Re: 2.1.111 is even more 'stuck on smp_invalidate_needed IPI wait'

Alan Cox (
Sat, 25 Jul 1998 17:41:28 +0100 (BST)

> 2.1.110 had only one 'stuck on smp_invalidate_needed IPI wait (CPU#12)'
> message right after freeing unused kernel memory. Had some occasions
> where I didn't get the message at all. 2.1.109 didn't have any problems
> I have been trying to fix this, but coudn't exactly figure out what
> exactly was going on.

It means someone broke the bootup sequence somehow. The message is caused
when one CPU tries to send a message to the other CPU's and they don't
respond in a sane time. The kernel punts the request and carries on. You
should be worried if you ever see any expect during a crash.


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