Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

Commit 3b957b5e authored by Vinayak Menon's avatar Vinayak Menon Committed by Gerrit - the friendly Code Review server
Browse files

mm: process_reclaim: allow nomap-only reclaim 



Allow userspace to disable anon reclaim and enable nomap
reclaim. Also, let userspace set the per task nomap reclaim
size.

Change-Id: I4b52376b02b3590206aaec68e3135ecb54ca0830
Signed-off-by: default avatarVinayak Menon <vinmenon@codeaurora.org>
parent 055a2042

mm/process_reclaim.c

+19 −3
Original line number Diff line number Diff line
@@ -29,6 +29,10 @@ module_param_named(enable_process_reclaim, enable_process_reclaim, int, 0644); 
int per_swap_size = SWAP_CLUSTER_MAX * 32;

module_param_named(per_swap_size, per_swap_size, int, 0644);



/* The per task max number of nomap pages to be reclaimed */

int tsk_nomap_swap_sz;

module_param_named(tsk_nomap_swap_sz, tsk_nomap_swap_sz, int, 0644);



int reclaim_avg_efficiency;

module_param_named(reclaim_avg_efficiency, reclaim_avg_efficiency, int, 0444);
@@ -108,7 +112,7 @@ static void swap_fn(struct work_struct *work) 
	struct selected_task selected[MAX_SWAP_TASKS] = {{0, 0, 0},};

	int si = 0;

	int i;

	int tasksize;

	int tasksize = 0;

	int total_sz = 0;

	short min_score_adj = 360;

	int total_scan = 0;
@@ -116,6 +120,9 @@ static void swap_fn(struct work_struct *work) 
	int nr_to_reclaim;

	int efficiency;



	if (!tsk_nomap_swap_sz && !per_swap_size)

		return;



	rcu_read_lock();

	for_each_process(tsk) {

		struct task_struct *p;
@@ -137,7 +144,11 @@ static void swap_fn(struct work_struct *work) 
			continue;

		}



		if (per_swap_size)

			tasksize = get_mm_counter(p->mm, MM_ANONPAGES);

		else if (tsk_nomap_swap_sz)

			tasksize = get_mm_rss(p->mm);



		task_unlock(p);



		if (tasksize <= 0)
@@ -175,6 +186,9 @@ static void swap_fn(struct work_struct *work) 
	rcu_read_unlock();



	while (si--) {

		if (!per_swap_size)

			goto nomap;



		nr_to_reclaim =

			(selected[si].tasksize * per_swap_size) / total_sz;

		/* scan atleast a page */
@@ -190,7 +204,9 @@ static void swap_fn(struct work_struct *work) 
		total_scan += rp.nr_scanned;

		total_reclaimed += rp.nr_reclaimed;

		reclaimed_anon += rp.nr_reclaimed;



nomap:

		if (tsk_nomap_swap_sz)

			nr_to_reclaim = tsk_nomap_swap_sz;

		rp = reclaim_task_nomap(selected[si].p, nr_to_reclaim);

		total_scan += rp.nr_scanned;

		total_reclaimed += rp.nr_reclaimed;