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From: Arjan van de Ven <arjan@infradead.org>
To: "Thomas Hellström" <thomas@tungstengraphics.com>
Cc: Dave Jones <davej@redhat.com>, Dave Airlie <airlied@linux.ie>,
	Linux Kernel list <linux-kernel@vger.kernel.org>
Subject: Re: [patch 1/2] agpgart - allow user-populated memory types.
Date: Tue, 19 Dec 2006 14:11:17 +0100	[thread overview]
Message-ID: <1166533877.3365.1244.camel@laptopd505.fenrus.org> (raw)
In-Reply-To: <4587DF61.5020007@tungstengraphics.com>

On Tue, 2006-12-19 at 13:47 +0100, Thomas Hellström wrote:
> Arjan van de Ven wrote:
> 
> >>A short background:
> >>The current code uses vmalloc only. The potential use of kmalloc was 
> >>introduced
> >>to save memory and cpu-speed.
> >>All agp drivers expect to see a single memory chunk, so I'm not sure we 
> >>want to have an array of pages. That may require rewriting a lot of code.
> >>    
> >>
> >
> >but if it's clearly the right thing.....
> >How hard can it be? there are what.. 5 or 6 AGP drivers in the kernel?
> >
> >
> >  
> >
> Hmm,
> but we would still waste a lot of memory compared to kmalloc,

surely it's at most 4Kb for the entire system?

(if agp allows the non-root user to pin a lot more than that in kernel
memory there is a different problem of rlimits ;)

-- 
if you want to mail me at work (you don't), use arjan (at) linux.intel.com
Test the interaction between Linux and your BIOS via http://www.linuxfirmwarekit.org


  reply	other threads:[~2006-12-19 13:11 UTC|newest]

Thread overview: 18+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2006-12-08 18:24 Thomas Hellström
2006-12-08 22:03 ` Arjan van de Ven
2006-12-08 22:17 ` Arjan van de Ven
2006-12-08 23:05   ` Thomas Hellström
2006-12-19  8:47     ` Arjan van de Ven
2006-12-19  9:44       ` Thomas Hellström
2006-12-19 12:17         ` Arjan van de Ven
2006-12-19 12:47           ` Thomas Hellström
2006-12-19 13:11             ` Arjan van de Ven [this message]
2006-12-19 14:11               ` Thomas Hellström
2007-01-08  9:33               ` agpgart: drm-populated " thomas
2007-01-09  2:37                 ` Arjan van de Ven
2007-01-09  8:28                   ` Thomas Hellström
2007-01-09  8:23                 ` [PATCH] agpgart: Allow drm-populated agp " thomas
2007-01-09 14:05                   ` Arjan van de Ven
2007-01-09 14:06                   ` Arjan van de Ven
2007-01-23  9:33                     ` New patch: drm-populated " thomas
2007-01-23  9:33                       ` [PATCH] agpgart: Allow drm-populated agp " thomas

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