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mm/damon/sysfs-schemes: support address range type DAMOS filter

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Extend DAMON sysfs interface to support address range based DAMOS filters,
by adding a special keyword for the filter/<N>/type file, namely 'addr',
and two files under filter/<N>/ for specifying the start and the end
addresses of the range, namely 'addr_start' and 'addr_end'.

Link: https://lkml.kernel.org/r/20230802214312.110532-3-sj@kernel.org
Signed-off-by: SeongJae Park <sj@kernel.org>
Cc: Brendan Higgins <brendanhiggins@google.com>
Cc: Jonathan Corbet <corbet@lwn.net>
Cc: Shuah Khan <shuah@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
This commit is contained in:
SeongJae Park 2023-08-02 21:43:01 +00:00 • committed by Andrew Morton
parent ab9bda001b
commit 2f1abcfccd
1 changed files with 56 additions and 0 deletions
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56
mm/damon/sysfs-schemes.c
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@ -282,6 +282,7 @@ struct damon_sysfs_scheme_filter {
enum damos_filter_type type; enum damos_filter_type type;
bool matching; bool matching;
char *memcg_path; char *memcg_path;
struct damon_addr_range addr_range;
}; };
static struct damon_sysfs_scheme_filter *damon_sysfs_scheme_filter_alloc(void) static struct damon_sysfs_scheme_filter *damon_sysfs_scheme_filter_alloc(void)
@ -293,6 +294,7 @@ static struct damon_sysfs_scheme_filter *damon_sysfs_scheme_filter_alloc(void)
static const char * const damon_sysfs_scheme_filter_type_strs[] = { static const char * const damon_sysfs_scheme_filter_type_strs[] = {
"anon", "anon",
"memcg", "memcg",
"addr",
}; };
static ssize_t type_show(struct kobject *kobj, static ssize_t type_show(struct kobject *kobj,
@ -373,6 +375,44 @@ static ssize_t memcg_path_store(struct kobject *kobj,
return count; return count;
} }
static ssize_t addr_start_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->addr_range.start);
}
static ssize_t addr_start_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->addr_range.start);
return err ? err : count;
}
static ssize_t addr_end_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->addr_range.end);
}
static ssize_t addr_end_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->addr_range.end);
return err ? err : count;
}
static void damon_sysfs_scheme_filter_release(struct kobject *kobj) static void damon_sysfs_scheme_filter_release(struct kobject *kobj)
{ {
struct damon_sysfs_scheme_filter *filter = container_of(kobj, struct damon_sysfs_scheme_filter *filter = container_of(kobj,
@ -391,10 +431,18 @@ static struct kobj_attribute damon_sysfs_scheme_filter_matching_attr =
static struct kobj_attribute damon_sysfs_scheme_filter_memcg_path_attr = static struct kobj_attribute damon_sysfs_scheme_filter_memcg_path_attr =
__ATTR_RW_MODE(memcg_path, 0600); __ATTR_RW_MODE(memcg_path, 0600);
static struct kobj_attribute damon_sysfs_scheme_filter_addr_start_attr =
__ATTR_RW_MODE(addr_start, 0600);
static struct kobj_attribute damon_sysfs_scheme_filter_addr_end_attr =
__ATTR_RW_MODE(addr_end, 0600);
static struct attribute *damon_sysfs_scheme_filter_attrs[] = { static struct attribute *damon_sysfs_scheme_filter_attrs[] = {
&damon_sysfs_scheme_filter_type_attr.attr, &damon_sysfs_scheme_filter_type_attr.attr,
&damon_sysfs_scheme_filter_matching_attr.attr, &damon_sysfs_scheme_filter_matching_attr.attr,
&damon_sysfs_scheme_filter_memcg_path_attr.attr, &damon_sysfs_scheme_filter_memcg_path_attr.attr,
&damon_sysfs_scheme_filter_addr_start_attr.attr,
&damon_sysfs_scheme_filter_addr_end_attr.attr,
NULL, NULL,
}; };
ATTRIBUTE_GROUPS(damon_sysfs_scheme_filter); ATTRIBUTE_GROUPS(damon_sysfs_scheme_filter);
@ -1484,7 +1532,15 @@ static int damon_sysfs_set_scheme_filters(struct damos *scheme,
damos_destroy_filter(filter); damos_destroy_filter(filter);
return err; return err;
} }
} else if (filter->type == DAMOS_FILTER_TYPE_ADDR) {
if (sysfs_filter->addr_range.end <
sysfs_filter->addr_range.start) {
damos_destroy_filter(filter);
return -EINVAL;
}
filter->addr_range = sysfs_filter->addr_range;
} }
damos_add_filter(scheme, filter); damos_add_filter(scheme, filter);
} }
return 0; return 0;