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Re: [Xen-devel] [PATCH] linux/i386: allow CONFIG_HIGHPTE on i386


  • To: Jan Beulich <jbeulich@xxxxxxxxxx>, <xen-devel@xxxxxxxxxxxxxxxxxxx>
  • From: Keir Fraser <keir@xxxxxxxxxxxxx>
  • Date: Wed, 10 Jan 2007 10:57:31 +0000
  • Delivery-date: Wed, 10 Jan 2007 02:57:15 -0800
  • List-id: Xen developer discussion <xen-devel.lists.xensource.com>
  • Thread-index: Acc0piAIXqvRtKCZEduNDgAX8io7RQ==
  • Thread-topic: [Xen-devel] [PATCH] linux/i386: allow CONFIG_HIGHPTE on i386

On 10/1/07 09:57, "Jan Beulich" <jbeulich@xxxxxxxxxx> wrote:

> The patch at once does away with the use of PageForeign on pte pages, to match
> x86-64 and to reduce the delta to native.

Is it actually safe to circumvent tlb_remove_page()? It does rather more
than just free_page()! That's why I used a ForeignPage hook when writing the
i386 code. It's certainly *not* safe to assume that whoever wrote that part
of the x86/64 port understood all the ramifications of what they were doing.

 -- Keir


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