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From: Nuno Silva <nuno.silva@vgertech.com>
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
Date: Mon, 20 Jan 2003 21:39:30 +0000	[thread overview]
Message-ID: <3E2C6C92.6060505@vgertech.com> (raw)
In-Reply-To: <004001c2c0bc$d1e69750$3640a8c0@boemboem>



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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  reply	other threads:[~2003-01-20 21:30 UTC|newest]

Thread overview: 7+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2003-01-19 17:05 Disabling file system caching Jean-Eric Cuendet
2003-01-20  1:05 ` Rik van Riel
2003-01-20 19:47   ` Folkert van Heusden
2003-01-20 21:39     ` Nuno Silva [this message]
  -- strict thread matches above, loose matches on Subject: below --
2003-01-20  7:47 Balbir
2003-01-20 14:21 ` Jan Hudec
2003-01-20 12:52 Martin Knoblauch

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