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Commit 4fde846a authored by Linus Torvalds's avatar Linus Torvalds
Browse files

Merge branch 'sched-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 

Pull scheduler fixes from Thomas Gleixner:
 "This scheduler update provides:

   - The (hopefully) final fix for the vtime accounting issues which
     were around for quite some time

   - Use types known to user space in UAPI headers to unbreak user space
     builds

   - Make load balancing respect the current scheduling domain again
     instead of evaluating unrelated CPUs"

* 'sched-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  sched/headers/uapi: Fix linux/sched/types.h userspace compilation errors
  sched/fair: Fix load_balance() affinity redo path
  sched/cputime: Accumulate vtime on top of nsec clocksource
  sched/cputime: Move the vtime task fields to their own struct
  sched/cputime: Rename vtime fields
  sched/cputime: Always set tsk->vtime_snap_whence after accounting vtime
  vtime, sched/cputime: Remove vtime_account_user()
  Revert "sched/cputime: Refactor the cputime_adjust() code"
parents c3931a87 242fc352

include/linux/init_task.h

+3 −3
Original line number Diff line number Diff line
@@ -170,9 +170,9 @@ extern struct cred init_cred; 


#ifdef CONFIG_VIRT_CPU_ACCOUNTING_GEN

# define INIT_VTIME(tsk)						\

	.vtime_seqcount = SEQCNT_ZERO(tsk.vtime_seqcount),	\

	.vtime_snap = 0,				\

	.vtime_snap_whence = VTIME_SYS,

	.vtime.seqcount = SEQCNT_ZERO(tsk.vtime.seqcount),		\

	.vtime.starttime = 0,						\

	.vtime.state = VTIME_SYS,

#else

# define INIT_VTIME(tsk)

#endif

include/linux/sched.h

+19 −10
Original line number Diff line number Diff line
@@ -223,6 +223,24 @@ struct task_cputime { 
#define prof_exp			stime

#define sched_exp			sum_exec_runtime



enum vtime_state {

	/* Task is sleeping or running in a CPU with VTIME inactive: */

	VTIME_INACTIVE = 0,

	/* Task runs in userspace in a CPU with VTIME active: */

	VTIME_USER,

	/* Task runs in kernelspace in a CPU with VTIME active: */

	VTIME_SYS,

};



struct vtime {

	seqcount_t		seqcount;

	unsigned long long	starttime;

	enum vtime_state	state;

	u64			utime;

	u64			stime;

	u64			gtime;

};



struct sched_info {

#ifdef CONFIG_SCHED_INFO

	/* Cumulative counters: */
@@ -688,16 +706,7 @@ struct task_struct { 
	u64				gtime;

	struct prev_cputime		prev_cputime;

#ifdef CONFIG_VIRT_CPU_ACCOUNTING_GEN

	seqcount_t			vtime_seqcount;

	unsigned long long		vtime_snap;

	enum {

		/* Task is sleeping or running in a CPU with VTIME inactive: */

		VTIME_INACTIVE = 0,

		/* Task runs in userspace in a CPU with VTIME active: */

		VTIME_USER,

		/* Task runs in kernelspace in a CPU with VTIME active: */

		VTIME_SYS,

	} vtime_snap_whence;

	struct vtime			vtime;

#endif



#ifdef CONFIG_NO_HZ_FULL

include/linux/vtime.h

+1 −8
Original line number Diff line number Diff line
@@ -67,19 +67,12 @@ static inline void vtime_account_system(struct task_struct *tsk) { } 


#ifdef CONFIG_VIRT_CPU_ACCOUNTING_GEN

extern void arch_vtime_task_switch(struct task_struct *tsk);

extern void vtime_account_user(struct task_struct *tsk);

extern void vtime_user_enter(struct task_struct *tsk);



static inline void vtime_user_exit(struct task_struct *tsk)

{

	vtime_account_user(tsk);

}



extern void vtime_user_exit(struct task_struct *tsk);

extern void vtime_guest_enter(struct task_struct *tsk);

extern void vtime_guest_exit(struct task_struct *tsk);

extern void vtime_init_idle(struct task_struct *tsk, int cpu);

#else /* !CONFIG_VIRT_CPU_ACCOUNTING_GEN  */

static inline void vtime_account_user(struct task_struct *tsk) { }

static inline void vtime_user_enter(struct task_struct *tsk) { }

static inline void vtime_user_exit(struct task_struct *tsk) { }

static inline void vtime_guest_enter(struct task_struct *tsk) { }

include/uapi/linux/sched/types.h

+8 −8
Original line number Diff line number Diff line
@@ -54,21 +54,21 @@ struct sched_param { 
 * available in the scheduling class file or in Documentation/.

 */

struct sched_attr {

	u32 size;

	__u32 size;



	u32 sched_policy;

	u64 sched_flags;

	__u32 sched_policy;

	__u64 sched_flags;



	/* SCHED_NORMAL, SCHED_BATCH */

	s32 sched_nice;

	__s32 sched_nice;



	/* SCHED_FIFO, SCHED_RR */

	u32 sched_priority;

	__u32 sched_priority;



	/* SCHED_DEADLINE */

	u64 sched_runtime;

	u64 sched_deadline;

	u64 sched_period;

	__u64 sched_runtime;

	__u64 sched_deadline;

	__u64 sched_period;

};



#endif /* _UAPI_LINUX_SCHED_TYPES_H */

kernel/fork.c

+3 −3
Original line number Diff line number Diff line
@@ -1637,9 +1637,9 @@ static __latent_entropy struct task_struct *copy_process( 
	prev_cputime_init(&p->prev_cputime);



#ifdef CONFIG_VIRT_CPU_ACCOUNTING_GEN

	seqcount_init(&p->vtime_seqcount);

	p->vtime_snap = 0;

	p->vtime_snap_whence = VTIME_INACTIVE;

	seqcount_init(&p->vtime.seqcount);

	p->vtime.starttime = 0;

	p->vtime.state = VTIME_INACTIVE;

#endif



#if defined(SPLIT_RSS_COUNTING)