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

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Message-Id: <1161395605.10524.227.camel@localhost.localdomain>
Date:	Sat, 21 Oct 2006 11:53:25 +1000
From:	Benjamin Herrenschmidt <benh@...nel.crashing.org>
To:	Nick Piggin <nickpiggin@...oo.com.au>
Cc:	Andrew Morton <akpm@...l.org>, Nick Piggin <npiggin@...e.de>,
	Linux Memory Management <linux-mm@...ck.org>,
	Linux Kernel <linux-kernel@...r.kernel.org>
Subject: Re: [patch 2/5] mm: fault vs invalidate/truncate race fix


> Without looking at any code, perhaps we could instead run get_user_pages
> and copy the memory that way.

I have a deep hatred for get_user_pages().... maybe not totally rational
though :) It will also only work with things that are actually backed up
by struct page. Is that ok in your case ?

Ben.


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