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sched/fair: Kill task_struct::numa_entry and numa_group::task_list

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Nobody iterates over numa_group::task_list, this just confuses the readers.

Signed-off-by: Kirill Tkhai <ktkhai@parallels.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Link: http://lkml.kernel.org/r/1415358456.28592.17.camel@tkhai
Signed-off-by: Ingo Molnar <mingo@kernel.org>
This commit is contained in:
Kirill Tkhai 2014-11-07 14:07:36 +03:00 committed by Ingo Molnar
parent e9ac5f0fa8
commit 753899183c
2 changed files with 0 additions and 6 deletions
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1
kernel/sched/core.c
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@ -1861,7 +1861,6 @@ static void __sched_fork(unsigned long clone_flags, struct task_struct *p)
p->last_task_numa_placement = 0;
p->last_sum_exec_runtime = 0;
INIT_LIST_HEAD(&p->numa_entry);
p->numa_group = NULL;
#endif /* CONFIG_NUMA_BALANCING */
}

5
kernel/sched/fair.c
View File

@ -873,7 +873,6 @@ struct numa_group {
spinlock_t lock; /* nr_tasks, tasks */
int nr_tasks;
pid_t gid;
struct list_head task_list;
struct rcu_head rcu;
nodemask_t active_nodes;
@ -1906,7 +1905,6 @@ static void task_numa_group(struct task_struct *p, int cpupid, int flags,
atomic_set(&grp->refcount, 1);
spin_lock_init(&grp->lock);
INIT_LIST_HEAD(&grp->task_list);
grp->gid = p->pid;
/* Second half of the array tracks nids where faults happen */
grp->faults_cpu = grp->faults + NR_NUMA_HINT_FAULT_TYPES *
@ -1919,7 +1917,6 @@ static void task_numa_group(struct task_struct *p, int cpupid, int flags,
grp->total_faults = p->total_numa_faults;
list_add(&p->numa_entry, &grp->task_list);
grp->nr_tasks++;
rcu_assign_pointer(p->numa_group, grp);
}
@ -1980,7 +1977,6 @@ static void task_numa_group(struct task_struct *p, int cpupid, int flags,
my_grp->total_faults -= p->total_numa_faults;
grp->total_faults += p->total_numa_faults;
list_move(&p->numa_entry, &grp->task_list);
my_grp->nr_tasks--;
grp->nr_tasks++;
@ -2010,7 +2006,6 @@ void task_numa_free(struct task_struct *p)
grp->faults[i] -= p->numa_faults[i];
grp->total_faults -= p->total_numa_faults;
list_del(&p->numa_entry);
grp->nr_tasks--;
spin_unlock_irqrestore(&grp->lock, flags);
RCU_INIT_POINTER(p->numa_group, NULL);