linux-kernel - Re: [patch 2/5] mm: fault vs invalidate/truncate race fix

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Message-Id: <20061010230042.3d4e4df1.akpm@osdl.org>
Date:	Tue, 10 Oct 2006 23:00:42 -0700
From:	Andrew Morton <akpm@...l.org>
To:	Nick Piggin <nickpiggin@...oo.com.au>
Cc:	Nick Piggin <npiggin@...e.de>,
	Linux Memory Management <linux-mm@...ck.org>,
	Linux Kernel <linux-kernel@...r.kernel.org>,
	Linus Torvalds <torvalds@...l.org>
Subject: Re: [patch 2/5] mm: fault vs invalidate/truncate race fix

On Wed, 11 Oct 2006 15:39:22 +1000
Nick Piggin <nickpiggin@...oo.com.au> wrote:

> But I see that it does read twice. Do you want that behaviour retained? It
> seems like at this level it would be logical to read it once and let lower
> layers take care of any retries?

argh.  Linus has good-sounding reasons for retrying the pagefault-path's
read a single time, but I forget what they are.  Something to do with
networked filesystems?  (adds cc)
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