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SubjectRe: [PATCH] nohz: nohz idle balancing per node
Hi Nicholas,

I love your patch! Yet something to improve:

[auto build test ERROR on linux/master]
[also build test ERROR on linus/master v5.13]
[cannot apply to tip/sched/core next-20210701]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch]

url: https://github.com/0day-ci/linux/commits/Nicholas-Piggin/nohz-nohz-idle-balancing-per-node/20210701-135507
base: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git c54b245d011855ea91c5beff07f1db74143ce614
config: x86_64-randconfig-a016-20210630 (attached as .config)
compiler: clang version 13.0.0 (https://github.com/llvm/llvm-project e7e71e9454ed76c1b3d8140170b5333c28bef1be)
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
# https://github.com/0day-ci/linux/commit/1bede18329ddbaed4099e980fdf62092ff881932
git remote add linux-review https://github.com/0day-ci/linux
git fetch --no-tags linux-review Nicholas-Piggin/nohz-nohz-idle-balancing-per-node/20210701-135507
git checkout 1bede18329ddbaed4099e980fdf62092ff881932
# save the attached .config to linux build tree
mkdir build_dir
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross O=build_dir ARCH=x86_64 SHELL=/bin/bash

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@intel.com>

All errors (new ones prefixed by >>):

>> kernel/sched/fair.c:11590:30: error: use of undeclared identifier 'housekeeping_overridden'
if (static_branch_unlikely(&housekeeping_overridden)) {
^
>> kernel/sched/fair.c:11590:30: error: use of undeclared identifier 'housekeeping_overridden'
>> kernel/sched/fair.c:11590:30: error: use of undeclared identifier 'housekeeping_overridden'
>> kernel/sched/fair.c:11590:30: error: use of undeclared identifier 'housekeeping_overridden'
>> kernel/sched/fair.c:11590:30: error: use of undeclared identifier 'housekeeping_overridden'
>> kernel/sched/fair.c:11590:30: error: use of undeclared identifier 'housekeeping_overridden'
>> kernel/sched/fair.c:11590:30: error: use of undeclared identifier 'housekeeping_overridden'
>> kernel/sched/fair.c:11590:30: error: use of undeclared identifier 'housekeeping_overridden'
>> kernel/sched/fair.c:11590:30: error: use of undeclared identifier 'housekeeping_overridden'
>> kernel/sched/fair.c:11590:30: error: use of undeclared identifier 'housekeeping_overridden'
>> kernel/sched/fair.c:11590:30: error: use of undeclared identifier 'housekeeping_overridden'
>> kernel/sched/fair.c:11590:30: error: use of undeclared identifier 'housekeeping_overridden'
>> kernel/sched/fair.c:11590:30: error: use of undeclared identifier 'housekeeping_overridden'
>> kernel/sched/fair.c:11590:30: error: use of undeclared identifier 'housekeeping_overridden'
>> kernel/sched/fair.c:11590:30: error: use of undeclared identifier 'housekeeping_overridden'
>> kernel/sched/fair.c:11590:30: error: use of undeclared identifier 'housekeeping_overridden'
>> kernel/sched/fair.c:11590:30: error: use of undeclared identifier 'housekeeping_overridden'
>> kernel/sched/fair.c:11590:30: error: use of undeclared identifier 'housekeeping_overridden'
>> kernel/sched/fair.c:11590:30: error: use of undeclared identifier 'housekeeping_overridden'
fatal error: too many errors emitted, stopping now [-ferror-limit=]
20 errors generated.


vim +/housekeeping_overridden +11590 kernel/sched/fair.c

11583
11584 __init void init_sched_fair_class(void)
11585 {
11586 #ifdef CONFIG_SMP
11587 open_softirq(SCHED_SOFTIRQ, run_rebalance_domains);
11588
11589 #ifdef CONFIG_NO_HZ_COMMON
11590 if (static_branch_unlikely(&housekeeping_overridden)) {
11591 struct nohz *nohz;
11592
11593 nohz_nodes = kcalloc(1, sizeof(struct nohz *), GFP_NOWAIT);
11594 nohz = kmalloc(sizeof(struct nohz), GFP_NOWAIT);
11595 nohz->next_balance = jiffies;
11596 nohz->next_blocked = jiffies;
11597 zalloc_cpumask_var(&nohz->idle_cpus_mask, GFP_NOWAIT);
11598 nohz_nodes[0] = nohz;
11599 } else {
11600 int n;
11601
11602 nohz_nodes = kcalloc(nr_node_ids, sizeof(struct nohz *), GFP_NOWAIT);
11603 for_each_node(n) {
11604 struct nohz *nohz;
11605
11606 nohz = kmalloc_node(sizeof(struct nohz), GFP_NOWAIT, n);
11607 nohz->next_balance = jiffies;
11608 nohz->next_blocked = jiffies;
11609 zalloc_cpumask_var_node(&nohz->idle_cpus_mask, GFP_NOWAIT, n);
11610 nohz_nodes[n] = nohz;
11611 }
11612 }
11613 #endif
11614 #endif /* SMP */
11615

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