From: Robert Hancock <hancockr@shaw.ca>
To: Arjan van de Ven <arjan@infradead.org>
Cc: linux-kernel <linux-kernel@vger.kernel.org>,
Marcelo Tosatti <marcelo@kvack.org>
Subject: Re: [PATCH] introduce config option to disable DMA zone on i386
Date: Thu, 28 Dec 2006 14:14:17 -0600 [thread overview]
Message-ID: <45942599.7040409@shaw.ca> (raw)
In-Reply-To: <1167331040.3281.4363.camel@laptopd505.fenrus.org>
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/
next prev parent reply other threads:[~2006-12-28 20:12 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <fa.Nb4Y/frBNPmoag6ZL4pL3qEyDOs@ifi.uio.no>
[not found] ` <fa.XVmR+7tQ0v2oWVb7eyfQ8pGFhp8@ifi.uio.no>
2006-12-28 18:34 ` [PATCH] introduce config option to disable DMA zone on i386 Robert Hancock
2006-12-28 18:37 ` Arjan van de Ven
2006-12-28 20:14 ` Robert Hancock [this message]
2006-12-28 17:03 Marcelo Tosatti
2006-12-28 17:03 ` Marcelo Tosatti
2006-12-28 17:30 ` Paul Mundt
2006-12-28 17:30 ` Paul Mundt
2006-12-28 17:43 ` Arjan van de Ven
2006-12-28 17:43 ` Arjan van de Ven
2006-12-28 18:36 ` Jan Engelhardt
2006-12-28 18:36 ` Jan Engelhardt
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