Date: Sat, 20 Mar 2004 20:03:08 +0100
From: Andrea Arcangeli <andrea@suse.de>
To: William Lee Irwin III <wli@holomorphy.com>, linux-kernel@vger.kernel.org,
       Andrew Morton <akpm@osdl.org>, Linus Torvalds <torvalds@osdl.org>
Subject: Re: can device drivers return non-ram via vm_ops->nopage?
Message-ID: <20040320190308.GF9009@dualathlon.random>
References: <20040320133025.GH9009@dualathlon.random> <20040320144022.GC2045@holomorphy.com> <20040320150621.GO9009@dualathlon.random> <20040320154419.A6726@flint.arm.linux.org.uk> <20040320155739.GQ9009@dualathlon.random> <20040320161538.C6726@flint.arm.linux.org.uk> <20040320162534.GU9009@dualathlon.random> <20040320174857.GA9009@dualathlon.random>
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On Sat, Mar 20, 2004 at 06:48:57PM +0100, Andrea Arcangeli wrote:
> be needed to hide the bug). This untested patch should make it working
> with non-ram too, so it sounds safer for the short term. I will test it

btw, that works only if NUMA is disabled. there's no way to do
page_to_pfn with a non-ram page with numa enabled since page_zone starts
by reading page->flags, only pte_pfn works (as I found from Martin's
oops).
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