Messages in this thread |  | | | Date | Fri, 03 Jul 2009 18:55:53 -0700 (PDT) | | Subject | Re: Soft-Lockup/Race in networking in 2.6.31-rc1+195 ( possibly?caused by netem) | | From | David Miller <> |
From: Jarek Poplawski <jarkao2@gmail.com> Date: Sat, 4 Jul 2009 00:56:40 +0200
> On Fri, Jul 03, 2009 at 01:22:20PM -0700, David Miller wrote: >> Well, if you look at that commit the bisect pointed to Jarek, it is a >> change which starts causing a situation which never happened before. >> Namely, timers added on one cpu can be migrated and fire on another. >> >> So this could be exposing races in the networking that technically >> always existed. > > I'm not sure I get your point; could you give some example? > Actually, I've suspected races in timers code.
Let's say that a particular networking timer always gets re-added on the cpu where the timer fires.
In that case, beforehand, no inter-cpu races could possibly be tested. But with the new timer code, such races could now be potentially triggered.
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