diff options
| -rw-r--r-- | include/linux/cpuset.h | 6 | ||||
| -rw-r--r-- | kernel/cpuset.c | 43 | ||||
| -rw-r--r-- | mm/oom_kill.c | 2 |
3 files changed, 16 insertions, 35 deletions
diff --git a/include/linux/cpuset.h b/include/linux/cpuset.h index 9e633ea103ce..ea44d2e768a0 100644 --- a/include/linux/cpuset.h +++ b/include/linux/cpuset.h @@ -45,7 +45,8 @@ static int inline cpuset_zone_allowed_hardwall(struct zone *z, gfp_t gfp_mask) __cpuset_zone_allowed_hardwall(z, gfp_mask); } -extern int cpuset_excl_nodes_overlap(const struct task_struct *p); +extern int cpuset_mems_allowed_intersects(const struct task_struct *tsk1, + const struct task_struct *tsk2); #define cpuset_memory_pressure_bump() \ do { \ @@ -113,7 +114,8 @@ static inline int cpuset_zone_allowed_hardwall(struct zone *z, gfp_t gfp_mask) return 1; } -static inline int cpuset_excl_nodes_overlap(const struct task_struct *p) +static inline int cpuset_mems_allowed_intersects(const struct task_struct *tsk1, + const struct task_struct *tsk2) { return 1; } diff --git a/kernel/cpuset.c b/kernel/cpuset.c index 0864f4097930..2eb2e50db0d6 100644 --- a/kernel/cpuset.c +++ b/kernel/cpuset.c @@ -2506,41 +2506,20 @@ int cpuset_mem_spread_node(void) EXPORT_SYMBOL_GPL(cpuset_mem_spread_node); /** - * cpuset_excl_nodes_overlap - Do we overlap @p's mem_exclusive ancestors? - * @p: pointer to task_struct of some other task. - * - * Description: Return true if the nearest mem_exclusive ancestor - * cpusets of tasks @p and current overlap. Used by oom killer to - * determine if task @p's memory usage might impact the memory - * available to the current task. - * - * Call while holding callback_mutex. + * cpuset_mems_allowed_intersects - Does @tsk1's mems_allowed intersect @tsk2's? + * @tsk1: pointer to task_struct of some task. + * @tsk2: pointer to task_struct of some other task. + * + * Description: Return true if @tsk1's mems_allowed intersects the + * mems_allowed of @tsk2. Used by the OOM killer to determine if + * one of the task's memory usage might impact the memory available + * to the other. **/ -int cpuset_excl_nodes_overlap(const struct task_struct *p) +int cpuset_mems_allowed_intersects(const struct task_struct *tsk1, + const struct task_struct *tsk2) { - const struct cpuset *cs1, *cs2; /* my and p's cpuset ancestors */ - int overlap = 1; /* do cpusets overlap? */ - - task_lock(current); - if (current->flags & PF_EXITING) { - task_unlock(current); - goto done; - } - cs1 = nearest_exclusive_ancestor(current->cpuset); - task_unlock(current); - - task_lock((struct task_struct *)p); - if (p->flags & PF_EXITING) { - task_unlock((struct task_struct *)p); - goto done; - } - cs2 = nearest_exclusive_ancestor(p->cpuset); - task_unlock((struct task_struct *)p); - - overlap = nodes_intersects(cs1->mems_allowed, cs2->mems_allowed); -done: - return overlap; + return nodes_intersects(tsk1->mems_allowed, tsk2->mems_allowed); } /* diff --git a/mm/oom_kill.c b/mm/oom_kill.c index 5c5aa7380bd1..d9bba82923d5 100644 --- a/mm/oom_kill.c +++ b/mm/oom_kill.c @@ -143,7 +143,7 @@ unsigned long badness(struct task_struct *p, unsigned long uptime) * because p may have allocated or otherwise mapped memory on * this node before. However it will be less likely. */ - if (!cpuset_excl_nodes_overlap(p)) + if (!cpuset_mems_allowed_intersects(current, p)) points /= 8; /* |