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Commit 13aeef14 authored by Charan Teja Reddy's avatar Charan Teja Reddy Committed by Swathi Sridhar
Browse files

mm: oom_kill: dump info of ulmk killed process after reaping 



Dump the memory information of tasks that receives a SIGKILL from
userspace and oom reaped.

Change-Id: I3183f8893442d2597f2fc1cd6d092d9807226b2f
Signed-off-by: default avatarCharan Teja Reddy <charante@codeaurora.org>
parent 1701d5eb

mm/oom_kill.c

+37 −0
Original line number Diff line number Diff line
@@ -1171,8 +1171,35 @@ void pagefault_out_of_memory(void) 
	mutex_unlock(&oom_lock);

}



/* Call this function with task_lock being held as we're accessing ->mm */

void dump_killed_info(struct task_struct *selected)

{

	int selected_tasksize = get_mm_rss(selected->mm);



	pr_info("Killing '%s' (%d), adj %hd,\n"

		"   to free %ldkB on behalf of '%s' (%d)\n"

		"   Free CMA is %ldkB\n"

		"   Total reserve is %ldkB\n"

		"   Total free pages is %ldkB\n"

		"   Total file cache is %ldkB\n",

		selected->comm, selected->pid,

		selected->signal->oom_score_adj,

		selected_tasksize * (long)(PAGE_SIZE / 1024),

		current->comm, current->pid,

		global_zone_page_state(NR_FREE_CMA_PAGES) *

		(long)(PAGE_SIZE / 1024),

		totalreserve_pages * (long)(PAGE_SIZE / 1024),

		global_zone_page_state(NR_FREE_PAGES) *

		(long)(PAGE_SIZE / 1024),

		global_node_page_state(NR_FILE_PAGES) *

		(long)(PAGE_SIZE / 1024));

}



void add_to_oom_reaper(struct task_struct *p)

{

	static DEFINE_RATELIMIT_STATE(reaper_rs, DEFAULT_RATELIMIT_INTERVAL,

						 DEFAULT_RATELIMIT_BURST);



	if (!sysctl_reap_mem_on_sigkill)

		return;
@@ -1185,6 +1212,16 @@ void add_to_oom_reaper(struct task_struct *p) 
		__mark_oom_victim(p);

		wake_oom_reaper(p);

	}



	dump_killed_info(p);

	task_unlock(p);



	if (__ratelimit(&reaper_rs) && p->signal->oom_score_adj == 0) {

		show_mem(SHOW_MEM_FILTER_NODES, NULL);

		show_mem_call_notifiers();

		if (sysctl_oom_dump_tasks)

			dump_tasks(NULL, NULL);

	}



	put_task_struct(p);

}