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Subject: Re: [RFC][PATCH] Cross Memory Attach
From: Peter Zijlstra <peterz@infradead.org>
To: Linus Torvalds <torvalds@linux-foundation.org>
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Date: Thu, 16 Sep 2010 19:47:07 +0200
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On Thu, 2010-09-16 at 10:34 -0700, Linus Torvalds wrote:
> 
> Of course, these days I would seriously suggest against trying to
> optimize the kmap() case. It only matters on crap hardware these days.
> Anybody running HIGHMEM in 2010 and thinks that it makes sense
> deserves the pain the get. We should not complicate the kernel further
> for it, and sane architectures will have a no-op kmap(). 

OK, fully agreed. Someone ought to tell ARM though :-)