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mm/damon/sysfs-schemes: add files for setting damos_filter->sz_range

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Add min and max files for damon filters to let the userspace decide the
min/max folio size to operate on.  This will be needed to decide what
folio sizes to give pa_stat for.

Link: https://lkml.kernel.org/r/20250211124437.278873-3-usamaarif642@gmail.com
Signed-off-by: Usama Arif <usamaarif642@gmail.com>
Reviewed-by: SeongJae Park <sj@kernel.org>
Cc: David Hildenbrand <david@redhat.com>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
This commit is contained in:
Usama Arif 2025-02-11 12:43:41 +00:00 committed by Andrew Morton
parent 0431c42622
commit ea1f204ba2
1 changed files with 54 additions and 0 deletions
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54
mm/damon/sysfs-schemes.c
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@ -316,6 +316,7 @@ struct damon_sysfs_scheme_filter {
bool allow;
char *memcg_path;
struct damon_addr_range addr_range;
struct damon_size_range sz_range;
int target_idx;
};
@ -474,6 +475,44 @@ static ssize_t addr_end_store(struct kobject *kobj,
return err ? err : count;
}
static ssize_t min_show(struct kobject *kobj,
struct kobj_attribute *attr, char *buf)
{
struct damon_sysfs_scheme_filter *filter = container_of(kobj,
struct damon_sysfs_scheme_filter, kobj);
return sysfs_emit(buf, "%lu\n", filter->sz_range.min);
}
static ssize_t min_store(struct kobject *kobj,
struct kobj_attribute *attr, const char *buf, size_t count)
{
struct damon_sysfs_scheme_filter *filter = container_of(kobj,
struct damon_sysfs_scheme_filter, kobj);
int err = kstrtoul(buf, 0, &filter->sz_range.min);
return err ? err : count;
}
static ssize_t max_show(struct kobject *kobj,
struct kobj_attribute *attr, char *buf)
{
struct damon_sysfs_scheme_filter *filter = container_of(kobj,
struct damon_sysfs_scheme_filter, kobj);
return sysfs_emit(buf, "%lu\n", filter->sz_range.max);
}
static ssize_t max_store(struct kobject *kobj,
struct kobj_attribute *attr, const char *buf, size_t count)
{
struct damon_sysfs_scheme_filter *filter = container_of(kobj,
struct damon_sysfs_scheme_filter, kobj);
int err = kstrtoul(buf, 0, &filter->sz_range.max);
return err ? err : count;
}
static ssize_t damon_target_idx_show(struct kobject *kobj,
struct kobj_attribute *attr, char *buf)
{
@ -520,6 +559,12 @@ static struct kobj_attribute damon_sysfs_scheme_filter_addr_start_attr =
static struct kobj_attribute damon_sysfs_scheme_filter_addr_end_attr =
__ATTR_RW_MODE(addr_end, 0600);
static struct kobj_attribute damon_sysfs_scheme_filter_min_attr =
__ATTR_RW_MODE(min, 0600);
static struct kobj_attribute damon_sysfs_scheme_filter_max_attr =
__ATTR_RW_MODE(max, 0600);
static struct kobj_attribute damon_sysfs_scheme_filter_damon_target_idx_attr =
__ATTR_RW_MODE(damon_target_idx, 0600);
@ -530,6 +575,8 @@ static struct attribute *damon_sysfs_scheme_filter_attrs[] = {
&damon_sysfs_scheme_filter_memcg_path_attr.attr,
&damon_sysfs_scheme_filter_addr_start_attr.attr,
&damon_sysfs_scheme_filter_addr_end_attr.attr,
&damon_sysfs_scheme_filter_min_attr.attr,
&damon_sysfs_scheme_filter_max_attr.attr,
&damon_sysfs_scheme_filter_damon_target_idx_attr.attr,
NULL,
};
@ -1954,6 +2001,13 @@ static int damon_sysfs_add_scheme_filters(struct damos *scheme,
filter->addr_range = sysfs_filter->addr_range;
} else if (filter->type == DAMOS_FILTER_TYPE_TARGET) {
filter->target_idx = sysfs_filter->target_idx;
} else if (filter->type == DAMOS_FILTER_TYPE_HUGEPAGE_SIZE) {
if (sysfs_filter->sz_range.min >
sysfs_filter->sz_range.max) {
damos_destroy_filter(filter);
return -EINVAL;
}
filter->sz_range = sysfs_filter->sz_range;
}
damos_add_filter(scheme, filter);