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Commit a632490c authored by Charan Teja Reddy's avatar Charan Teja Reddy
Browse files

kernel: trigger lmkd specific triggers during emergency 



Ensure that only LMKD registered triggers gets an event during the
manual generation of emergency trigger.

Change-Id: Ibb0bf447ae225ddacdad809ba3418ed33c47980a
Signed-off-by: default avatarCharan Teja Reddy <charante@codeaurora.org>
parent adc5c327

include/linux/oom.h

+1 −0
Original line number Diff line number Diff line
@@ -135,4 +135,5 @@ extern int sysctl_reap_mem_on_sigkill; 


/* calls for LMK reaper */

extern void add_to_oom_reaper(struct task_struct *p);

#define ULMK_MAGIC "lmkd"

#endif /* _INCLUDE_LINUX_OOM_H */

include/linux/psi_types.h

+3 −0
Original line number Diff line number Diff line
@@ -123,6 +123,9 @@ struct psi_trigger { 


	/* Refcounting to prevent premature destruction */

	struct kref refcount;



	/* Task that created the trigger */

	char comm[TASK_COMM_LEN];

};



struct psi_group {

kernel/sched/psi.c

+4 −0
Original line number Diff line number Diff line
@@ -140,6 +140,7 @@ 
#include <linux/file.h>

#include <linux/poll.h>

#include <linux/psi.h>

#include <linux/oom.h>

#include "sched.h"



#define CREATE_TRACE_POINTS
@@ -603,6 +604,8 @@ void psi_emergency_trigger(void) 
		return;



	list_for_each_entry(t, &group->triggers, node) {

		if (strcmp(t->comm, ULMK_MAGIC))

			continue;

		trace_psi_event(t->state, t->threshold);



		/* Generate an event */
@@ -1112,6 +1115,7 @@ struct psi_trigger *psi_trigger_create(struct psi_group *group, 
	t->last_event_time = 0;

	init_waitqueue_head(&t->event_wait);

	kref_init(&t->refcount);

	get_task_comm(t->comm, current);



	mutex_lock(&group->trigger_lock);

mm/oom_kill.c

+0 −2
Original line number Diff line number Diff line
@@ -52,8 +52,6 @@ 
#define CREATE_TRACE_POINTS

#include <trace/events/oom.h>



#define ULMK_MAGIC "lmkd"



int sysctl_panic_on_oom =

IS_ENABLED(CONFIG_DEBUG_PANIC_ON_OOM) ? 2 : 0;

int sysctl_oom_kill_allocating_task;