Messages in this thread |  | | Subject | Re: Locking comment on shrink_caches() | Date | Wed, 26 Sep 2001 17:40:15 +0100 (BST) | From | Alan Cox <> |
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> Ahh, that's a cpu bug -- one my athlons don't suffer from. > > Your Athlons may handle exclusive cache line acquisition more > efficiently (due to memory subsystem performance) but it still > does cost something.
On an exclusive line on Athlon a lock cycle is near enough free, its just an ordering constraint. Since the line is in E state no other bus master can hold a copy in cache so the atomicity is there. Ditto for newer Intel processors - 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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