From: "H. Peter Anvin" <hpa@zytor.com>
To: Jeremy Fitzhardinge <jeremy@goop.org>
Cc: Ingo Molnar <mingo@elte.hu>,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
Xen-devel <xen-devel@lists.xensource.com>
Subject: Re: __supported_pte_mask breaks PROT_NONE pages
Date: Wed, 04 Feb 2009 21:40:51 -0800 [thread overview]
Message-ID: <498A7BE3.40405@zytor.com> (raw)
In-Reply-To: <498A5002.9080408@goop.org>
[Dropped wli from the Cc: list because holomorphy.com doesn't resolve]
Jeremy Fitzhardinge wrote:
>
> I guess the best fix is to only apply __supported_pte_mask to present
> ptes. This seems like the right solution to me, as it means we can
> completely ignore the issue of overlaps between the present pte bits and
> the non-present pte-as-swap entry use of the bits. (Patch below.)
>
It certainly looks reasonable, so I have applied this patch to
tip:x86/urgent. However, since I'm on the way out to FOSDEM I won't be
able to run any tests on this.
-hpa
--
H. Peter Anvin, Intel Open Source Technology Center
I work for Intel. I don't speak on their behalf.
next prev parent reply other threads:[~2009-02-05 5:44 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-02-05 2:33 __supported_pte_mask breaks PROT_NONE pages Jeremy Fitzhardinge
2009-02-05 5:40 ` H. Peter Anvin [this message]
2009-02-05 14:28 ` Ingo Molnar
2009-02-05 14:29 ` Ingo Molnar
2009-02-05 17:23 ` Jeremy Fitzhardinge
2009-02-05 17:30 ` Ingo Molnar
2009-02-05 18:00 ` Jeremy Fitzhardinge
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