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

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Message-ID: <Pine.LNX.4.64.0704241344100.13005@schroedinger.engr.sgi.com>
Date:	Tue, 24 Apr 2007 13:44:50 -0700 (PDT)
From:	Christoph Lameter <clameter@....com>
To:	Andrew Morton <akpm@...ux-foundation.org>
cc:	Hugh Dickins <hugh@...itas.com>, 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, Andrew Morton wrote:

> > I would say that the filesystem is broke if it has such expectations 
> > regardless of page migration.
> 
> Others disagree ;)
> 
> The filesystem has *told* the core kernel what its allocation constraints
> are by setting up mapping_gfp_mask().  If the core kernel stops honouring
> that request then it is core kernel which is broken.

Then I think we should disable page migration for allocations that do not 
allow access to the policy zone. That would fix it.

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