On Tue, 27 Jun 2023 21:35:42 +0800 Nanyong Sun <sunnanyong@xxxxxxxxxx> wrote: > Since the ksm_merging_pages information already included in > /proc/<pid>/ksm_stat, we can delete /proc/<pid>/ksm_merging_pages to > make the directory more clean, and can save a little bit resources. Well, this is a non backward compatible change - any userspace which depends on ksm_merging_pages will break. Yes, we could remove this but it will be a lengthy process involving emitting a "please use ksm_stat instead" message for a few years before removal.