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samples/damon/prcl: implement schemes setup

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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: SeongJae Park <sj@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
This commit is contained in:
SeongJae Park 2024-12-10 13:50:30 -08:00 • committed by Andrew Morton
parent 2aca254620
commit 15e01f3912
1 changed files with 20 additions and 0 deletions
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20
samples/damon/prcl.c
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@ -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);
}