On Mon, 21 Jan 2002, Hans Reiser wrote:
> Rik van Riel wrote:
> >If your ->writepage() writes pages to disk it just means
> >that reiserfs will be able to clean its pages faster than
> >the other filesystems.
>
> the logical extreme of this is that no write caching should be done at
> all, only read caching?
You know that's bad for write clustering ;)))
> >This means the VM will not call reiserfs ->writepage() as
> >often as for the other filesystems, since more of the
> >pages it finds will already be clean and freeable.
> >
> >I guess the only way to unbalance the caches is by actually
> >freeing pages in ->writepage, but I don't see any real reason
> >why you'd want to do that...
>
> It would unbalance the write cache, not the read cache.
Many workloads tend to read pages again after they've written
them, so throwing away pages immediately doesn't seem like a
good idea.
regards,
Rik
--
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This archive was generated by hypermail 2b29 : Wed Jan 23 2002 - 21:00:41 EST