Date: Thu, 28 Dec 2006 14:14:17 -0600
From: Robert Hancock <hancockr@shaw.ca>
Subject: Re: [PATCH] introduce config option to disable DMA zone on i386
In-reply-to: <1167331040.3281.4363.camel@laptopd505.fenrus.org>
To: Arjan van de Ven <arjan@infradead.org>
Cc: linux-kernel <linux-kernel@vger.kernel.org>,
       Marcelo Tosatti <marcelo@kvack.org>
Message-id: <45942599.7040409@shaw.ca>
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Arjan van de Ven wrote:
> ...but Marcelo's patch doesn't implement anything of that kind....
> In addition, many ISA bus drivers do not use the DMA API *at all*
> currently. If you want to fix them all up, great! But somehow I doubt
> those will get fixed in the next decade.. they've been like this for at
> least half a decade or longer :-)

Point being, if this doesn't already work it's likely a bug even without 
this patch. And drivers that don't use the DMA API should at least be 
allocating memory with GFP_DMA which should fail if that zone doesn't 
contain any memory (and if not, that's likely a bug as well).

-- 
Robert Hancock      Saskatoon, SK, Canada
To email, remove "nospam" from hancockr@nospamshaw.ca
Home Page: http://www.roberthancock.com/

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