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:
dmesg|tail -100
executed in a konsole window would cause the machine to be unresponsive
for a few minutes. System shutdown would also fail, requiring "init 0"
to be entered a second time.
This behaviour happened both with and without "lapic" on the kernel
command line, and with a kernel from Debian Experimental as documented
at: http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=624129
As this bisection took a couple of days I haven't tested the last few
snapshots at kernel.org but will do so later today.
I'm happy to test any new versions of patches to work around this issue.
Arthur.
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