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Date: Tue, 15 Sep 2009 11:27:28 -0700
From: Andrew Morton <akpm@linux-foundation.org>
To: Suresh Jayaram <sureshjayaram@gmail.com>
Cc: David Rientjes <rientjes@google.com>, linux-kernel@vger.kernel.org,
       Thomas Gleixner <tglx@linutronix.de>, Ingo Molnar <mingo@elte.hu>,
       Jin Dongming <jin.dongming@np.css.fujitsu.com>,
       Dmitry Torokhov <dmitry.torokhov@gmail.com>,
       Rusty Russell <rusty@rustcorp.com.au>, Greg KH <greg@kroah.com>,
       Jesse Barnes <jbarnes@virtuousgeek.org>
Subject: Re: mmotm 2009-09-09-22-56 uploaded
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On Tue, 15 Sep 2009 15:43:35 +0530 Suresh Jayaram <sureshjayaram@gmail.com> wrote:
>

Please don't wordwrap the emails - it makes a horrid mess of oops traces.

> 
> I applied both the fixes and it fixes the hardlock problem. However there is
> still oopses left that I see during booting, nevertheless booting succeeds.
> 
>
> 
> Sep 15 15:29:36 jay-t60p kernel: BUG: unable to handle kernel NULL pointer dereference at (null)
> Sep 15 15:29:36 jay-t60p kernel: IP: [<ffffffff81178954>] bitmap_scnprintf+0x5a/0xae
> Sep 15 15:29:36 jay-t60p kernel: PGD 0
> Sep 15 15:29:36 jay-t60p kernel: Oops: 0000 [#1] SMP
> Sep 15 15:29:36 jay-t60p kernel: last sysfs file: /sys/devices/pci0000:00/0000:00:01.0/local_cpus
> Sep 15 15:29:36 jay-t60p kernel: CPU 1
> Sep 15 15:29:36 jay-t60p kernel: Modules linked in: bnep sco nfsd exportfs rfcomm l2cap crc16 snd_pcm_oss snd_mixer_oss snd_seq binfmt_misc snd_seq_device nfs lockd nfs_acl auth_rpcgss sunrpc ipv6 cpufreq_conservative cpufreq_userspace cpufreq_powersave acpi_cpufreq ipt_MASQUERADE iptable_nat nf_nat nf_conntrack_ipv4 nf_conntrack nf_defrag_ipv4 ip_tables x_tables bridge stp tun fuse loop dm_mod snd_hda_codec_analog snd_hda_intel snd_hda_codec snd_hwdep rtc_cmos pcmcia btusb snd_pcm snd_timer snd ppdev thinkpad_acpi rtc_core i2c_i801 yenta_socket iTCO_wdt nsc_ircc usbhid ide_cd_mod video rsrc_nonstatic pl2303 bluetooth hid soundcore parport_pc led_class output rtc_lib ac battery button intel_agp i2c_core pcmcia_core pcspkr usbserial iTCO_vendor_support irda e1000e cdrom snd_page_alloc parport sg rfkill joydev uinput crc_ccitt uhci_hcd ehci_hcd sd_mod crc_t10dif usbcore edd ext3 mbcache jbd fan ide_pci_generic ata_generic ata_piix pata_acpi ahci libata scsi_mod piix ide_core!
  thermal processor thermal_sys hwmon
> Sep 15 15:29:36 jay-t60p kernel: Pid: 2478, comm: irqbalance Not tainted 2.6.31-rc9-mm1-0.1-default #7 20088JQ
> Sep 15 15:29:36 jay-t60p kernel: RIP: 0010:[<ffffffff81178954>]__ [<ffffffff81178954>] bitmap_scnprintf+0x5a/0xae
> Sep 15 15:29:36 jay-t60p kernel: RSP: 0018:ffff880037a81e38__ EFLAGS: 00010246
> Sep 15 15:29:36 jay-t60p kernel: RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
