Re: [PATCH] drm: i915: ensure objects are allocated below 4GB onPAE

From: Kyle McMartin
Date: Tue May 26 2009 - 20:19:12 EST

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

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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