On Mon 04-09-23 17:29:14, Michal Koutny wrote: > Hello. > > On Mon, Sep 04, 2023 at 04:50:15PM +0200, Michal Hocko <mhocko@xxxxxxxx> wrote: > > I have hard time to follow why we really want/need this. Does this cause > > any observable changes to the behavior? > > Behavior change depends on how much userspace triggers the root memcg > flush, from nothing to effectively offloading flushing to userspace tasks. > (Theory^^^) > > It keeps stats_flush_threshold up to date representing global error > estimate so that error-tolerant readers may save their time and it keeps > the reasoning about the stats_flush_threshold effect simple. So it also creates an undocumented but userspace visible behavior. Something that userspace might start depending on, right? -- Michal Hocko SUSE Labs
