Messages in this thread | | | Date | Sun, 20 Jan 2002 19:40:38 -0200 (BRST) | From | Rik van Riel <> | Subject | Re: Possible Idea with filesystem buffering. |
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On Mon, 21 Jan 2002, Hans Reiser wrote:
> >>and should otherwise check to see if the filesystem supports something > >>like pressure_fs_cache(), yes? > > > >That's incompatible with the concept of memory zones. > > Care to explain more?
On basically any machine we'll have multiple memory zones.
Each of those memory zones has its own free list and each of the zones can get low on free pages independantly of the other zones.
This means that if the VM asks to get a particular page freed, at the very minimum you need to make a page from the same zone freeable.
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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