Messages in this thread | | | Subject | Re: [kbuild-all] Re: kernel/rcu/tree.c:2073:23: warning: stack frame size of 2704 bytes in function 'rcu_gp_kthread' | From | Rong Chen <> | Date | Mon, 7 Jun 2021 17:18:21 +0800 |
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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
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