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Re: [Xen-devel] [PATCH] 32on64: increase size of compat argumenttranslat

To: Jan Beulich <JBeulich@xxxxxxxxxx>, Ian Campbell <Ian.Campbell@xxxxxxxxxxxxx>, "xen-devel@xxxxxxxxxxxxxxxxxxx" <xen-devel@xxxxxxxxxxxxxxxxxxx>
Subject: Re: [Xen-devel] [PATCH] 32on64: increase size of compat argumenttranslation area to 2 pages
From: Keir Fraser <keir.fraser@xxxxxxxxxxxxx>
Date: Fri, 03 Jul 2009 14:47:52 +0100
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Thread-topic: [Xen-devel] [PATCH] 32on64: increase size of compat argumenttranslation area to 2 pages
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On 03/07/2009 14:31, "Jan Beulich" <JBeulich@xxxxxxxxxx> wrote:

>> Increasing COMPAT_ARG_XLAT_SIZE to 2 pages is sufficient to support
>> order 9 exchanges. PERCPU_SHIFT must also be increased since the
>> translation area is percpu.
> Perhaps we should decouple this by allocating those pages as CPUs get
> brought up, and just have a pointer in per-CPU storage.

Good idea. I will sort out a patch to do so, and apply Ian's patch on top. I
will backport both for 3.4.1.

 -- Keir

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