linux-kernel - Re: linux-next-20110923: warning kernel/rcutree.c:1833

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Date:	Sat, 24 Sep 2011 22:08:26 -0700
From:	"Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>
To:	"Kirill A. Shutemov" <kirill@...temov.name>
Cc:	linux-kernel@...r.kernel.org,
	Frederic Weisbecker <fweisbec@...il.com>,
	Dipankar Sarma <dipankar@...ibm.com>,
	Thomas Gleixner <tglx@...utronix.de>,
	Ingo Molnar <mingo@...e.hu>,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	Lai Jiangshan <laijs@...fujitsu.com>
Subject: Re: linux-next-20110923: warning kernel/rcutree.c:1833

On Sun, Sep 25, 2011 at 03:24:09AM +0300, Kirill A. Shutemov wrote:
> [   29.974288] ------------[ cut here ]------------
> [   29.974308] WARNING: at /home/kas/git/public/linux-next/kernel/rcutree.c:1833 rcu_needs_cpu+0xff
> [   29.974316] Hardware name: HP EliteBook 8440p
> [   29.974321] Modules linked in: ip6table_filter ip6_tables ebtable_nat ebtables ipt_MASQUERADE iple_mangle xt_tcpudp iptable_filter ip_tables x_tables bridge stp llc rfcomm bnep acpi_cpufreq mperfckd fscache auth_rpcgss nfs_acl sunrpc ext2 loop kvm_intel kvm snd_hda_codec_hdmi snd_hda_codec_idtideodev media v4l2_compat_ioctl32 snd_seq bluetooth drm_kms_helper snd_timer tpm_infineon snd_seq_drt tpm_tis hp_accel intel_ips soundcore lis3lv02d tpm rfkill i2c_algo_bit snd_page_alloc i2c_core c16 sha256_generic aesni_intel cryptd aes_x86_64 aes_generic cbc dm_crypt dm_mod sg sr_mod sd_mod cd thermal_sys [last unloaded: scsi_wait_scan]
> [   29.974517] Pid: 0, comm: kworker/0:1 Not tainted 3.1.0-rc7-next-20110923 #2
> [   29.974521] Call Trace:
> [   29.974525]  <IRQ>  [<ffffffff8104d72a>] warn_slowpath_common+0x7a/0xb0
> [   29.974540]  [<ffffffff8104d775>] warn_slowpath_null+0x15/0x20
> [   29.974546]  [<ffffffff810bffdf>] rcu_needs_cpu+0xff/0x110
> [   29.974555]  [<ffffffff8108396f>] tick_nohz_stop_sched_tick+0x13f/0x3d0
> [   29.974563]  [<ffffffff814329c0>] ? notifier_call_chain+0x70/0x70
> [   29.974571]  [<ffffffff81055622>] irq_exit+0xa2/0xd0
> [   29.974578]  [<ffffffff8101ee75>] smp_apic_timer_interrupt+0x85/0x1c0
> [   29.974585]  [<ffffffff814329c0>] ? notifier_call_chain+0x70/0x70
> [   29.974592]  [<ffffffff81436e1e>] apic_timer_interrupt+0x6e/0x80
> [   29.974596]  <EOI>  [<ffffffff81297abd>] ? acpi_hw_read+0x4a/0x51
> [   29.974609]  [<ffffffff81087a07>] ? lock_acquire+0xa7/0x160
> [   29.974615]  [<ffffffff814329c0>] ? notifier_call_chain+0x70/0x70
> [   29.974622]  [<ffffffff81432a16>] __atomic_notifier_call_chain+0x56/0xb0
> [   29.974631]  [<ffffffff814329c0>] ? notifier_call_chain+0x70/0x70
> [   29.974642]  [<ffffffff8130ebb6>] ? cpuidle_idle_call+0x106/0x350
> [   29.974651]  [<ffffffff81432a81>] atomic_notifier_call_chain+0x11/0x20
> [   29.974661]  [<ffffffff81001233>] cpu_idle+0xe3/0x120
> [   29.974672]  [<ffffffff8141e34b>] start_secondary+0x1fd/0x204
> [   29.974681] ---[ end trace 6c1d44095a3bb7c5 ]---

Do the following help?

	https://lkml.org/lkml/2011/9/17/47
	https://lkml.org/lkml/2011/9/17/45
	https://lkml.org/lkml/2011/9/17/43

							Thanx, Paul
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