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Date: Sun, 04 Aug 2002 22:31:07 +0400
From: Hans Reiser <reiser@namesys.com>
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To: Rik van Riel <riel@conectiva.com.br>
CC: Andreas Gruenbacher <agruen@suse.de>,
       Linus Torvalds <torvalds@transmeta.com>, Alan Cox <alan@redhat.com>,
       Marcelo Tosatti <marcelo@conectiva.com.br>,
       lkml <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH] Caches that shrink automatically
References: <Pine.LNX.4.44L.0208041055160.23404-100000@imladris.surriel.com>
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Rik van Riel wrote:

>On Sun, 4 Aug 2002, Andreas Gruenbacher wrote:
>  
>
>>On Sunday 04 August 2002 13:30, Hans Reiser wrote:
>>    
>>
>>>How do you ensure that caches have their (internal) aging hands pushed
>>>at a speed that is proportional to their memory usage, or is your design
>>>susceptible to all the usual complaints the unified memory manager crowd
>>>has about separate caches?
>>>      
>>>
>>That's a policy/optimization issue; it's not even desirable to shrink the
>>caches with priorities proportional to their size---they would all tend to
>>become equally large.
>>    
>>
>
>Nope, the idea is to push all caches according to size, but
>often-used caches should shrink less than caches that are
>hardly ever used.
>
Do you let the subcache decide how to move the aging hand and track it? 
 Have I convinced you of that one yet?  Or is it still page based?

-- 
Hans



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