From: Rong Chen <rong.a.chen@intel.com>
To: paulmck@kernel.org, kernel test robot <lkp@intel.com>
Cc: kbuild-all@lists.01.org, clang-built-linux@googlegroups.com,
linux-kernel@vger.kernel.org
Subject: Re: [kbuild-all] Re: kernel/rcu/tree.c:2073:23: warning: stack frame size of 2704 bytes in function 'rcu_gp_kthread'
Date: Mon, 7 Jun 2021 17:18:21 +0800 [thread overview]
Message-ID: <4696fe3d-a7ad-acae-686e-6295ca327737@intel.com> (raw)
In-Reply-To: <20210606044926.GJ4397@paulmck-ThinkPad-P17-Gen-1>
On 6/6/21 12:49 PM, Paul E. McKenney wrote:
> On Sun, Jun 06, 2021 at 12:19:57PM +0800, kernel test robot wrote:
>> Hi Paul,
>>
>> FYI, the error/warning still remains.
>>
>> tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
>> head: f5b6eb1e018203913dfefcf6fa988649ad11ad6e
>> commit: 7dffe01765d9309b8bd5505503933ec0ec53d192 rcu: Add lockdep_assert_irqs_disabled() to raw_spin_unlock_rcu_node() macros
>> date: 5 months ago
>> config: powerpc-randconfig-r023-20210606 (attached as .config)
>> compiler: clang version 13.0.0 (https://github.com/llvm/llvm-project 551a697c5cf33275b66add4fc467fcf59084cffb)
>> 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 powerpc cross compiling tool for clang build
>> # apt-get install binutils-powerpc-linux-gnu
>> # https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=7dffe01765d9309b8bd5505503933ec0ec53d192
>> git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
>> git fetch --no-tags linus master
>> git checkout 7dffe01765d9309b8bd5505503933ec0ec53d192
>> # save the attached .config to linux build tree
>> COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=powerpc
>>
>> If you fix the issue, kindly add following tag as appropriate
>> Reported-by: kernel test robot <lkp@intel.com>
>>
>> All warnings (new ones prefixed by >>):
>>
>> In file included from kernel/rcu/tree.c:21:
>> In file included from include/linux/kernel.h:12:
>> In file included from include/linux/bitops.h:29:
>> In file included from arch/powerpc/include/asm/bitops.h:62:
>> arch/powerpc/include/asm/barrier.h:49:9: warning: '__lwsync' macro redefined [-Wmacro-redefined]
>> #define __lwsync() __asm__ __volatile__ (stringify_in_c(LWSYNC) : : :"memory")
>> ^
>> <built-in>:310:9: note: previous definition is here
>> #define __lwsync __builtin_ppc_lwsync
>> ^
>>>> kernel/rcu/tree.c:2073:23: warning: stack frame size of 2704 bytes in function 'rcu_gp_kthread' [-Wframe-larger-than=]
>> static int __noreturn rcu_gp_kthread(void *unused)
> Does -rcu commit 2f20de99a63b ("rcu: Make rcu_gp_cleanup() be noinline
> for tracing") help?
Hi Paul,
The stack frame size decreased to 2256 bytes:
kernel/rcu/tree.c:2129:23: warning: stack frame size of 2256 bytes in
function 'rcu_gp_kthread' [-Wframe-larger-than=]
Best Regards,
Rong Chen
WARNING: multiple messages have this Message-ID (diff)
From: Rong Chen <rong.a.chen@intel.com>
To: kbuild-all@lists.01.org
Subject: Re: kernel/rcu/tree.c:2073:23: warning: stack frame size of 2704 bytes in function 'rcu_gp_kthread'
Date: Mon, 07 Jun 2021 17:18:21 +0800 [thread overview]
Message-ID: <4696fe3d-a7ad-acae-686e-6295ca327737@intel.com> (raw)
In-Reply-To: <20210606044926.GJ4397@paulmck-ThinkPad-P17-Gen-1>
[-- Attachment #1: Type: text/plain, Size: 2707 bytes --]
On 6/6/21 12:49 PM, Paul E. McKenney wrote:
> On Sun, Jun 06, 2021 at 12:19:57PM +0800, kernel test robot wrote:
>> Hi Paul,
>>
>> FYI, the error/warning still remains.
