linux-kernel - Re: linux-next: build warning after merge of the akpm-current tree

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Message-ID: <8de00532-f77d-1332-817e-7c546a775db8@hisilicon.com>
Date:   Wed, 6 Nov 2019 15:52:22 +0800
From:   Shaokun Zhang <zhangshaokun@...ilicon.com>
To:     Stephen Rothwell <sfr@...b.auug.org.au>,
        Andrew Morton <akpm@...ux-foundation.org>
CC:     Linux Next Mailing List <linux-next@...r.kernel.org>,
        "Linux Kernel Mailing List" <linux-kernel@...r.kernel.org>,
        yuqi jin <jinyuqi@...wei.com>, "Michal Hocko" <mhocko@...e.com>
Subject: Re: linux-next: build warning after merge of the akpm-current tree

Hi Stephen,

On 2019/11/6 15:05, Stephen Rothwell wrote:
> Hi all,
> 
> After merging the akpm-current tree, today's linux-next build (x86_64
> allmodconfig) produced this warning:
> 
> lib/cpumask.c: In function 'cpumask_local_spread':
> lib/cpumask.c:302:1: warning: the frame size of 5472 bytes is larger than 2048 bytes [-Wframe-larger-than=]
>   302 | }
>       | ^
> 
> Introduced by commit
> 
>   3d591f2836cf ("lib: optimize cpumask_local_spread()")
> 
> MAX_NUMNODES == (1 << NODES_SHIFT) and NODES_SHIFT == CONFIG_NODES_SHIFT== 10,
> so MAX_NUMNODES == 1024 and there is an int array and a bool array of that
> size declared here :-(

Thanks for the report and sorry for the warning, Michal has pointed this[1].
We are preparing the new solution and will post it soon.

[1] https://lkml.org/lkml/2019/11/5/66

Thanks,
Shaokun

>