> Sep 15 15:29:36 jay-t60p kernel: RDX: 0000000000000002 RSI: 0000000000000ffe RDI: 0000000000000000
> Sep 15 15:29:36 jay-t60p kernel: RBP: ffff880037a81e68 R08: 0000000000000005 R09: 0000000000000001
> Sep 15 15:29:36 jay-t60p kernel: R10: ffffffff813c1cd3 R11: 0000000000000001 R12: 0000000000000000
> Sep 15 15:29:36 jay-t60p kernel: R13: 0000000000000000 R14: 0000000000000ffe R15: ffff88007bbe3000
> Sep 15 15:29:36 jay-t60p kernel: FS:__ 00007f605bee46f0(0000) GS:ffff880005f00000(0000) knlGS:0000000000000000
> Sep 15 15:29:36 jay-t60p kernel: CS:__ 0010 DS: 0000 ES: 0000 CR0: 000000008005003b
> Sep 15 15:29:36 jay-t60p kernel: CR2: 0000000000000000 CR3: 000000007acf8000 CR4: 00000000000006e0
> Sep 15 15:29:36 jay-t60p kernel: DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
> Sep 15 15:29:36 jay-t60p kernel: DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
> Sep 15 15:29:36 jay-t60p kernel: Process irqbalance (pid: 2478, threadinfo ffff880037a80000, task ffff8800376d8280)
> Sep 15 15:29:37 jay-t60p rpc.statd[2588]: statd running as root. chown /var/lib/nfs/sm to choose different user
> Sep 15 15:29:37 jay-t60p sm-notify[2596]: Already notifying clients; Exiting!
> Sep 15 15:29:36 jay-t60p modem-manager: Loaded plugin MBM
> Sep 15 15:29:36 jay-t60p kernel: Stack:
> Sep 15 15:29:37 jay-t60p kernel:__ ffffffff8152b7d0 ffff88007bbe3000 ffffffff8154a6a8 ffff88007c7aa2d8
> Sep 15 15:29:37 jay-t60p kernel: <0> ffffffff81556620 ffff880037a81f48 ffff880037a81e88 ffffffff81186937
> Sep 15 15:29:37 jay-t60p kernel: <0> ffff88007c7aa2d8 fffffffffffffffb ffff880037a81ea8 ffffffff811fbff6
> Sep 15 15:29:37 jay-t60p kernel: Call Trace:
> Sep 15 15:29:37 jay-t60p kernel:__ [<ffffffff81186937>] local_cpus_show+0x36/0x49
> Sep 15 15:29:37 jay-t60p kernel:__ [<ffffffff811fbff6>] dev_attr_show+0x20/0x44
> Sep 15 15:29:37 jay-t60p kernel:__ [<ffffffff81121741>] sysfs_read_file+0xb2/0x131
> Sep 15 15:29:37 jay-t60p kernel:__ [<ffffffff810ce07c>] vfs_read+0xb1/0x187
> Sep 15 15:29:37 jay-t60p kernel:__ [<ffffffff810ce216>] sys_read+0x47/0x70
> Sep 15 15:29:37 jay-t60p modem-manager: Loaded plugin Sierra
> Sep 15 15:29:37 jay-t60p kernel:__ [<ffffffff8100b9eb>] system_call_fastpath+0x16/0x1b
> Sep 15 15:29:37 jay-t60p kernel: Code: c1 1f 31 db 83 e1 e0 44 8d 61 e0 eb 5e 44 89 e0 44 89 e1 41 b9 01 00 00 00 c1 f8 06 83 e1 3f 44 8d 42 03 48 98 48 63 fb 44 89 f6 <49> 8b 44 c5 00 49 8d 3c 3f 29 de 41 c1 f8 02 41 83 ec 20 48 d3
> Sep 15 15:29:37 jay-t60p kernel: RIP__ [<ffffffff81178954>] bitmap_scnprintf+0x5a/0xae
> Sep 15 15:29:37 jay-t60p kernel:__ RSP <ffff880037a81e38>
> Sep 15 15:29:37 jay-t60p kernel: CR2: 0000000000000000
> Sep 15 15:29:37 jay-t60p kernel: ---[ end trace 57e387226b9f2380 ]---


It oopsed in local_cpus_show()->bitmap_scnprintf().  I don't think
anyone has mucked with that lately?

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