From: Ingo Molnar <mingo@elte.hu>
To: "Ahmed S. Darwish" <darwish.07@gmail.com>
Cc: Rusty Russel <rusty@rustcorp.com.au>,
Suresh Siddha <suresh.b.siddha@intel.com>,
Thomas Gleixner <tglx@linutronix.de>,
lguest@ozlabs.org, linux-kernel@vger.kernel.org
Subject: Re: [Lguest/x86]: Clash with ioremap_nocache() + _PAGE_PWT
Date: Thu, 7 Feb 2008 00:59:23 +0100 [thread overview]
Message-ID: <20080206235923.GA19843@elte.hu> (raw)
In-Reply-To: <20080206232134.GB6450@ubuntu>
* Ahmed S. Darwish <darwish.07@gmail.com> wrote:
> Hi all,
>
> Beginning from commit 4138cc3418f5, ioremap_nocache() sets the _PAGE_PWT
> flag.
>
> Lguest doesn't accept a guest pte with a _PWT flag and reports a "bad
> page table entry" in that case.
>
> I've removed check from lguest code and everything worked fine. Is
> this safe from the Lguest side ?
yes, should be safe. Could you send a patch so that others can apply it
too?
Ingo
next prev parent reply other threads:[~2008-02-07 0:25 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-02-06 23:21 [Lguest/x86]: Clash with ioremap_nocache() + _PAGE_PWT Ahmed S. Darwish
2008-02-06 23:59 ` Ingo Molnar [this message]
2008-02-07 0:51 ` [PATCH] lguest: Accept guest _PAGE_PWT page table entries Ahmed S. Darwish
2008-02-07 1:00 ` Ingo Molnar
2008-03-04 1:37 ` Rusty Russell
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