Messages in this thread | | | Date | Wed, 30 Jul 2003 12:34:39 +0200 (CEST) | From | Ingo Molnar <> | Subject | Re: PATCH: Race in 2.6.0-test2 timer code |
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On Wed, 30 Jul 2003, Andrea Arcangeli wrote:
> I never did any 2.6 patch, so it maybe a different thing what you've > seen, not what I applied to 2.4. Infact even the 2.4 patch isn't from > me.
the 2.4 timer-scalability patches do have a problem: due to TIMER_BH the actual timer expiry can happen on a different CPU, which opens up a del_timer()/add_timer() race in the itimer code. Your patch closes that hole.
But on 2.6 the timer will run precisely on the CPU it was added, so i think the race is not possible.
Ingo
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