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

Kirill A. Shutemov
2011-09-25T14:19:41Z

On Sun, Sep 25, 2011 at 03:06:25PM +0200, Frederic Weisbecker wrote:
> On Sun, Sep 25, 2011 at 02:26:37PM +0300, Kirill A. Shutemov wrote:
> > On Sat, Sep 24, 2011 at 10:08:26PM -0700, Paul E. McKenney wrote:
> > > 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
> >
> > Yes. Thanks.
>
> I believe that doesn't really fix the issue. But the warning is not
> easy to trigger. You simply haven't hit it by chance after applying
> the patches.

Triggered a bit later:

[ 154.617416] ------------[ cut here ]------------
[ 154.617437] WARNING: at /home/kas/git/public/linux-next/kernel/rcutree.c:1833 rcu_needs_cpu+0xff/0x110()
[ 154.617444] Hardware name: HP EliteBook 8440p
[ 154.617449] Modules linked in: ip6table_filter ip6_tables ebtable_nat ebtables ipt_MASQUERADE iptable_nat nf_nat nf_conntrack_ipv4 nf_defrag_ipv4 xt_state nf_conntrack ipt_REJECT xt_CHECKSUM iptable_mangle xt_tcpudp iptable_filter ip_tables x_tables bridge stp llc acpi_cpufreq mperf rfcomm bnep cpufreq_powersave cpufreq_userspace cpufreq_conservative cpufreq_stats binfmt_misc fuse nfsd nfs lockd fscache auth_rpcgss nfs_acl sunrpc ext2 loop kvm_intel kvm i915 arc4 iwlagn mac80211 snd_hda_codec_hdmi snd_hda_codec_idt drm_kms_helper snd_hda_intel pcmcia drm snd_hda_codec uvcvideo snd_hwdep ecb snd_pcm videodev tpm_infineon btusb snd_seq media bluetooth v4l2_compat_ioctl32 cfg80211 snd_timer snd_seq_device yenta_socket evdev pcmcia_rsrc psmouse snd parport_pc pcmcia_core parport serio_raw hp_accel intel_ips rfkill i2c_algo_bit tpm_tis lis3lv02d i2c_core soundcore tpm container tpm_bios snd_page_alloc input_polldev video battery ac power_supply processor button ext4 mbcache jbd2 crc16 sha256_generic aesni_intel cryptd aes_x86_64 aes_generic cbc dm_crypt dm_mod sg sd_mod sr_mod cdrom crc_t10dif sdhci_pci sdhci mmc_core ahci libahci libata scsi_mod ehci_hcd e1000e usbcore thermal thermal_sys [last unloaded: scsi_wait_scan]
[ 154.617681] Pid: 0, comm: kworker/0:0 Not tainted 3.1.0-rc7-next-20110923+ #3
[ 154.617685] Call Trace:
[ 154.617688] <IRQ> [<ffffffff8104d72a>] warn_slowpath_common+0x7a/0xb0
[ 154.617704] [<ffffffff8104d775>] warn_slowpath_null+0x15/0x20
[ 154.617711] [<ffffffff810c00df>] rcu_needs_cpu+0xff/0x110
[ 154.617719] [<ffffffff81083855>] tick_nohz_stop_sched_tick.isra.9+0x105/0x3c0
[ 154.617726] [<ffffffff81083cae>] tick_nohz_irq_exit+0x2e/0x40
[ 154.617732] [<ffffffff81055620>] irq_exit+0xa0/0xd0
[ 154.617740] [<ffffffff8100412e>] do_IRQ+0x5e/0xd0
[ 154.617748] [<ffffffff81432ac0>] ? notifier_call_chain+0x70/0x70
[ 154.617756] [<ffffffff8142f66e>] common_interrupt+0x6e/0x6e
[ 154.617759] <EOI> [<ffffffff81297bbd>] ? acpi_hw_read+0x4a/0x51
[ 154.617772] [<ffffffff81087b07>] ? lock_acquire+0xa7/0x160
[ 154.617777] [<ffffffff81432ac0>] ? notifier_call_chain+0x70/0x70
[ 154.617784] [<ffffffff81432b16>] __atomic_notifier_call_chain+0x56/0xb0
[ 154.617789] [<ffffffff81432ac0>] ? notifier_call_chain+0x70/0x70
[ 154.617797] [<ffffffff8130ecb6>] ? cpuidle_idle_call+0x106/0x350
[ 154.617803] [<ffffffff81432b81>] atomic_notifier_call_chain+0x11/0x20
[ 154.617809] [<ffffffff81001233>] cpu_idle+0xe3/0x120
[ 154.617818] [<ffffffff8141e44b>] start_secondary+0x1fd/0x204
[ 154.617823] ---[ end trace 64c64a258e1aa463 ]---

--
Kirill A. Shutemov