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SubjectRe: [2.1.130-3] Page cache DEFINATELY too persistant... feature?

On Sat, 28 Nov 1998 14:44:06 +0100 (MET), (Rogier
Wolff) said:

> I'm not sure that this is possible. We will need to "throttle at the
> source" eventually. I can write an application that writes a file at
> 50Mb per second (try "dd if=/dev/zero of=testfile"), and the disk is
> never going to keep up with that.

We do. The buffer cache grows with the low GFP_BUFFER priority, and
even then grows only if the cache is within a certain limit and we have
enough free space. Exhaust those limits and it starts recycling
existing buffers, which is a natural at-source throttle for buffer


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