Re: [PATCH] mm/ksm: delete the redundant ksm_merging_pages interafce in proc

[Andrew Morton]

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.