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Date: Mon, 10 Feb 2003 15:12:44 -0800
From: Andrew Morton <akpm@digeo.com>
To: David Howells <dhowells@redhat.com>
Cc: torvalds@transmeta.com, dhowells@redhat.com, jgarzik@redhat.com,
       linux-kernel@vger.kernel.org
Subject: Re: extra PG_* bits for page->flags
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David Howells <dhowells@redhat.com> wrote:
>
> 
> Hi Linus,
> 
> I'm writing a cache filesystem for primarily for caching AFS pages, but that
> also can be used for caching other network FS pages (such as NFSv4, which Jeff
> Garzik and Trond Myklebust are interested in, I think).

Is a new fs needed?  Is it not possible to use an existing filesystem of the
user's choice for local caching?

> ...
> 
>  (*) PG_journal
>  (*) PG_journalmark

Well.  If you new fs goes in then yes, we can spare those bits (just).  If
possible, consider making them "opaque address_space-private", so this prime
real estate can be shared with other filesystems (eg, PG_checked).

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