Re: [Bugme-new] [Bug 9398] New: BUG: soft lockup detected on CPU#0!

Chuck Ebbert
2007-11-19T21:31:53Z

On 11/16/2007 06:32 PM, Andrew Morton wrote:
> (switched to email. Please reply via emailed reply-to-all, not via the
> bugzilla web interface).
>
> On Fri, 16 Nov 2007 14:56:13 -0800 (PST)
> bugme-daemon@bugzilla.kernel.org wrote:
>
>> http://bugzilla.kernel.org/show_bug.cgi?id=9398
>>
>> Summary: BUG: soft lockup detected on CPU#0!
>> Product: Other
>> Version: 2.5
>> KernelVersion: 2.6.23.8
>> Platform: All
>> OS/Version: Linux
>> Tree: Mainline
>> Status: NEW
>> Severity: normal
>> Priority: P1
>> Component: Other
>> AssignedTo: other_other@kernel-bugs.osdl.org
>> ReportedBy: cijoml@volny.cz
>>
>>
>> Most recent kernel where this bug did not occur: 2.6.23.0
>
> Ow. Are you sure? This is a regression which was added into the 2.6.23
> stable tree?
>
>> Distribution: Debian stable
>> Hardware Environment: Pentium M laptop
>> Software Environment: Debian stable
>> Problem Description:
>>
>> Steps to reproduce:
>>
>> i2c-adapter i2c-5: SMBus Quick command not supported, can't probe for chips
>> i2c-adapter i2c-6: SMBus Quick command not supported, can't probe for chips
>> pcmcia: Detected deprecated PCMCIA ioctl usage from process: discover.
>> pcmcia: This interface will soon be removed from the kernel; please expect
>> breakage unless you upgrade to new tools.
>> pcmcia: see http://www.kernel.org/pub/linux/utils/kernel/pcmcia/pcmcia.html for
>> details.
>> eth0: link down
>> ieee80211_crypt: registered algorithm 'TKIP'
>> BUG: soft lockup detected on CPU#0!
>> [<c0140bf4>] softlockup_tick+0x90/0xaf
>> [<c0120a17>] update_process_times+0x32/0x54
>> [<c012edfd>] tick_periodic+0x6e/0x78
>> [<c012ee16>] tick_handle_periodic+0xf/0x5d
>> [<c0126390>] insert_work+0x59/0x5c
>> [<c012ef3c>] tick_do_broadcast+0x1f/0x3f
>> [<c012f05a>] tick_do_periodic_broadcast+0x1a/0x31
>> [<c012f08c>] tick_handle_periodic_broadcast+0x1b/0x5b
>> [<c01272fb>] __rcu_process_callbacks+0x112/0x170
>> [<c0106e83>] timer_interrupt+0x34/0x3d
>> [<c0140e66>] handle_IRQ_event+0x1a/0x3f
>> [<c01420df>] handle_level_irq+0x77/0xd0
>> [<c01061c5>] do_IRQ+0x75/0x8c
>> [<c0220d76>] acpi_hw_register_write+0x11b/0x14b
>> [<c0104713>] common_interrupt+0x23/0x28
>> [<c0110000>] mc_sysdev_remove+0x2b/0x4b
>> [<c0232ddf>] acpi_processor_idle+0x22f/0x398
>> [<c0102344>] cpu_idle+0x43/0x71
>> [<c03d29de>] start_kernel+0x250/0x255
>> [<c03d2317>] unknown_bootoption+0x0/0x195
>> =======================
>
> Looks like acpi_hw_register_write() has locked up. Or someone is
> continuously calling acpi_hw_register_write().
>
> I assume that the mc_sysdev_remove() in there is just stack garbage. To
> confirm this could you please set CONFIG_MICROCODE=n and retest?
>
> Also, it would be interesting to test whether we have introduced this bug
> into 2.6.24-rc2 (or -rc3, if it's out).
>

The softlockup detector was patched in 2.6.23.2; before that it was broken
for a few releases.

patch a115d5caca1a2905ba7a32b408a6042b20179aaa in mainline