linux-kernel - Re: [PATCH] Make GFP_DMA allocations w/o ZONE

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Message-ID: <20110601181918.GO3660@n2100.arm.linux.org.uk>
Date:	Wed, 1 Jun 2011 19:19:18 +0100
From:	Russell King - ARM Linux <linux@....linux.org.uk>
To:	David Rientjes <rientjes@...gle.com>
Cc:	Dmitry Eremin-Solenikov <dbaryshkov@...il.com>,
	KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>,
	linux-mm@...ck.org, linux-kernel@...r.kernel.org,
	Mel Gorman <mel@....ul.ie>,
	KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>,
	Rik van Riel <riel@...hat.com>,
	Andrew Morton <akpm@...ux-foundation.org>
Subject: Re: [PATCH] Make GFP_DMA allocations w/o ZONE_DMA emit a warning
	instead of failing

On Wed, Jun 01, 2011 at 10:23:15AM -0700, David Rientjes wrote:
> On Wed, 1 Jun 2011, Dmitry Eremin-Solenikov wrote:
> 
> > I've hit this with IrDA driver on PXA. Also I've seen the report regarding
> > other ARM platform (ep-something). Thus I've included Russell in the cc.
> > 
> 
> So you want to continue to allow the page allocator to return pages from 
> anywhere, even when GFP_DMA is specified, just as though it was lowmem?

No.  What *everyone* is asking for is to allow the situation which has
persisted thus far to continue for ONE MORE RELEASE but with a WARNING
so that these problems can be found without causing REGRESSIONS.

That is NOT an unreasonable request, but it seems that its far too much
to ask of you.
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