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From: "Aneesh Kumar K.V" <aneesh.kumar@linux.vnet.ibm.com>
To: Alexander Graf <agraf@suse.com>, Liu ping fan <kernelfans@gmail.com>,
 Alexander Graf <agraf@suse.de>
Subject: Re: [PATCH v2] powernv: kvm: make _PAGE_NUMA take effect
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Date: Mon, 07 Apr 2014 13:12:29 +0530
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Cc: Paul Mackerras <paulus@samba.org>, linuxppc-dev@lists.ozlabs.org,
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Alexander Graf <agraf@suse.com> writes:

> On 03.04.14 04:36, Liu ping fan wrote:
>> Hi Alex, could you help to pick up this patch? since  v3.14 kernel can
>> enable numa fault for powerpc.
>
> What bad happens without this patch? We map a page even though it was 
> declared to get NUMA migrated? What happens next?

Nothing much, we won't be properly accounting the numa access in the
host.  What we want to achieve is to convert a guest access of the page to
a host fault so that we can do proper numa access accounting in the
host. This would enable us to migrate the page to the correct numa
node. 

>
> I'm trying to figure out whether I need to mark this with a stable tag 
> for 3.14.
>
>

-aneesh