From: Peter Zijlstra <peterz@infradead.org>
To: Kyle McMartin <kyle@mcmartin.ca>
Cc: airlied@redhat.com, dri-devel@lists.sf.net,
linux-kernel@vger.kernel.org, jbarnes@virtuousgeek.org,
eric@anholt.net, stable@kernel.org, hugh.dickins@tiscali.co.uk,
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 21:17:53 +0200 [thread overview]
Message-ID: <1243365473.23657.32.camel@twins> (raw)
In-Reply-To: <20090526162717.GC14808@bombadil.infradead.org>
On Tue, 2009-05-26 at 12:27 -0400, Kyle McMartin wrote:
> From: Kyle McMartin <kyle@redhat.com>
>
> Ensure we allocate GEM objects below 4GB on PAE machines, otherwise
> misery ensues. This patch is based on a patch found on dri-devel by
> Shaohua Li, but Keith P. expressed reticence that the changes unfairly
> penalized other hardware.
>
> (The mm/shmem.c hunk is necessary to ensure the DMA32 flag isn't used
> by the slab allocator via radix_tree_preload, which will hit a
> WARN_ON.)
Why is this, is the gart not PAE friendly?
Seems to me its a grand way of promoting 64bit hard/soft-ware.
WARNING: multiple messages have this Message-ID (diff)
From: Peter Zijlstra <peterz@infradead.org>
To: Kyle McMartin <kyle@mcmartin.ca>
Cc: airlied@redhat.com, dri-devel@lists.sf.net,
linux-kernel@vger.kernel.org, jbarnes@virtuousgeek.org,
eric@anholt.net, stable@kernel.org, hugh.dickins@tiscali.co.uk,
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 21:17:53 +0200 [thread overview]
Message-ID: <1243365473.23657.32.camel@twins> (raw)
In-Reply-To: <20090526162717.GC14808@bombadil.infradead.org>
On Tue, 2009-05-26 at 12:27 -0400, Kyle McMartin wrote:
> From: Kyle McMartin <kyle@redhat.com>
>
> Ensure we allocate GEM objects below 4GB on PAE machines, otherwise
> misery ensues. This patch is based on a patch found on dri-devel by
> Shaohua Li, but Keith P. expressed reticence that the changes unfairly
> penalized other hardware.
>
> (The mm/shmem.c hunk is necessary to ensure the DMA32 flag isn't used
> by the slab allocator via radix_tree_preload, which will hit a
> WARN_ON.)
Why is this, is the gart not PAE friendly?
Seems to me its a grand way of promoting 64bit hard/soft-ware.
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next prev parent reply other threads:[~2009-05-26 19:21 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-05-26 16:27 [PATCH] drm: i915: ensure objects are allocated below 4GB on PAE Kyle McMartin
2009-05-26 16:27 ` Kyle McMartin
2009-05-26 19:17 ` Peter Zijlstra [this message]
2009-05-26 19:17 ` Peter Zijlstra
2009-05-26 21:35 ` Eric Anholt
2009-05-26 21:41 ` Peter Zijlstra
2009-05-26 21:41 ` Peter Zijlstra
2009-05-26 21:43 ` Kyle McMartin
2009-05-26 21:43 ` Kyle McMartin
2009-05-26 22:55 ` Hugh Dickins
2009-05-26 22:55 ` Hugh Dickins
2009-05-27 0:18 ` Kyle McMartin
2009-05-27 0:18 ` Kyle McMartin
2009-05-27 0:42 ` Shaohua Li
2009-05-27 0:42 ` Shaohua Li
2009-05-27 17:40 ` Eric Anholt
2009-05-27 18:23 ` Kyle McMartin
2009-05-27 18:23 ` Kyle McMartin
2009-05-31 0:49 ` Shaohua Li
2009-05-31 0:49 ` Shaohua Li
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