Re: [PATCH] Caches that shrink automatically

From: Linus Torvalds (
Date: Sun Aug 04 2002 - 13:43:16 EST

On Sun, 4 Aug 2002, Andreas Gruenbacher wrote:
> Currently there is no way for modules to define dynamically sized caches that
> shrink upon memory pressure. We need this for implementing Extended Attribute
> caches on ext2, ext3, and ReiserFS. Other caches could also make use of the
> same mechanism (e.g., nfsd's permission cache, dcache, icache, dqache).

This is what the slablru patches should do.. Any slab user should be able
to get a callback when the LRU decides that the page seems to be unused.


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