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Message-ID: <2cd57c900508110209de388f2@mail.gmail.com>
Date: Thu, 11 Aug 2005 17:09:31 +0800
From: Coywolf Qi Hunt <coywolf@gmail.com>
Reply-To: coywolf@lovecn.org
To: Andrew Morton <akpm@osdl.org>
Subject: Re: How to reclaim inode pages on demand
Cc: Magnus Damm <magnus.damm@gmail.com>, mel@csn.ul.ie,
       linux-kernel@vger.kernel.org
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On 8/11/05, Andrew Morton <akpm@osdl.org> wrote:
> Magnus Damm <magnus.damm@gmail.com> wrote:
> >
> > On 8/11/05, Andrew Morton <akpm@osdl.org> wrote:
> > > Mel Gorman <mel@csn.ul.ie> wrote:
> > > > The majority of pages I am seeing no longer have page->mapping set. Does
> > > > this mean they are in the process of being cleared up?
> > >
> > > They're just anonymous pages, aren't they?  But you said "pages that are
> > > being used for inodes".  Confused.
> >
> > I thought page->mapping was used by rmap for both inode-backed and
> > anonymous pages. And the PAGE_MAPPING_ANON bit was used to determine
> > that page->mapping points to struct anon_vma instead of struct
> > address_space.
> >
> > When is page->mapping NULL?
> >
> 
> mm.h:page_mapping() handles all that.

at http://sosdg.org/~coywolf/lxr/source/include/linux/mm.h#L561
Should the comment be s/page_mapped/page->mapping/ ?

-- 
Coywolf Qi Hunt
http://ahbl.org/~coywolf/