Re: Locking comment on shrink_caches()

Alan Cox (alan@lxorguk.ukuu.org.uk)
Thu, 27 Sep 2001 13:10:49 +0100 (BST)

> Yes, this was my intended point. Please see my quoted text above and
> note the "exclusive cache line acquisition" with emphasis on the word
> "acquisition" meaning you don't have the cache line in E state yet.

See prefetching - the CPU prefetching will hide some of the effect and
the spin_lock_prefetch() macro does wonders for the rest.

Alan

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