linux-kernel - Re: Pagecache: find_or_create_page does not call a proper page allocator function

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Message-ID: <Pine.LNX.4.64.0704241042550.8418@schroedinger.engr.sgi.com>
Date:	Tue, 24 Apr 2007 10:45:00 -0700 (PDT)
From:	Christoph Lameter <clameter@....com>
To:	Hugh Dickins <hugh@...itas.com>
cc:	Andrew Morton <akpm@...ux-foundation.org>,
	Nick Piggin <npiggin@...e.de>, linux-kernel@...r.kernel.org,
	pj@....com
Subject: Re: Pagecache: find_or_create_page does not call a proper page
 allocator function

On Tue, 24 Apr 2007, Hugh Dickins wrote:

> I've not yet looked at the patch under discussion, but this remark
> prompts me...  a couple of days ago I got very worried by the various
> hard-wired GFP_HIGHUSER allocations in mm/migrate.c and mm/mempolicy.c,
> and wondered how those would work out if someone has a blockdev mmap'ed.

I hope you are not confused by the fact that memory policies are only
ever applied to one zone on a node. This is either HIGHMEM or NORMAL. 
There is no memory policy support for other than the highest zone.

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