>>
>> tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
>> head: f5b6eb1e018203913dfefcf6fa988649ad11ad6e
>> commit: 7dffe01765d9309b8bd5505503933ec0ec53d192 rcu: Add lockdep_assert_irqs_disabled() to raw_spin_unlock_rcu_node() macros
>> date: 5 months ago
>> config: powerpc-randconfig-r023-20210606 (attached as .config)
>> compiler: clang version 13.0.0 (https://github.com/llvm/llvm-project 551a697c5cf33275b66add4fc467fcf59084cffb)
>> 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 powerpc cross compiling tool for clang build
>> # apt-get install binutils-powerpc-linux-gnu
>> # https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=7dffe01765d9309b8bd5505503933ec0ec53d192
>> git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
>> git fetch --no-tags linus master
>> git checkout 7dffe01765d9309b8bd5505503933ec0ec53d192
>> # save the attached .config to linux build tree
>> COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=powerpc
>>
>> If you fix the issue, kindly add following tag as appropriate
>> Reported-by: kernel test robot <lkp@intel.com>
>>
>> All warnings (new ones prefixed by >>):
>>
>> In file included from kernel/rcu/tree.c:21:
>> In file included from include/linux/kernel.h:12:
>> In file included from include/linux/bitops.h:29:
>> In file included from arch/powerpc/include/asm/bitops.h:62:
>> arch/powerpc/include/asm/barrier.h:49:9: warning: '__lwsync' macro redefined [-Wmacro-redefined]
>> #define __lwsync() __asm__ __volatile__ (stringify_in_c(LWSYNC) : : :"memory")
>> ^
>> <built-in>:310:9: note: previous definition is here
>> #define __lwsync __builtin_ppc_lwsync
>> ^
>>>> kernel/rcu/tree.c:2073:23: warning: stack frame size of 2704 bytes in function 'rcu_gp_kthread' [-Wframe-larger-than=]
>> static int __noreturn rcu_gp_kthread(void *unused)
> Does -rcu commit 2f20de99a63b ("rcu: Make rcu_gp_cleanup() be noinline
> for tracing") help?
Hi Paul,
The stack frame size decreased to 2256 bytes:
kernel/rcu/tree.c:2129:23: warning: stack frame size of 2256 bytes in
function 'rcu_gp_kthread' [-Wframe-larger-than=]
Best Regards,
Rong Chen
next prev parent reply other threads:[~2021-06-07 9:18 UTC|newest]
Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-06-06 4:19 kernel/rcu/tree.c:2073:23: warning: stack frame size of 2704 bytes in function 'rcu_gp_kthread' kernel test robot
2021-06-06 4:19 ` kernel test robot
2021-06-06 4:49 ` Paul E. McKenney
2021-06-06 4:49 ` Paul E. McKenney
2021-06-07 9:18 ` Rong Chen [this message]
2021-06-07 9:18 ` Rong Chen
2021-06-07 15:19 ` [kbuild-all] " Paul E. McKenney
2021-06-07 15:19 ` Paul E. McKenney
2021-06-08 3:14 ` [kbuild-all] " Rong Chen
2021-06-08 3:14 ` Rong Chen
2021-06-08 5:01 ` [kbuild-all] " Paul E. McKenney
2021-06-08 5:01 ` Paul E. McKenney
2021-06-08 5:34 ` [kbuild-all] " Rong Chen
2021-06-08 5:34 ` Rong Chen
2021-06-08 15:53 ` [kbuild-all] " Nathan Chancellor
2021-06-08 15:53 ` Nathan Chancellor
2021-06-09 3:58 ` [kbuild-all] " Paul E. McKenney
2021-06-09 3:58 ` Paul E. McKenney
2021-06-09 4:14 ` [kbuild-all] " Nathan Chancellor
2021-06-09 4:14 ` Nathan Chancellor
2021-06-09 17:23 ` [kbuild-all] " Paul E. McKenney
2021-06-09 17:23 ` Paul E. McKenney
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