linux-kernel - Re: mm/migrate.c:1406:5: warning: stack frame size of 2096 bytes in function 'migrate

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Message-Id: <20210531151412.4dad38dd703119cdd33ca395@linux-foundation.org>
Date:   Mon, 31 May 2021 15:14:12 -0700
From:   Andrew Morton <akpm@...ux-foundation.org>
To:     kernel test robot <lkp@...el.com>
Cc:     Yang Shi <shy828301@...il.com>, kbuild-all@...ts.01.org,
        clang-built-linux@...glegroups.com, linux-kernel@...r.kernel.org,
        Zi Yan <ziy@...dia.com>,
        Linux Memory Management List <linux-mm@...ck.org>
Subject: Re: mm/migrate.c:1406:5: warning: stack frame size of 2096 bytes in
 function 'migrate_pages'

On Sun, 30 May 2021 17:46:48 +0800 kernel test robot <lkp@...el.com> wrote:

> tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
> head:   b90e90f40b4ff23c753126008bf4713a42353af6
> commit: dd4ae78a21fc05d91d841e499dddd057ad64a4df mm: migrate: simplify the logic for handling permanent failure

migrate_pages() isn't a good place to be using lots of stack.  

Am I correct in assuming that this is a bisection result?

I don't immediately see why dd4ae78a21fc05d91d would be the main cause
of this.