Don Zickus wrote, on 30/04/11 12:02:
On Sat, Apr 30, 2011 at 07:06:54AM +0930, Arthur Marsh wrote:
Hi, I'd previously (2011-03-28) run into an issue with commit
f99a99330f85a84c346ddeb4adc72dbfad9b9e3e
kernel/watchdog.c: always return NOTIFY_OK during cpu up/down events

but wasn't sure that this commit was the cause of a problem or
simply revealing symptoms. I have since re-run a git-bisect and the
same commit was implicated.

On on old Pentium-II-266 machine with 440BX chipset I would get
numerous "BUG: soft lockup - CPU#0 stuck for 63s!" type errors in
dmesg with different applications being reported and even a command
like:

Does the problem go away if you boot with 'nmi_watchdog=0'?

Cheers,
Don



Yes, with plain 2.6.39-rc5-git2 I had problems with shutting down and with "BUG: soft lockup - CPU#0 stuck for 63s!" errors.

After adding 'nmi_watchdog=0' I could cleanly shutdown and have not seen any more "BUG: soft lockup - CPU#0 stuck for 63s!" errors.

Thanks for the suggestion.

Arthur.



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