From mboxrd@z Thu Jan  1 00:00:00 1970
From: linux@arm.linux.org.uk (Russell King - ARM Linux)
Date: Wed, 5 Jan 2011 23:59:22 +0000
Subject: still nfs problems [Was: Linux 2.6.37-rc8]
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	<1294262208.2952.4.camel@heimdal.trondhjem.org>
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To: linux-arm-kernel@lists.infradead.org
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On Wed, Jan 05, 2011 at 03:28:53PM -0800, Linus Torvalds wrote:
> On Wed, Jan 5, 2011 at 3:06 PM, Trond Myklebust
> <Trond.Myklebust@netapp.com> wrote:
> >
> > Yes. The fix I sent out was a call to invalidate_kernel_vmap_range(),
> > which takes care of invalidating the cache prior to a virtual address
> > read.
> >
> > My question was specifically about the write through the regular kernel
> > mapping: according to Russell and my reading of the cachetlb.txt
> > documentation, flush_dcache_page() is only guaranteed to have an effect
> > on page cache pages.
> 
> I don't think that should ever matter. It's not like the hardware can
> know whether it's a dcache page or not.
> 
> And if the sw implementation cares, it's doing something really odd.