linux-kernel - Re: [PATCH v2 3/4] powerpc/mm: fix a warning when a cache is common to PGD and hugepages

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Message-ID: <8ada20e9-3bc1-fdaf-d78f-2f5a317e8216@c-s.fr>
Date:   Thu, 23 Aug 2018 12:39:00 +0200
From:   Christophe LEROY <christophe.leroy@....fr>
To:     Segher Boessenkool <segher@...nel.crashing.org>
Cc:     "Aneesh Kumar K.V" <aneesh.kumar@...ux.ibm.com>,
        Benjamin Herrenschmidt <benh@...nel.crashing.org>,
        Paul Mackerras <paulus@...ba.org>,
        Michael Ellerman <mpe@...erman.id.au>,
        aneesh.kumar@...ux.vnet.ibm.com, linuxppc-dev@...ts.ozlabs.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 3/4] powerpc/mm: fix a warning when a cache is common
 to PGD and hugepages



Le 23/08/2018 à 12:36, Segher Boessenkool a écrit :
> On Thu, Aug 23, 2018 at 11:40:22AM +0200, Christophe LEROY wrote:
>> The only small problème I have is that some version of GCC seems to
>> complain about big memset() (132k and 256k ones). Is there a way to tell
>> GCC we really want to do it ?
> 
> I'm not sure what you mean.  Complain, is that a warning, is that an error?
> What does it say?  Do you have some example code to reproduce it?  Etc.

I saw the warnings in the checks at 
https://patchwork.ozlabs.org/patch/957566/
Unfortunatly the link is now broken.

Christophe

> 
> Very many things use tiny memsets like that, so you must mean something
> more specialised.
> 
> 
> Segher
>