Re: [RFC PATCH] sched_pair_cpu: Introduce scheduler task pairing system call

Tuesday, 16 June 2020

Hi Mathieu,

[FYI, it's a private test report for your RFC patch.]
[auto build test ERROR on tip/x86/asm]
[also build test ERROR on tip/sched/core]
[cannot apply to linus/master linux/master v5.8-rc1 next-20200616]
[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/Mathieu-Desnoyers/sched_pair_cpu...
base:   https://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git
2ce0d7f9766f0e49bb54f149c77bae89464932fb
config: x86_64-allnoconfig (attached as .config)
compiler: clang version 11.0.0 (https://github.com/llvm/llvm-project
487ca07fcc75d52755c9fe2ee05bcb3b6eeeec44)
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 x86_64 cross compiling tool for clang build
        # apt-get install binutils-x86-64-linux-gnu
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=x86_64 

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp(a)intel.com&gt;

All errors (new ones prefixed by >>, old ones prefixed by <<):

In file included from arch/x86/kernel/asm-offsets.c:9:
In file included from include/linux/crypto.h:21:
In file included from include/linux/uaccess.h:5:
...
> include/linux/sched.h:1913:15: error: no member named
'pair_cpu' in 'struct task_struct' if (current->pair_cpu >=
0)
~~~~~~~  ^
include/linux/sched.h:1928:15: error: no member named 'pair_cpu' in 'struct
task_struct'
if (current->pair_cpu >= 0)
~~~~~~~  ^
include/linux/sched.h:1938:5: error: no member named 'pair_cpu' in 'struct
task_struct'
t->pair_cpu = -1;
~  ^
...
> include/linux/sched.h:1939:5: error: no member named
'pair_cpu_need_worker' in 'struct task_struct'
t->pair_cpu_need_worker = 0;
~  ^
...
> include/linux/sched.h:1940:5: error: no member named
'pair_cpu_worker_active' in 'struct task_struct'
t->pair_cpu_worker_active = 0;
~  ^
...
> include/linux/sched.h:1941:5: error: no member named
'pair_cpu_queued_work' in 'struct task_struct'
t->pair_cpu_queued_work = 0;
~  ^
...
> include/linux/sched.h:1942:13: error: no member named
'pair_cpu_work' in 'struct task_struct'
memset(&t->pair_cpu_work, 0, sizeof(t->pair_cpu_work));
~  ^
include/linux/sched.h:1942:41: error: no member named 'pair_cpu_work' in
'struct task_struct'
memset(&t->pair_cpu_work, 0, sizeof(t->pair_cpu_work));
~  ^
In file included from arch/x86/kernel/asm-offsets.c:13:
In file included from include/linux/suspend.h:5:
In file included from include/linux/swap.h:9:
In file included from include/linux/memcontrol.h:13:
In file included from include/linux/cgroup.h:17:
In file included from include/linux/fs.h:34:
In file included from include/linux/percpu-rwsem.h:7:
In file included from include/linux/rcuwait.h:6:
In file included from include/linux/sched/signal.h:6:
include/linux/signal.h:87:11: warning: array index 3 is past the end of the array (which
contains 1 element) [-Warray-bounds]
return (set->sig[3] | set->sig[2] |
^        ~
arch/x86/include/asm/signal.h:24:2: note: array 'sig' declared here
unsigned long sig[_NSIG_WORDS];
^
In file included from arch/x86/kernel/asm-offsets.c:13:
In file included from include/linux/suspend.h:5:
In file included from include/linux/swap.h:9:
In file included from include/linux/memcontrol.h:13:
In file included from include/linux/cgroup.h:17:
In file included from include/linux/fs.h:34:
In file included from include/linux/percpu-rwsem.h:7:
In file included from include/linux/rcuwait.h:6:
In file included from include/linux/sched/signal.h:6:
include/linux/signal.h:87:25: warning: array index 2 is past the end of the array (which
contains 1 element) [-Warray-bounds]
return (set->sig[3] | set->sig[2] |
^        ~
arch/x86/include/asm/signal.h:24:2: note: array 'sig' declared here
unsigned long sig[_NSIG_WORDS];
^
In file included from arch/x86/kernel/asm-offsets.c:13:
In file included from include/linux/suspend.h:5:
In file included from include/linux/swap.h:9:
In file included from include/linux/memcontrol.h:13:
In file included from include/linux/cgroup.h:17:
In file included from include/linux/fs.h:34:
In file included from include/linux/percpu-rwsem.h:7:
In file included from include/linux/rcuwait.h:6:
In file included from include/linux/sched/signal.h:6:
include/linux/signal.h:88:4: warning: array index 1 is past the end of the array (which
contains 1 element) [-Warray-bounds]
set->sig[1] | set->sig[0]) == 0;
^        ~
arch/x86/include/asm/signal.h:24:2: note: array 'sig' declared here
unsigned long sig[_NSIG_WORDS];
^
In file included from arch/x86/kernel/asm-offsets.c:13:
In file included from include/linux/suspend.h:5:
In file included from include/linux/swap.h:9:
In file included from include/linux/memcontrol.h:13:
In file included from include/linux/cgroup.h:17:
In file included from include/linux/fs.h:34:
In file included from include/linux/percpu-rwsem.h:7:
In file included from include/linux/rcuwait.h:6:
In file included from include/linux/sched/signal.h:6:
include/linux/signal.h:90:11: warning: array index 1 is past the end of the array (which
contains 1 element) [-Warray-bounds]
return (set->sig[1] | set->sig[0]) == 0;
^        ~
arch/x86/include/asm/signal.h:24:2: note: array 'sig' declared here
unsigned long sig[_NSIG_WORDS];
^
In file included from arch/x86/kernel/asm-offsets.c:13:
In file included from include/linux/suspend.h:5:
In file included from include/linux/swap.h:9:
In file included from include/linux/memcontrol.h:13:
In file included from include/linux/cgroup.h:17:
In file included from include/linux/fs.h:34:
In file included from include/linux/percpu-rwsem.h:7:
In file included from include/linux/rcuwait.h:6:
In file included from include/linux/sched/signal.h:6:
include/linux/signal.h:103:11: warning: array index 3 is past the end of the array (which
contains 1 element) [-Warray-bounds]
return  (set1->sig[3] == set2->sig[3]) &&
^         ~
arch/x86/include/asm/signal.h:24:2: note: array 'sig' declared here
unsigned long sig[_NSIG_WORDS];
^
In file included from arch/x86/kernel/asm-offsets.c:13:
In file included from include/linux/suspend.h:5:
In file included from include/linux/swap.h:9:
In file included from include/linux/memcontrol.h:13:
In file included from include/linux/cgroup.h:17:
In file included from include/linux/fs.h:34:
In file included from include/linux/percpu-rwsem.h:7:
In file included from include/linux/rcuwait.h:6:
In file included from include/linux/sched/signal.h:6:
include/linux/signal.h:103:27: warning: array index 3 is past the end of the array (which
contains 1 element) [-Warray-bounds]
return  (set1->sig[3] == set2->sig[3]) &&
^         ~
arch/x86/include/asm/signal.h:24:2: note: array 'sig' declared here
unsigned long sig[_NSIG_WORDS];
^
In file included from arch/x86/kernel/asm-offsets.c:13:
In file included from include/linux/suspend.h:5:
In file included from include/linux/swap.h:9:
In file included from include/linux/memcontrol.h:13:
In file included from include/linux/cgroup.h:17:

