mirror of
https://github.com/torvalds/linux
synced 2024-09-06 18:01:05 +00:00
mm,page_owner: filter out stacks by a threshold
We want to be able to filter out the stacks based on a threshold we can can tune. By writing to 'count_threshold' file, we can adjust the threshold value. Link: https://lkml.kernel.org/r/20240215215907.20121-7-osalvador@suse.de Signed-off-by: Oscar Salvador <osalvador@suse.de> Reviewed-by: Vlastimil Babka <vbabka@suse.cz> Acked-by: Andrey Konovalov <andreyknvl@gmail.com> Cc: Alexander Potapenko <glider@google.com> Cc: Marco Elver <elver@google.com> Cc: Michal Hocko <mhocko@suse.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
This commit is contained in:
parent
765973a098
commit
05bb6f4e82
|
@ -846,6 +846,8 @@ static void *stack_next(struct seq_file *m, void *v, loff_t *ppos)
|
|||
return stack;
|
||||
}
|
||||
|
||||
static unsigned long page_owner_stack_threshold;
|
||||
|
||||
static int stack_print(struct seq_file *m, void *v)
|
||||
{
|
||||
int i, stack_count;
|
||||
|
@ -858,7 +860,8 @@ static int stack_print(struct seq_file *m, void *v)
|
|||
entries = stack_record->entries;
|
||||
stack_count = refcount_read(&stack_record->count) - 1;
|
||||
|
||||
if (!nr_entries || nr_entries < 0 || stack_count < 1)
|
||||
if (!nr_entries || nr_entries < 0 || stack_count < 1 ||
|
||||
stack_count < page_owner_stack_threshold)
|
||||
return 0;
|
||||
|
||||
for (i = 0; i < nr_entries; i++)
|
||||
|
@ -891,6 +894,22 @@ static const struct file_operations page_owner_stack_operations = {
|
|||
.release = seq_release,
|
||||
};
|
||||
|
||||
static int page_owner_threshold_get(void *data, u64 *val)
|
||||
{
|
||||
*val = READ_ONCE(page_owner_stack_threshold);
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int page_owner_threshold_set(void *data, u64 val)
|
||||
{
|
||||
WRITE_ONCE(page_owner_stack_threshold, val);
|
||||
return 0;
|
||||
}
|
||||
|
||||
DEFINE_SIMPLE_ATTRIBUTE(proc_page_owner_threshold, &page_owner_threshold_get,
|
||||
&page_owner_threshold_set, "%llu");
|
||||
|
||||
|
||||
static int __init pageowner_init(void)
|
||||
{
|
||||
struct dentry *dir;
|
||||
|
@ -905,6 +924,8 @@ static int __init pageowner_init(void)
|
|||
dir = debugfs_create_dir("page_owner_stacks", NULL);
|
||||
debugfs_create_file("show_stacks", 0400, dir, NULL,
|
||||
&page_owner_stack_operations);
|
||||
debugfs_create_file("count_threshold", 0600, dir, NULL,
|
||||
&proc_page_owner_threshold);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
|
Loading…
Reference in a new issue