linux-kernel - Re: [PATCH v2 1/4] mm: pagewalk: Fix walk for hugepage tables

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Date:   Fri, 25 Jun 2021 06:56:51 +0200
From:   Christophe Leroy <christophe.leroy@...roup.eu>
To:     Michael Ellerman <mpe@...erman.id.au>, akpm@...ux-foundation.org
Cc:     linux-arch@...r.kernel.org, linuxppc-dev@...ts.ozlabs.org,
        Oliver O'Halloran <oohall@...il.com>,
        linux-kernel@...r.kernel.org, linux-mm@...ck.org,
        Paul Mackerras <paulus@...ba.org>, dja@...ens.net,
        Steven Price <steven.price@....com>,
        Benjamin Herrenschmidt <benh@...nel.crashing.org>
Subject: Re: [PATCH v2 1/4] mm: pagewalk: Fix walk for hugepage tables



Le 25/06/2021 à 06:45, Michael Ellerman a écrit :
> Christophe Leroy <christophe.leroy@...roup.eu> writes:
>> Hi Michael,
>>
>> Le 19/04/2021 à 12:47, Christophe Leroy a écrit :
>>> Pagewalk ignores hugepd entries and walk down the tables
>>> as if it was traditionnal entries, leading to crazy result.
>>>
>>> Add walk_hugepd_range() and use it to walk hugepage tables.
>>
>> I see you took patch 2 and 3 of the series.
> 
> Yeah I decided those were bug fixes so could be taken separately.
> 
>> Do you expect Andrew to take patch 1 via mm tree, and then you'll take
>> patch 4 once mm tree is merged ?
> 
> I didn't feel I could take patch 1 via the powerpc tree without risking
> conflicts.
> 
> Andrew could take patch 1 and 4 via mm, though he might not want to pick
> them up this late.

Patch 4 needs patches 2 and 3 and doesn't apply without them so it is not that easy.

Maybe Andrew you can take patch 1 now and then Michael you can take patch 4 at anytime during 5.15 
preparation without any conflict risk ?

> 
> I guess step one would be to repost 1 and 4 as a new series. Either they
> can go via mm, or for 5.15 I could probably take them both as long as I
> pick them up early enough.
> 

I'll first repost patch 1 as standalone and see what happens.

Christophe