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Date: Sun, 23 Nov 2008 10:24:53 -0800
From: Andrew Morton <akpm@linux-foundation.org>
To: Ingo Molnar <mingo@elte.hu>
Cc: Ying Han <yinghan@google.com>, linux-mm@kvack.org,
       linux-kernel@vger.kernel.org, Mike Waychison <mikew@google.com>,
       David Rientjes <rientjes@google.com>, Rohit Seth <rohitseth@google.com>,
       Hugh Dickins <hugh@veritas.com>, Nick Piggin <npiggin@suse.de>,
       Peter Zijlstra <a.p.zijlstra@chello.nl>,
       "H. Peter Anvin" <hpa@zytor.com>
Subject: Re: [RFC v1][PATCH]page_fault retry with NOPAGE_RETRY
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On Sun, 23 Nov 2008 10:18:44 +0100 Ingo Molnar <mingo@elte.hu> wrote:

> * Ying Han <yinghan@google.com> wrote:
> 
> > page fault retry with NOPAGE_RETRY
> 
> Interesting patch.

<a grey call stirs>

ahhh...  I thought this all sounded familiar.  It surfaced a couple of
years ago, and this was my summary of the intent at the time:

http://lkml.indiana.edu/hypermail/linux/kernel/0609.1/2106.html

It all went round and round for a while, but I don't think anything got
merged.  In fact I can't even find Ben's original little spufs/cell
NOPAGE_RETRY code in the tree, an I thought we merged that.  Confused.

The questions are, of course: does this new code address the issues
which were raised at that time?

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