linux-kernel - Re: [PATCH] xen: fix allocation and use of large ldts

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Message-ID: <20080728122648.GC5515@elte.hu>
Date:	Mon, 28 Jul 2008 14:26:48 +0200
From:	Ingo Molnar <mingo@...e.hu>
To:	Jeremy Fitzhardinge <jeremy@...p.org>
Cc:	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	the arch/x86 maintainers <x86@...nel.org>
Subject: Re: [PATCH] xen: fix allocation and use of large ldts


* Jeremy Fitzhardinge <jeremy@...p.org> wrote:

> When the ldt gets to more than 1 page in size, the kernel uses vmalloc
> to allocate it.  This means that:
> - when making the ldt RO, we must update the pages in both the vmalloc
>   mapping and the linear mapping to make sure there are no RW aliases.
> - we need to use arbitrary_virt_to_machine to compute the machine addr
>   for each update

applied to tip/x86/xen, thanks Jeremy.

	Ingo
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