2.4.17-pre[12]-ben0 trees hang on unsuspend

[Benjamin Herrenschmidt]

>> >after a few days of frequent use, i can say that sleep/wakeup
>> >bahaviour has improved vastly.
>> >however there was again one hard lockup yesterday.
>> >i was on the road when it hit, so i haven't been able to ping or ssh
>> >into the machine.
>> >i think it only happens when you strike a key immediately after
>> >sleep, before the standby led starts glowing.
>>
>> Ok, I'll do some experiments and see if I can find something.
>
>let me know if can test something for you.
>is there any bulletproof method to capture kernel messages on a
>pismo when it goes bang ?
>has somebody used the modem port as a serial console ? i have a
>spare modem lying around, perhaps it might be worth trying...

xmon_printf (on screen) is usually a working properly if you add
your own messages, but if you are debugging sleep, you may have to
disable display sleep to see the messages.

Ben.


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