Commit 15e01f39 authored by SeongJae Park's avatar SeongJae Park Committed by Andrew Morton
Browse files

samples/damon/prcl: implement schemes setup 

Implement a proactive cold memory regions reclaiming logic of prcl sample
module using DAMOS.  The logic treats memory regions that not accessed at
all for five or more seconds as cold, and reclaim those as soon as found.

Link: https://lkml.kernel.org/r/20241210215030.85675-6-sj@kernel.org


Signed-off-by: default avatarSeongJae Park <sj@kernel.org>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
parent 2aca2546

samples/damon/prcl.c

+20 −0
Original line number Diff line number Diff line
@@ -49,6 +49,7 @@ static int damon_sample_prcl_after_aggregate(struct damon_ctx *c) 
static int damon_sample_prcl_start(void)

{

	struct damon_target *target;

	struct damos *scheme;



	pr_info("start\n");
@@ -75,6 +76,25 @@ static int damon_sample_prcl_start(void) 


	ctx->callback.after_aggregation = damon_sample_prcl_after_aggregate;



	scheme = damon_new_scheme(

			&(struct damos_access_pattern) {

			.min_sz_region = PAGE_SIZE,

			.max_sz_region = ULONG_MAX,

			.min_nr_accesses = 0,

			.max_nr_accesses = 0,

			.min_age_region = 50,

			.max_age_region = UINT_MAX},

			DAMOS_PAGEOUT,

			0,

			&(struct damos_quota){},

			&(struct damos_watermarks){},

			NUMA_NO_NODE);

	if (!scheme) {

		damon_destroy_ctx(ctx);

		return -ENOMEM;

	}

	damon_set_schemes(ctx, &scheme, 1);



	return damon_start(&ctx, 1, true);

}