Messages in this thread |  | | From | Daniel Phillips <> | Subject | Re: [RFC] [PATCH] Include LRU in page count | Date | Mon, 2 Sep 2002 00:08:22 +0200 |
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On Monday 02 September 2002 00:09, Andrew Morton wrote: > Daniel Phillips wrote: > > > > ... > > I'm looking at your spinlock_irq now and thinking the _irq part could > > possibly be avoided. Can you please remind me of the motivation for this - > > was it originally intended to address the same race we've been working on > > here? > > > > scalability, mainly. If the CPU holding the lock takes an interrupt, > all the other CPUs get to spin until the handler completes. I measured > a 30% reducton in contention from this. > > Not a generally justifiable trick, but this is a heavily-used lock. > All the new games in refill_inactive() are there to minimise the > interrupt-off time.
Per-cpu lru lists? Your solution is a lot simpler...
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