On Tue, 29 Jun 1999 01:46:02 +0200 (CEST), Andrea Arcangeli <andrea@suse.de> said:
> I think the filesystem and the page cache are different things and that it
> make tons of sense to have a threaded cache with a not scalable fs as
> having a threaded cache with a very slow HD.
> Usually when the fs is involved you always need to do some kind of
> read-I/O and so you are going to be slow and sleep anyway.
Yes, and of course it's much better even than that: for most cases,
the filesystem is only involved in the decision over where to find the
data on disk. Once we have done that lookup, the process of setting
up the cache and submitting the IO can be performed without any
interactions with the filesystem. The filesystem itself is just a
small part of the mechanism used to read and write data.
--Stephen
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