On Sat, 28 Nov 1998 14:44:06 +0100 (MET), R.E.Wolff@BitWizard.nl (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
writes.
--Stephen
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