Messages in this thread | | | Date | Tue, 17 Jan 2006 09:17:49 +0100 | From | Ingo Molnar <> | Subject | Re: 2.6.15-mm4 failure on power5 |
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* Andrew Morton <akpm@osdl.org> wrote:
> > If I revert just that patch, mm4 boots fine. Its really not obvious to > > me at all why that patch is breaking things though... > > Yes, that is strange. I do recall that if something accidentally > enables interrupts too early in boot, ppc64 machines tend to go > comatose. But if we'd been running that code under > local_irq_disable(), down() would have spat a warning.
perhaps it was just luck it worked so far, and the bug could have had worse incarnations that the current clear hang if a certain generic codepath is touched in a perfectly valid way. Does CONFIG_DEBUG_MUTEXES (or any of the other debugging options) make any noise?
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