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Re: Review of Thomas's >2GB ext2fs proposal

From: Thomas Bushnell BSG
Subject: Re: Review of Thomas's >2GB ext2fs proposal
Date: 17 Aug 2004 03:23:30 -0700
User-agent: Gnus/5.09 (Gnus v5.9.0) Emacs/21.3

"Neal H. Walfield" <neal@cs.uml.edu> writes:

> Nope, the page is freed.  The only memory that is consumed is the
> associations in the two hashes.  However, I have now become convinced
> that the better strategy is to drop the association in the release
> function if the kernel does not have a copy.

Ok, so now you've said two inconsistent things.

When a page is paged out, what happens, exactly?  Does it always get
freed, or only when there are no references left?  Does the
association between the VM page and the disk remain, or not, and
always, or only sometimes?

It sounds like you have now said "don't worry, if there are references
nothing is freed", and now, "don't worry, everything is always freed
(or would be if your better strategy is adopted)."


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