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 Tue, 3 Oct 2000, Andrea Arcangeli wrote:

> > 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,
> 

> I'm pretty sure it doesn't worth the per-bh thing. And even if it
> would make any difference with a 1k fs for good performance 4k blksize
> is necessary anyway for other reasons.

well if those bhs are aged by the normal buffer-cache aging mechanizm,
then there is no choice but to age them at bh granularity, not page
granularity. (this is only interesting in the case of 1k filesystems.)
Aging page->buffers at bh granularity creates interesting situations.

	Ingo

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