Re: [patch] SMP races in the timer code, timer-fix-2.6.0-test7-A0

[Manfred Spraul]

Ingo wrote:

> fixing this second race is hard - it involves a heavy race-check operation
> that has to lock all bases, and has to re-check the base->running_timer
> value, and timer_pending condition atomically.
>  
What about moving the "timer running" information into the timer_list, 
instead of keeping it in the base?
For example base=0 means neither running nor pending. base=1 means 
running, but not pending, and pointers mean pending on the given base.

This would allow an atomic test without the brute force locking.

--   
    Manfred


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