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git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
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linux
mm/damon/test/core-kunit: add damon_apply_min_nr_regions() test
Add a kunit test for the functionality of damon_apply_min_nr_regions().
Link: https://lkml.kernel.org/r/20260228222831.7232-4-sj@kernel.org
Signed-off-by: SeongJae Park <sj@kernel.org>
Cc: Brendan Higgins <brendan.higgins@linux.dev>
Cc: David Gow <davidgow@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
authored by
SeongJae Park
and committed by
Andrew Morton
ca6969e0
442d87c7
+52
+52
mm/damon/tests/core-kunit.h
+52
mm/damon/tests/core-kunit.h
···
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damos_free_filter(target_filter);
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}
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static void damon_test_apply_min_nr_regions_for(struct kunit *test,
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unsigned long sz_regions, unsigned long min_region_sz,
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unsigned long min_nr_regions,
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unsigned long max_region_sz_expect,
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unsigned long nr_regions_expect)
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{
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struct damon_ctx *ctx;
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struct damon_target *t;
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struct damon_region *r;
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unsigned long max_region_size;
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ctx = damon_new_ctx();
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if (!ctx)
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kunit_skip(test, "ctx alloc fail\n");
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t = damon_new_target();
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if (!t) {
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damon_destroy_ctx(ctx);
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kunit_skip(test, "target alloc fail\n");
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}
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damon_add_target(ctx, t);
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r = damon_new_region(0, sz_regions);
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if (!r) {
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damon_destroy_ctx(ctx);
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kunit_skip(test, "region alloc fail\n");
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}
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damon_add_region(r, t);
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ctx->min_region_sz = min_region_sz;
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ctx->attrs.min_nr_regions = min_nr_regions;
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max_region_size = damon_apply_min_nr_regions(ctx);
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KUNIT_EXPECT_EQ(test, max_region_size, max_region_sz_expect);
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KUNIT_EXPECT_EQ(test, damon_nr_regions(t), nr_regions_expect);
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damon_destroy_ctx(ctx);
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}
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static void damon_test_apply_min_nr_regions(struct kunit *test)
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{
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/* common, expected setup */
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damon_test_apply_min_nr_regions_for(test, 10, 1, 10, 1, 10);
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/* no zero size limit */
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damon_test_apply_min_nr_regions_for(test, 10, 1, 15, 1, 10);
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/* max size should be aligned by min_region_sz */
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damon_test_apply_min_nr_regions_for(test, 10, 2, 2, 6, 2);
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/*
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* when min_nr_regions and min_region_sz conflicts, min_region_sz wins.
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*/
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damon_test_apply_min_nr_regions_for(test, 10, 2, 10, 2, 5);
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}
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static struct kunit_case damon_test_cases[] = {
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KUNIT_CASE(damon_test_target),
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KUNIT_CASE(damon_test_regions),
···
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KUNIT_CASE(damos_test_filter_out),
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KUNIT_CASE(damon_test_feed_loop_next_input),
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KUNIT_CASE(damon_test_set_filters_default_reject),
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KUNIT_CASE(damon_test_apply_min_nr_regions),
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{},
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};
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