From: Rong Chen <rong.a.chen@intel.com>
To: Arnd Bergmann <arnd@kernel.org>,
Vincent Guittot <vincent.guittot@linaro.org>
Cc: kernel test robot <lkp@intel.com>,
kbuild-all@lists.01.org,
clang-built-linux <clang-built-linux@googlegroups.com>,
linux-kernel <linux-kernel@vger.kernel.org>,
Ingo Molnar <mingo@kernel.org>,
"Peter Zijlstra (Intel)" <peterz@infradead.org>,
Valentin Schneider <valentin.schneider@arm.com>
Subject: Re: [kbuild-all] Re: kernel/sched/fair.c:9551:12: warning: stack frame size of 1376 bytes in function 'load_balance'
Date: Thu, 20 May 2021 17:23:34 +0800 [thread overview]
Message-ID: <cae151a3-7d88-a1fd-4d34-d599238f6a4e@intel.com> (raw)
In-Reply-To: <CAK8P3a0YVh=hoBthjH7N=mSXOi0fEdwvyuHUJ36qricqVUZ9jA@mail.gmail.com>
On 5/19/21 8:32 PM, Arnd Bergmann wrote:
> On Mon, May 17, 2021 at 3:45 PM Vincent Guittot
> <vincent.guittot@linaro.org> wrote:
>> On Tue, 11 May 2021 at 18:01, kernel test robot <lkp@intel.com> wrote:
>>> tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
>>> head: 1140ab592e2ebf8153d2b322604031a8868ce7a5
>>> commit: 0826530de3cbdc89e60a89e86def94a5f0fc81ca sched/fair: Remove update of blocked load from newidle_balance
>>> date: 9 weeks ago
>>> config: mips-randconfig-r022-20210511 (attached as .config)
>>> compiler: clang version 13.0.0 (https://github.com/llvm/llvm-project a0fed635fe1701470062495a6ffee1c608f3f1bc)
>>> reproduce (this is a W=1 build):
>>> wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
>>> chmod +x ~/bin/make.cross
>>> # install mips cross compiling tool for clang build
>>> # apt-get install binutils-mips-linux-gnu
>>> # https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=0826530de3cbdc89e60a89e86def94a5f0fc81ca
>>> git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
>>> git fetch --no-tags linus master
>>> git checkout 0826530de3cbdc89e60a89e86def94a5f0fc81ca
>>> # save the attached .config to linux build tree
>>> COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 ARCH=mips
>> It was a bit difficult to find the warning among the thousand
> I opened an issue against clang about it:
>
> See https://github.com/ClangBuiltLinux/linux/issues/1379
Hi Arnd,
We have disabled CONFIG_UBSAN_ALIGNMENT for mips/clang in our kconfigs
according to the comments in the above link.
Best Regards,
Rong Chen
>
> but then found that this is already known. I think it would be best to
> make the kernel test robot
> set CONFIG_COMPILE_TEST to avoid issues like this. I have annotated a
> number of symbols
> that are known to cause unnecessary false positives in a similar way
> to get a clean build.
>
> Arnd
> _______________________________________________
> kbuild-all mailing list -- kbuild-all@lists.01.org
> To unsubscribe send an email to kbuild-all-leave@lists.01.org
prev parent reply other threads:[~2021-05-20 9:24 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-05-11 16:00 kernel/sched/fair.c:9551:12: warning: stack frame size of 1376 bytes in function 'load_balance' kernel test robot
2021-05-17 13:45 ` Vincent Guittot
2021-05-19 12:32 ` Arnd Bergmann
2021-05-20 9:23 ` Rong Chen [this message]
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