Re: [RFC PATCH 1/2] Prevent CFS from ignoring boost requests from KVM

[kernel test robot <lkp@intel.com>]

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Hi Kenta,

[FYI, it's a private test report for your RFC patch.]
[auto build test WARNING on tip/sched/core]
[also build test WARNING on linux/master linus/master v5.12-rc8 next-20210421]
[cannot apply to kvm/queue]
[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/Kenta-Ishiguro/Mitigating-Excessive-Pause-Loop-Exiting-in-VM-Agnostic-KVM/20210421-234914
base:   https://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git 3f5ad91488e813026f8c5f46b839e91a83912703
config: x86_64-randconfig-s022-20210421 (attached as .config)
compiler: gcc-9 (Debian 9.3.0-22) 9.3.0
reproduce:
        # apt-get install sparse
        # sparse version: v0.6.3-341-g8af24329-dirty
        # https://github.com/0day-ci/linux/commit/b803c1316e4fd9a6781869b66566f28bef3c97f4
        git remote add linux-review https://github.com/0day-ci/linux
        git fetch --no-tags linux-review Kenta-Ishiguro/Mitigating-Excessive-Pause-Loop-Exiting-in-VM-Agnostic-KVM/20210421-234914
        git checkout b803c1316e4fd9a6781869b66566f28bef3c97f4
        # save the attached .config to linux build tree
        make W=1 C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' W=1 ARCH=x86_64 

