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Subject: RE: [kbuild-all] Re: [PATCH v1 1/1] sched/fair: do not preempt
 current task if it is going to call schedule()
Thread-Topic: [kbuild-all] Re: [PATCH v1 1/1] sched/fair: do not preempt
 current task if it is going to call schedule()
Thread-Index: AQHV8vwSaUDvAnC/i0OErjRILa0VAag6GycQ
Date:   Thu, 5 Mar 2020 15:14:29 +0000
Message-ID: <831EE4E5E37DCC428EB295A351E66249524206DF@shsmsx102.ccr.corp.intel.com>
References: <20200305081611.29323-2-cl@rock-chips.com>
 <202003052243.P59yLrjh%lkp@intel.com>
In-Reply-To: <202003052243.P59yLrjh%lkp@intel.com>
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> Subject: [kbuild-all] Re: [PATCH v1 1/1] sched/fair: do not preempt current task if
> it is going to call schedule()
> 
> Hi,
> 
> Thank you for the patch! Yet something to improve:
Sorry, there're a few duplicated reports around this patch, kindly
ignore similar reports, we will look for the possible issue.

Thanks

> 
> [auto build test ERROR on tip/sched/core]
> [also build test ERROR on arm64/for-next/core tip/auto-latest linus/master v5.6-
> rc4 next-20200305]
> [if your patch is applied to the wrong git tree, please drop us a note to help
> improve the system. BTW, we also suggest to use '--base' option to specify the
> base tree in git format-patch, please see https://stackoverflow.com/a/37406982]
> 
> url:    https://github.com/0day-ci/linux/commits/cl-rock-chips-
> com/wait_task_inactive-spend-too-much-time-on-system-startup/20200305-
> 201639
> base:   https://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git
> a0f03b617c3b2644d3d47bf7d9e60aed01bd5b10
> config: s390-zfcpdump_defconfig (attached as .config)
> compiler: s390-linux-gcc (GCC) 7.5.0
> reproduce:
>         wget https://raw.githubusercontent.com/intel/lkp-
> tests/master/sbin/make.cross -O ~/bin/make.cross
>         chmod +x ~/bin/make.cross
>         # save the attached .config to linux build tree
>         GCC_VERSION=7.5.0 make.cross ARCH=s390
> 
> If you fix the issue, kindly add following tag
> Reported-by: kbuild test robot <lkp@intel.com>
> 
> All errors (new ones prefixed by >>):
> 
>    In file included from include/linux/kvm_host.h:12:0,
>                     from arch/s390/kernel/asm-offsets.c:11:
>    include/linux/sched.h: In function 'set_tsk_going_to_sched':
> >> include/linux/sched.h:1776:27: error: 'TIF_GOING_TO_SCHED' undeclared
> (first use in this function); did you mean 'TIF_SINGLE_STEP'?
>      set_tsk_thread_flag(tsk, TIF_GOING_TO_SCHED);
>                               ^~~~~~~~~~~~~~~~~~
>                               TIF_SINGLE_STEP
>    include/linux/sched.h:1776:27: note: each undeclared identifier is reported only
> once for each function it appears in
>    include/linux/sched.h: In function 'clear_tsk_going_to_sched':
>    include/linux/sched.h:1781:29: error: 'TIF_GOING_TO_SCHED' undeclared (first
> use in this function); did you mean 'TIF_SINGLE_STEP'?
>      clear_tsk_thread_flag(tsk, TIF_GOING_TO_SCHED);
>                                 ^~~~~~~~~~~~~~~~~~
>                                 TIF_SINGLE_STEP
>    In file included from include/linux/kernel.h:11:0,
>                     from include/linux/list.h:9,
>                     from include/linux/preempt.h:11,
>                     from include/linux/hardirq.h:5,
>                     from include/linux/kvm_host.h:7,
>                     from arch/s390/kernel/asm-offsets.c:11:
>    include/linux/sched.h: In function 'test_tsk_going_to_sched':
>    include/linux/sched.h:1786:44: error: 'TIF_GOING_TO_SCHED' undeclared (first
> use in this function); did you mean 'TIF_SINGLE_STEP'?
>      return unlikely(test_tsk_thread_flag(tsk, TIF_GOING_TO_SCHED));
>                                                ^
>    include/linux/compiler.h:78:42: note: in definition of macro 'unlikely'
>     # define unlikely(x) __builtin_expect(!!(x), 0)
>                                              ^
>    make[2]: *** [scripts/Makefile.build:101: arch/s390/kernel/asm-offsets.s] Error 1
>    make[2]: Target '__build' not remade because of errors.
>    make[1]: *** [Makefile:1112: prepare0] Error 2
>    make[1]: Target 'prepare' not remade because of errors.
>    make: *** [Makefile:179: sub-make] Error 2
>    142 real  47 user  83 sys  92.07% cpu 	make prepare
> 
> vim +1776 include/linux/sched.h
> 
>   1773
>   1774	static inline void set_tsk_going_to_sched(struct task_struct *tsk)
>   1775	{
> > 1776		set_tsk_thread_flag(tsk, TIF_GOING_TO_SCHED);
>   1777	}
>   1778
> 
> ---
> 0-DAY CI Kernel Test Service, Intel Corporation
> https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org