Re: [highmem bug report against -test5 and -test6] Re: [PATCH] Re:simple FS application that hangs 2.4-test5, mem mgmt problem or FS buffercache mgmt problem? (fwd)

[Ingo Molnar <mingo@elte.hu>]

On Mon, 2 Oct 2000, Rik van Riel wrote:

> > > > another thing is the complexity of marking a page dirty - right
> > > > now we can assume that page->buffers holds all the blocks. With
> > > > aging we must check wether a bh is there or not,
> > > 
> > > The code must already be able to handle this. This is nothing new.
> > 
> > sure this is new. The page->buffers list right now is assumed to
> > stay constant after being created.
> 
> Eeeeeek. So pages /cannot/ lose their buffer heads ???

it can and does lose them - but only all of them. Aging OTOH is a per-bh
thing, this kind of granularity is simply not present in the current
page->buffers handling. This is all i wanted to mention. Not unsolvable,
but needs extra logic.

	Ingo

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