From: Kyle McMartin <kyle@mcmartin.ca>
To: Hugh Dickins <hugh.dickins@tiscali.co.uk>
Cc: Kyle McMartin <kyle@mcmartin.ca>,
airlied@redhat.com, dri-devel@lists.sf.net,
linux-kernel@vger.kernel.org, jbarnes@virtuousgeek.org,
eric@anholt.net, stable@kernel.org, linux-mm@kvack.org,
shaohua.li@intel.com
Subject: Re: [PATCH] drm: i915: ensure objects are allocated below 4GB on PAE
Date: Tue, 26 May 2009 20:18:40 -0400 [thread overview]
Message-ID: <20090527001840.GC16929@bombadil.infradead.org> (raw)
In-Reply-To: <Pine.LNX.4.64.0905262343140.13452@sister.anvils>
On Tue, May 26, 2009 at 11:55:50PM +0100, Hugh Dickins wrote:
> I'm confused: I thought GFP_DMA32 only applies on x86_64:
> my 32-bit PAE machine with (slightly!) > 4GB shows no ZONE_DMA32.
> Does this patch perhaps depend on another, to enable DMA32 on 32-bit
> PAE, or am I just in a muddle?
>
No, you're exactly right, I'm just a muppet and missed the obvious.
Looks like the "correct" fix is the fact that the allocation is thus
filled out with GFP_USER, therefore, from ZONE_NORMAL, and below
max_low_pfn.
Looks like we'll need some additional thinking to get true ZONE_DMA32 on
i386... ugh, I'll look into it tonight.
regards, Kyle
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next prev parent reply other threads:[~2009-05-27 0:19 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-05-26 16:27 Kyle McMartin
2009-05-26 19:17 ` Peter Zijlstra
2009-05-26 21:35 ` Eric Anholt
2009-05-26 21:41 ` Peter Zijlstra
2009-05-26 21:43 ` Kyle McMartin
2009-05-26 22:55 ` Hugh Dickins
2009-05-27 0:18 ` Kyle McMartin [this message]
2009-05-27 0:42 ` Shaohua Li
2009-05-27 17:40 ` Eric Anholt
2009-05-27 18:23 ` Kyle McMartin
2009-05-31 0:49 ` Shaohua Li
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