On Wed, 15 Aug 2007, Andi Kleen wrote: > > > The interrupt handler shouldn't touch zone_flag. If it wants > > > to it would need to be converted to a local_t and incremented/decremented > > > (should be about the same cost at least on architectures with sane > > > local_t implementation) > > > > That would mean we need to fork the code for reclaim? > > Not with the local_t increment.
Ok I have a vague idea on how this could but its likely that the changes make things worse rather than better. Additional reference to a new cacheline (per cpu but still), preempt disable. Lots of code at all call sites. Interrupt enable/disable is quite efficient in recent processors. - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
