-00001-g690d137f448d #34
>  Call Trace:
>   <IRQ>  [<ffffffff8102f205>] warn_slowpath_common+0x75/0xb0
>   [<ffffffff8102f305>] warn_slowpath_null+0x15/0x20
>   [<ffffffff81012e32>] intel_pmu_lbr_enable+0x92/0xa0
>   [<ffffffff81013f38>] intel_pmu_pebs_enable+0x68/0xa0
>   [<ffffffff81014614>] intel_pmu_enable_event+0xf4/0x190
>   [<ffffffff81010f33>] x86_pmu_start+0x83/0x110
>   [<ffffffff81098336>] perf_adjust_freq_unthr_context+0x106/0x170
>   [<ffffffff810985a0>] perf_event_task_tick+0x200/0x2c0
>   [<ffffffff8106a5d0>] ? tick_nohz_handler+0xf0/0xf0
>   [<ffffffff81055856>] scheduler_tick+0xc6/0x100
>   [<ffffffff8103b649>] update_process_times+0x69/0x80
>   [<ffffffff8106a62f>] tick_sched_timer+0x5f/0xb0
>   [<ffffffff8104dcd5>] __run_hrtimer.clone.31+0x55/0x110
>   [<ffffffff8104e6ff>] hrtimer_interrupt+0xdf/0x210
>   [<ffffffff8101c744>] smp_apic_timer_interrupt+0x64/0xa0
>   [<ffffffff816a264b>] apic_timer_interrupt+0x6b/0x70
>   <EOI>  [<ffffffff8109d8df>] ? find_get_page+0x6f/0xc0
>   [<ffffffff8128c114>] ? avtab_search_node+0x74/0x90
>   [<ffffffff810a8b23>] ? mark_page_accessed+0x43/0x50
>   [<ffffffff8129744d>] cond_compute_av+0x2d/0xd0
>   [<ffffffff81293922>] context_struct_compute_av+0x1f2/0x420
>   [<ffffffff8110834f>] ? __getblk+0x1f/0x280
>   [<ffffffff81294265>] security_compute_av+0xf5/0x2c0
>   [<ffffffff8127eeec>] avc_has_perm_noaudit+0xfc/0x3a0
>   [<ffffffff811058ec>] ? ll_rw_block+0x2c/0xb0
>   [<ffffffff8127f1d6>] avc_has_perm_flags+0x46/0xa0
>   [<ffffffff81284801>] inode_has_perm.clone.39+0x21/0x30
>   [<ffffffff8128525a>] selinux_inode_permission+0xaa/0x100
>   [<ffffffff8127cc97>] security_inode_permission+0x17/0x20
>   [<ffffffff810e4280>] inode_permission+0x40/0xd0
>   [<ffffffff810e566f>] link_path_walk+0x6f/0x8f0
>   [<ffffffff810e7807>] path_openat+0xb7/0x430
>   [<ffffffff810e7bc4>] do_filp_open+0x44/0xa0
>   [<ffffffff810b15ee>] ? kmemdup+0x3e/0x50
>   [<ffffffff8128245a>] ? selinux_cred_prepare+0x1a/0x40
>   [<ffffffff810df7dd>] open_exec+0x2d/0xf0
>   [<ffffffff810e08d1>] do_execve_common.clone.36+0x1f1/0x430
>   [<ffffffff810e0b26>] do_execve+0x16/0x20
>   [<ffffffff8100aba5>] sys_execve+0x45/0x70
>   [<ffffffff816a1fec>] stub_execve+0x6c/0xc0
>  ---[ end trace 55816fcc72df1998 ]---
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