linux-kernel - Re: PAGE_CACHE

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Message-Id: <1238549424.27006.7757.camel@localhost.localdomain>
Date:	Tue, 31 Mar 2009 17:30:24 -0800
From:	Suresh Siddha <suresh.b.siddha@...el.com>
To:	Jesse Barnes <jbarnes@...tuousgeek.org>
Cc:	"Pallipadi, Venkatesh" <venkatesh.pallipadi@...el.com>,
	Eric Anholt <eric@...olt.net>,
	lkml <linux-kernel@...r.kernel.org>
Subject: Re: PAGE_CACHE_WC strikes again

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?

thanks,
suresh

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