On Wed, 21 May 2014, Vladimir Davydov wrote: > Seems I've found a better way to avoid this race, which does not involve > messing up free hot paths. The idea is to explicitly zap each per-cpu > partial list by setting it pointing to an invalid ptr. Since > put_cpu_partial(), which is called from __slab_free(), uses atomic > cmpxchg for adding a new partial slab to a per cpu partial list, it is > enough to add a check if partials are zapped there and bail out if so. > > The patch doing the trick is attached. Could you please take a look at > it once time permit?
Well if you set s->cpu_partial = 0 then the slab should not be added to the partial lists. Ok its put on there temporarily but then immediately moved to the node partial list in put_cpu_partial(). -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
