Messages in this thread | | | Date | Tue, 22 Jan 2002 21:34:56 -0200 (BRST) | From | Rik van Riel <> | Subject | Re: Possible Idea with filesystem buffering. |
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On Wed, 23 Jan 2002, Hans Reiser wrote:
> Let's try a non-reiserfs sub-cache example. Suppose you have a cache > of objects that are smaller than a page.
> Suppose that there is absolutely no correlation in access between the > objects that are on the same page. Suppose that this subcache has > methods for freeing however many of them it wants to free, and it can > squeeze them together into fewer pages whenever it wants to.
In this case I absolutely agree with you.
In this case it is also _possible_ because all access to these data structures goes through the filesystem code, so the filesystem knows exactly which object is a candidate for freeing and which isn't.
I think the last messages from the thread were a miscommunication between us -- I was under the impression that you wanted per-filesystem freeing decisions for things like page cache pages.
kind regards,
Rik -- "Linux holds advantages over the single-vendor commercial OS" -- Microsoft's "Competing with Linux" document
http://www.surriel.com/ http://distro.conectiva.com/
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