linux-kernel - Re: [PATCH 2/2] powerpc/mm/autonuma: Switch ppc64 to its own implementeation of saved write

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Date:   Tue, 14 Feb 2017 22:01:43 +1100
From:   Michael Ellerman <mpe@...erman.id.au>
To:     Michael Neuling <mikey@...ling.org>,
        "Aneesh Kumar K.V" <aneesh.kumar@...ux.vnet.ibm.com>,
        akpm@...ux-foundation.org, Rik van Riel <riel@...riel.com>,
        Mel Gorman <mgorman@...hsingularity.net>, paulus@...abs.org,
        benh@...nel.crashing.org
Cc:     linux-mm@...ck.org, linuxppc-dev@...ts.ozlabs.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH 2/2] powerpc/mm/autonuma: Switch ppc64 to its own implementeation of saved write

Michael Neuling <mikey@...ling.org> writes:

> On Thu, 2017-02-09 at 08:30 +0530, Aneesh Kumar K.V wrote:
>> With this our protnone becomes a present pte with READ/WRITE/EXEC bit cleared.
>> By default we also set _PAGE_PRIVILEGED on such pte. This is now used to help
>> us identify a protnone pte that as saved write bit. For such pte, we will
>> clear
>> the _PAGE_PRIVILEGED bit. The pte still remain non-accessible from both user
>> and kernel.
>> 
>> Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@...ux.vnet.ibm.com>
>
>
> FWIW I've tested this, so:
>
> Acked-By: Michael Neuling <mikey@...ling.org>

In future if you've tested something then "Tested-by:" is the right tag
to use.

cheers