C++ (Cpp) oom_scan_process_thread Examples

Example #1

File: oom_kill.c Project: NhlalukoG/android_kernel_samsung_goyave3g

/*
 * Simple selection loop. We chose the process with the highest
 * number of 'points'.
 *
 * (not docbooked, we don't want this one cluttering up the manual)
 */
static struct task_struct *select_bad_process(unsigned int *ppoints,
		unsigned long totalpages, const nodemask_t *nodemask,
		bool force_kill)
{
	struct task_struct *g, *p;
	struct task_struct *chosen = NULL;
	unsigned long chosen_points = 0;

	rcu_read_lock();
	do_each_thread(g, p) {
		unsigned int points;

		switch (oom_scan_process_thread(p, totalpages, nodemask,
						force_kill)) {
		case OOM_SCAN_SELECT:
			chosen = p;
			chosen_points = ULONG_MAX;
			/* fall through */
		case OOM_SCAN_CONTINUE:
			continue;
		case OOM_SCAN_ABORT:
			rcu_read_unlock();
			return ERR_PTR(-1UL);
		case OOM_SCAN_OK:
			break;
		};
		points = oom_badness(p, NULL, nodemask, totalpages);
		if (points > chosen_points) {
			chosen = p;
			chosen_points = points;
		}
	} while_each_thread(g, p);

Example #2

File: oom_kill.c Project: kandycs/linux

/*
 * Simple selection loop. We chose the process with the highest
 * number of 'points'.  Returns -1 on scan abort.
 */
static struct task_struct *select_bad_process(struct oom_control *oc,
		unsigned int *ppoints, unsigned long totalpages)
{
	struct task_struct *g, *p;
	struct task_struct *chosen = NULL;
	unsigned long chosen_points = 0;

	rcu_read_lock();
	for_each_process_thread(g, p) {
		unsigned int points;

		switch (oom_scan_process_thread(oc, p, totalpages)) {
		case OOM_SCAN_SELECT:
			chosen = p;
			chosen_points = ULONG_MAX;
			/* fall through */
		case OOM_SCAN_CONTINUE:
			continue;
		case OOM_SCAN_ABORT:
			rcu_read_unlock();
			return (struct task_struct *)(-1UL);
		case OOM_SCAN_OK:
			break;
		};
		points = oom_badness(p, NULL, oc->nodemask, totalpages);
		if (!points || points < chosen_points)
			continue;
		/* Prefer thread group leaders for display purposes */
		if (points == chosen_points && thread_group_leader(chosen))
			continue;

		chosen = p;
		chosen_points = points;
	}

Example #3

File: oom_kill.c Project: djmax81/android_kernel_samsung_exynos5433_LL

/*
 * Simple selection loop. We chose the process with the highest
 * number of 'points'.
 *
 * (not docbooked, we don't want this one cluttering up the manual)
 */
static struct task_struct *select_bad_process_low(unsigned int *ppoints,
		unsigned long totalpages, const nodemask_t *nodemask,
		bool force_kill)
{
	struct task_struct *g, *p;
	struct task_struct *chosen = NULL;
	unsigned long chosen_points = 0;

#ifdef CONFIG_OOM_SCAN_WA_PREVENT_WRONG_SEARCH
	bool skip_search_thread = false;
#endif

	rcu_read_lock();
	do_each_thread(g, p) {
		unsigned int points;
#ifdef CONFIG_OOM_SCAN_WA_PREVENT_WRONG_SEARCH
		skip_search_thread = false;
#endif
		switch (oom_scan_process_thread(p, totalpages, nodemask,
						force_kill)) {
		case OOM_SCAN_SELECT:
			chosen = p;
			chosen_points = ULONG_MAX;
			/* fall through */
		case OOM_SCAN_CONTINUE:
			continue;
		case OOM_SCAN_ABORT:
			rcu_read_unlock();
			return ERR_PTR(-1UL);
#ifdef CONFIG_OOM_SCAN_WA_PREVENT_WRONG_SEARCH
		case OOM_SCAN_SKIP_SEARCH_THREAD:
			skip_search_thread = true;
			/* fall through */
#endif
		case OOM_SCAN_OK:
			break;
		};

#ifdef CONFIG_OOM_SCAN_WA_PREVENT_WRONG_SEARCH
		if(skip_search_thread)
			break;
#endif
		points = oom_badness_low(p, NULL, nodemask, totalpages);
		if (points > chosen_points) {
			chosen = p;
			chosen_points = points;
		}
	} while_each_thread(g, p);

Example #4

File: oom_kill.c Project: 513855417/linux

/*
 * Simple selection loop. We chose the process with the highest
 * number of 'points'.  Returns -1 on scan abort.
 */
static struct task_struct *select_bad_process(struct oom_control *oc,
		unsigned int *ppoints, unsigned long totalpages)
{
	struct task_struct *p;
	struct task_struct *chosen = NULL;
	unsigned long chosen_points = 0;

	rcu_read_lock();
	for_each_process(p) {
		unsigned int points;

		switch (oom_scan_process_thread(oc, p, totalpages)) {
		case OOM_SCAN_SELECT:
			chosen = p;
			chosen_points = ULONG_MAX;
			/* fall through */
		case OOM_SCAN_CONTINUE:
			continue;
		case OOM_SCAN_ABORT:
			rcu_read_unlock();
			return (struct task_struct *)(-1UL);
		case OOM_SCAN_OK:
			break;
		};
		points = oom_badness(p, NULL, oc->nodemask, totalpages);
		if (!points || points < chosen_points)
			continue;

		chosen = p;
		chosen_points = points;
	}
	if (chosen)
		get_task_struct(chosen);
	rcu_read_unlock();

	*ppoints = chosen_points * 1000 / totalpages;
	return chosen;
}