linux-kernel - Re: [PATCH 2/3] page allocator: Do not allow interrupts to use ALLOC

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Message-ID: <4AECCF6A.4020206@redhat.com>
Date:	Sat, 31 Oct 2009 19:59:38 -0400
From:	Rik van Riel <riel@...hat.com>
To:	Pavel Machek <pavel@....cz>
CC:	David Rientjes <rientjes@...gle.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Mel Gorman <mel@....ul.ie>, stable@...nel.org,
	linux-kernel@...r.kernel.org, linux-mm@...ck.org,
	Frans Pop <elendil@...net.nl>, Jiri Kosina <jkosina@...e.cz>,
	Sven Geggus <lists@...hsschwanzdomain.de>,
	Karol Lewandowski <karol.k.lewandowski@...il.com>,
	Tobias Oetiker <tobi@...iker.ch>,
	KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>,
	Pekka Enberg <penberg@...helsinki.fi>,
	Christoph Lameter <cl@...ux-foundation.org>,
	Stephan von Krawczynski <skraw@...net.com>,
	kernel-testers@...r.kernel.org
Subject: Re: [PATCH 2/3] page allocator: Do not allow interrupts to use ALLOC_HARDER

On 10/31/2009 04:11 PM, Pavel Machek wrote:

> But we can't guarantee that enough memory will be ready in the
> reserves. So if realtime task relies on it, it is broken, and will
> fail to meet its deadlines from time to time.

Any realtime task that does networking (which may be the
majority of realtime tasks) relies on the kernel memory
allocator.

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