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Date: Mon, 20 Jan 2003 21:39:30 +0000
From: Nuno Silva <nuno.silva@vgertech.com>
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To: Folkert van Heusden <folkert@vanheusden.com>
CC: "'Rik van Riel'" <riel@conectiva.com.br>,
       "'Jean-Eric Cuendet'" <jean-eric.cuendet@linkvest.com>,
       linux-kernel@vger.kernel.org
Subject: Re: Disabling file system caching
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Folkert van Heusden wrote:
>>>Is it possible to disable file caching for a given partition or mount?
>>
>>No, if you do that mmap(), read(), write() etc. would be impossible.
> 
> 
> Hmmm, maybe there's some way to explicitly flush the read/write-cache?
> Ok, sync will do nice for the write-cache, but for the read-one?

AFAIK, you simply can't... I'm trying to do this for several months and 
no luck. Linux simply caches everything it can in the read-cache. For 
99% of all cases this is very good but, for some situations, this is not 
desireable.

For the write cache, you can minimize memory usage playing with 
/proc/sys/vm (see Documentation/filesystems/proc.txt).

Regards,
Nuno Silva

> 
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