Messages in this thread | | | Date | Mon, 26 Jul 2004 21:01:34 -0500 | From | Dimitri Sivanich <> | Subject | Re: [PATCH] Locking optimization for cache_reap |
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On Mon, Jul 26, 2004 at 08:47:57PM -0500, Dimitri Sivanich wrote: > > While you've got irq's disabled, drain_array() (the function my patch removes) > acquires the cache spin_lock, then releases it. Cache_reap then acquires > it again (with irq's having been off the entire time). My testing has found > that simply acquiring the lock once while irq's are off results in fewer > excessively long latencies. > > Results probably vary somewhat depending on the circumstance.
Of course, I should add that all of this is from the perspective of the cpu doing the cache_reap. If others feel that this may add too much latency to other paths, other solutions may be in order. - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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