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mm/damon/core: s/damon_max_nr_accesses()/damon_nr_samples_per_aggr()/

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damon_max_nr_accesses() actually returns the number of samples DAMON
checks for each region per each aggregation interval.  Rename it to better
describe what it really does and not confusing for more general uses.

Link: https://lore.kernel.org/20260708135359.122587-3-sj@kernel.org
Signed-off-by: SJ Park <sj@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
This commit is contained in:
SJ Park
2026-07-08 06:53:52 -07:00
committed by Andrew Morton
parent f3ab162a92
commit 571cc9a34e
4 changed files with 10 additions and 8 deletions
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10
include/linux/damon.h
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@@ -1056,15 +1056,17 @@ static inline bool damon_target_has_pid(const struct damon_ctx *ctx)
return ctx->ops.id == DAMON_OPS_VADDR || ctx->ops.id == DAMON_OPS_FVADDR;
}
static inline unsigned int damon_max_nr_accesses(const struct damon_attrs *attrs)
/* Returns number of samples per aggregation interval */
static inline unsigned int damon_nr_samples_per_aggr(
const struct damon_attrs *attrs)
{
unsigned long sample_interval;
unsigned long max_nr_accesses;
unsigned long nr_samples;
sample_interval = attrs->sample_interval ? : 1;
max_nr_accesses = min(attrs->aggr_interval / sample_interval,
nr_samples = min(attrs->aggr_interval / sample_interval,
(unsigned long)UINT_MAX);
return max_nr_accesses ? : 1;
return nr_samples ? : 1;
}

4
mm/damon/core.c
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@@ -880,14 +880,14 @@ static unsigned int damon_age_for_new_attrs(unsigned int age,
static unsigned int damon_accesses_bp_to_nr_accesses(
unsigned int accesses_bp, struct damon_attrs *attrs)
{
return accesses_bp * damon_max_nr_accesses(attrs) / 10000;
return accesses_bp * damon_nr_samples_per_aggr(attrs) / 10000;
}
/* Convert nr_accesses to access ratio in bp (per 10,000) */
static unsigned int damon_nr_accesses_to_accesses_bp(
unsigned int nr_accesses, struct damon_attrs *attrs)
{
return mult_frac(nr_accesses, 10000, damon_max_nr_accesses(attrs));
return mult_frac(nr_accesses, 10000, damon_nr_samples_per_aggr(attrs));
}
static unsigned int damon_nr_accesses_for_new_attrs(unsigned int nr_accesses,

2
mm/damon/lru_sort.c
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@@ -303,7 +303,7 @@ static int damon_lru_sort_apply_parameters(void)
goto out;
err = -ENOMEM;
hot_thres = damon_max_nr_accesses(&attrs) *
hot_thres = damon_nr_samples_per_aggr(&attrs) *
hot_thres_access_freq / 1000;
hot_scheme = damon_lru_sort_new_hot_scheme(hot_thres);
if (!hot_scheme)

2
mm/damon/ops-common.c
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@@ -112,7 +112,7 @@ int damon_hot_score(struct damon_ctx *c, struct damon_region *r,
int hotness;
freq_subscore = r->nr_accesses * DAMON_MAX_SUBSCORE /
damon_max_nr_accesses(&c->attrs);
damon_nr_samples_per_aggr(&c->attrs);
age_in_sec = (unsigned long)r->age * c->attrs.aggr_interval / 1000000;
if (age_in_sec)