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SubjectRe: Disabling file system caching


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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