linux-kernel - Re: PAGE_CACHE

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Message-ID: <20090331185712.482877d6@hobbes>
Date:	Tue, 31 Mar 2009 18:57:12 -0700
From:	Jesse Barnes <jbarnes@...tuousgeek.org>
To:	suresh.b.siddha@...el.com
Cc:	"Pallipadi, Venkatesh" <venkatesh.pallipadi@...el.com>,
	Eric Anholt <eric@...olt.net>,
	lkml <linux-kernel@...r.kernel.org>, airlied@...il.com
Subject: Re: PAGE_CACHE_WC strikes again

On Tue, 31 Mar 2009 17:30:24 -0800
Suresh Siddha <suresh.b.siddha@...el.com> wrote:

> On Tue, 2009-03-31 at 18:12 -0700, Jesse Barnes wrote:
> > Right, the drm driver code went in before we had
> > pgprot_writecombine. Now that it's available we should definitely
> > use it.  I'm not sure about the set_memory_* routines though; we
> > create io mappings in i915_dma.c at init time, and I thought we
> > took care of things in i915_gem.c but we may need updates there.
> 
> Jesse, yes i915_gem.c seems to be doing the right thing.
> 
> What about various fault handlers in drm_vm.c like
> drm_do_vm_shm_fault() etc. None of these fault handlers require
> special attributes like wc/uc etc?

Those are legacy.  I don't think they need anything changed...  Dave
could correct me though.

-- 
Jesse Barnes, Intel Open Source Technology Center
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