vim +1913 include/linux/sched.h

  1910	
  1911	static inline void sched_pair_cpu_set_notify_resume(struct task_struct *t)
  1912	{
...
 1913		if (current->pair_cpu >= 0)  
1914			set_tsk_thread_flag(t, TIF_NOTIFY_RESUME);
  1915	}
  1916	
  1917	static inline void sched_pair_cpu_preempt(struct task_struct *t)
  1918	{
  1919		sched_pair_cpu_set_notify_resume(t);
  1920	}
  1921	
  1922	void __sched_pair_cpu_handle_notify_resume(struct ksignal *sig,
  1923						   struct pt_regs *regs);
  1924	
  1925	static inline void sched_pair_cpu_handle_notify_resume(struct ksignal *ksig,
  1926							       struct pt_regs *regs)
  1927	{
  1928		if (current->pair_cpu >= 0)
  1929			__sched_pair_cpu_handle_notify_resume(ksig, regs);
  1930	}
  1931	
  1932	/*
  1933	 * Clear paired cpu on clone.
  1934	 */
  1935	static inline void sched_pair_cpu_fork(struct task_struct *t,
  1936					       unsigned long clone_flags)
  1937	{
  1938		t->pair_cpu = -1;
...
 1939		t->pair_cpu_need_worker = 0;
 1940		t->pair_cpu_worker_active = 0;
 1941		t->pair_cpu_queued_work = 0;
 1942		memset(&t->pair_cpu_work, 0, sizeof(t->pair_cpu_work));   1943	}
  1944	

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org

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