linux-kernel - Re: 2.6.26: x86/kernel/pci_dma.c: gfp |= __GFP

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Message-ID: <alpine.LFD.1.10.0805222157300.3295@apollo.tec.linutronix.de>
Date:	Thu, 22 May 2008 21:58:11 +0200 (CEST)
From:	Thomas Gleixner <tglx@...utronix.de>
To:	Andi Kleen <andi@...stfloor.org>
cc:	Glauber Costa <gcosta@...hat.com>,
	Miquel van Smoorenburg <miquels@...tron.nl>,
	linux-kernel@...r.kernel.org, linux-mm@...ck.org,
	andi-suse@...stfloor.org
Subject: Re: 2.6.26: x86/kernel/pci_dma.c: gfp |= __GFP_NORETRY ?

On Thu, 22 May 2008, Andi Kleen wrote:
> On Wed, May 21, 2008 at 09:49:27AM -0300, Glauber Costa wrote:
> > probably andi has a better idea on why it was added, since it used to 
> > live in his tree?
> 
> d_a_c() tries a couple of zones, and running the oom killer for each
> is inconvenient. Especially for the 16MB DMA zone which is unlikely
> to be cleared by the OOM killer anyways because normal user applications
> don't put pages in there. There was a real report with some problems
> in this area.

Can you give some pointers please ?

Thanks,
	tglx


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