Re: Subtle MM bug

[Linus Torvalds <torvalds@transmeta.com>]

On Tue, 9 Jan 2001, Marcelo Tosatti wrote:
> 
> > > The second problem is that background scanning is being done
> > > unconditionally, and it should not. You end up getting all pages with the
> > > same age if the system is idle. Look at this example (2.4.1-pre1):
> > 
> > I agree. However, I think that we do want to do some background scanning
> > to push out dirty pages in the background, kind of like bdflush. It just
> > shouldn't age the pages (and thus not move them to the inactive list).
> 
> Actually it must age the pages, but aging should not be unconditional. 

No, I'm saying that "the background scanning" should not do the page
aging.

Obviously "refill_inactive()" needs to do the page aging. I'm just not at
all convinced that "background scanning" == "refill_inactive()". 

		Linus

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