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


sparse warnings: (new ones prefixed by >>)
   kernel/sched/fair.c:876:34: sparse: sparse: incorrect type in argument 1 (different address spaces) @@     expected struct sched_entity *se @@     got struct sched_entity [noderef] __rcu * @@
   kernel/sched/fair.c:876:34: sparse:     expected struct sched_entity *se
   kernel/sched/fair.c:876:34: sparse:     got struct sched_entity [noderef] __rcu *
   kernel/sched/fair.c:10662:9: sparse: sparse: incorrect type in assignment (different address spaces) @@     expected struct sched_domain *[assigned] sd @@     got struct sched_domain [noderef] __rcu *parent @@
   kernel/sched/fair.c:10662:9: sparse:     expected struct sched_domain *[assigned] sd
   kernel/sched/fair.c:10662:9: sparse:     got struct sched_domain [noderef] __rcu *parent
   kernel/sched/fair.c:4931:22: sparse: sparse: incompatible types in comparison expression (different address spaces):
   kernel/sched/fair.c:4931:22: sparse:    struct task_struct [noderef] __rcu *
   kernel/sched/fair.c:4931:22: sparse:    struct task_struct *
   kernel/sched/fair.c:5454:38: sparse: sparse: incorrect type in initializer (different address spaces) @@     expected struct task_struct *curr @@     got struct task_struct [noderef] __rcu *curr @@
   kernel/sched/fair.c:5454:38: sparse:     expected struct task_struct *curr
   kernel/sched/fair.c:5454:38: sparse:     got struct task_struct [noderef] __rcu *curr
   kernel/sched/fair.c:6680:20: sparse: sparse: incorrect type in assignment (different address spaces) @@     expected struct sched_domain *[assigned] sd @@     got struct sched_domain [noderef] __rcu *parent @@
   kernel/sched/fair.c:6680:20: sparse:     expected struct sched_domain *[assigned] sd
   kernel/sched/fair.c:6680:20: sparse:     got struct sched_domain [noderef] __rcu *parent
   kernel/sched/fair.c:6802:9: sparse: sparse: incorrect type in assignment (different address spaces) @@     expected struct sched_domain *[assigned] tmp @@     got struct sched_domain [noderef] __rcu *parent @@
   kernel/sched/fair.c:6802:9: sparse:     expected struct sched_domain *[assigned] tmp
   kernel/sched/fair.c:6802:9: sparse:     got struct sched_domain [noderef] __rcu *parent
   kernel/sched/fair.c:7000:38: sparse: sparse: incorrect type in initializer (different address spaces) @@     expected struct task_struct *curr @@     got struct task_struct [noderef] __rcu *curr @@
   kernel/sched/fair.c:7000:38: sparse:     expected struct task_struct *curr
   kernel/sched/fair.c:7000:38: sparse:     got struct task_struct [noderef] __rcu *curr
   kernel/sched/fair.c:7251:38: sparse: sparse: incorrect type in initializer (different address spaces) @@     expected struct task_struct *curr @@     got struct task_struct [noderef] __rcu *curr @@
   kernel/sched/fair.c:7251:38: sparse:     expected struct task_struct *curr
   kernel/sched/fair.c:7251:38: sparse:     got struct task_struct [noderef] __rcu *curr
>> kernel/sched/fair.c:7318:14: sparse: sparse: incorrect type in assignment (different address spaces) @@     expected struct task_struct *curr @@     got struct task_struct [noderef] __rcu *curr @@
   kernel/sched/fair.c:7318:14: sparse:     expected struct task_struct *curr
   kernel/sched/fair.c:7318:14: sparse:     got struct task_struct [noderef] __rcu *curr
   kernel/sched/fair.c:8276:40: sparse: sparse: incorrect type in initializer (different address spaces) @@     expected struct sched_domain *child @@     got struct sched_domain [noderef] __rcu *child @@
   kernel/sched/fair.c:8276:40: sparse:     expected struct sched_domain *child
   kernel/sched/fair.c:8276:40: sparse:     got struct sched_domain [noderef] __rcu *child
   kernel/sched/fair.c:8724:22: sparse: sparse: incompatible types in comparison expression (different address spaces):
   kernel/sched/fair.c:8724:22: sparse:    struct task_struct [noderef] __rcu *
   kernel/sched/fair.c:8724:22: sparse:    struct task_struct *
   kernel/sched/fair.c:9984:9: sparse: sparse: incorrect type in assignment (different address spaces) @@     expected struct sched_domain *[assigned] sd @@     got struct sched_domain [noderef] __rcu *parent @@
   kernel/sched/fair.c:9984:9: sparse:     expected struct sched_domain *[assigned] sd
   kernel/sched/fair.c:9984:9: sparse:     got struct sched_domain [noderef] __rcu *parent
   kernel/sched/fair.c:9643:44: sparse: sparse: incorrect type in initializer (different address spaces) @@     expected struct sched_domain *sd_parent @@     got struct sched_domain [noderef] __rcu *parent @@
   kernel/sched/fair.c:9643:44: sparse:     expected struct sched_domain *sd_parent
   kernel/sched/fair.c:9643:44: sparse:     got struct sched_domain [noderef] __rcu *parent
   kernel/sched/fair.c:10056:9: sparse: sparse: incorrect type in assignment (different address spaces) @@     expected struct sched_domain *[assigned] sd @@     got struct sched_domain [noderef] __rcu *parent @@
   kernel/sched/fair.c:10056:9: sparse:     expected struct sched_domain *[assigned] sd
   kernel/sched/fair.c:10056:9: sparse:     got struct sched_domain [noderef] __rcu *parent
   kernel/sched/fair.c:4599:31: sparse: sparse: marked inline, but without a definition
   kernel/sched/fair.c: note: in included file:
   kernel/sched/sched.h:1729:25: sparse: sparse: incompatible types in comparison expression (different address spaces):
   kernel/sched/sched.h:1729:25: sparse:    struct task_struct [noderef] __rcu *
   kernel/sched/sched.h:1729:25: sparse:    struct task_struct *
   kernel/sched/sched.h:1884:9: sparse: sparse: incompatible types in comparison expression (different address spaces):
   kernel/sched/sched.h:1884:9: sparse:    struct task_struct [noderef] __rcu *
   kernel/sched/sched.h:1884:9: sparse:    struct task_struct *
   kernel/sched/sched.h:1729:25: sparse: sparse: incompatible types in comparison expression (different address spaces):
   kernel/sched/sched.h:1729:25: sparse:    struct task_struct [noderef] __rcu *
   kernel/sched/sched.h:1729:25: sparse:    struct task_struct *
   kernel/sched/sched.h:1729:25: sparse: sparse: incompatible types in comparison expression (different address spaces):
   kernel/sched/sched.h:1729:25: sparse:    struct task_struct [noderef] __rcu *
   kernel/sched/sched.h:1729:25: sparse:    struct task_struct *

vim +7318 kernel/sched/fair.c

  7304	
  7305	static bool yield_to_task_fair(struct rq *rq, struct task_struct *p)
  7306	{
  7307		struct sched_entity *se = &p->se;
  7308		struct task_struct *curr;
  7309		struct sched_entity *yield_se;
  7310	
  7311		/* throttled hierarchies are not runnable */
  7312		if (!se->on_rq || throttled_hierarchy(cfs_rq_of(se)))
  7313			return false;
  7314	
  7315		/* Tell the scheduler that we'd really like pse to run next. */
  7316		set_next_buddy(se);
  7317	
> 7318		curr = rq->curr;
  7319		yield_se = &curr->se;
  7320		deboost_yield_task(se, yield_se);
  7321	
  7322		yield_task_fair(rq);
  7323	
  7324		return true;
  7325	}
  7326	

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

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