From: Ingo Molnar <mingo@elte.hu>
To: Jeremy Fitzhardinge <jeremy@goop.org>
Cc: "H. Peter Anvin" <hpa@zytor.com>,
William Lee Irwin III <wli@holomorphy.com>,
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: Thu, 5 Feb 2009 15:29:12 +0100 [thread overview]
Message-ID: <20090205142912.GE28443@elte.hu> (raw)
In-Reply-To: <498A5002.9080408@goop.org>
* Jeremy Fitzhardinge <jeremy@goop.org> wrote:
> On an x86 system which doesn't support global mappings,
> __supported_pte_mask has _PAGE_GLOBAL clear, to make sure it never
> appears in the PTE. pfn_pte() and so on will enforce it with:
btw., did you actually see a boot crash due to this, on a pre-PGE system?
Ingo
WARNING: multiple messages have this Message-ID (diff)
From: Ingo Molnar <mingo@elte.hu>
To: Jeremy Fitzhardinge <jeremy@goop.org>
Cc: Xen-devel <xen-devel@lists.xensource.com>,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
William Lee Irwin III <wli@holomorphy.com>,
"H. Peter Anvin" <hpa@zytor.com>
Subject: Re: __supported_pte_mask breaks PROT_NONE pages
Date: Thu, 5 Feb 2009 15:29:12 +0100 [thread overview]
Message-ID: <20090205142912.GE28443@elte.hu> (raw)
In-Reply-To: <498A5002.9080408@goop.org>
* Jeremy Fitzhardinge <jeremy@goop.org> wrote:
> On an x86 system which doesn't support global mappings,
> __supported_pte_mask has _PAGE_GLOBAL clear, to make sure it never
> appears in the PTE. pfn_pte() and so on will enforce it with:
btw., did you actually see a boot crash due to this, on a pre-PGE system?
Ingo
next prev parent reply other threads:[~2009-02-05 14:30 UTC|newest]
Thread overview: 12+ 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 2:33 ` Jeremy Fitzhardinge
2009-02-05 5:40 ` H. Peter Anvin
2009-02-05 14:28 ` Ingo Molnar
2009-02-05 14:29 ` Ingo Molnar [this message]
2009-02-05 14:29 ` Ingo Molnar
2009-02-05 17:23 ` Jeremy Fitzhardinge
2009-02-05 17:23 ` Jeremy Fitzhardinge
2009-02-05 17:30 ` Ingo Molnar
2009-02-05 17:30 ` Ingo Molnar
2009-02-05 18:00 ` Jeremy Fitzhardinge
2009-02-05 18:00 ` Jeremy Fitzhardinge
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