Re: [PATCH] mm: memcg: stop reclaim when a limit update is superseded

[Michal Hocko]

On Wed 29-07-26 14:15:25, Guopeng Zhang wrote:
> 
> 
> 在 2026/7/27 21:58, Michal Hocko 写道:
> > On Mon 27-07-26 20:59:23, Guopeng Zhang wrote:
> >>
> >>
> >> 在 2026/7/27 16:16, Michal Hocko 写道:
> >>> On Fri 24-07-26 10:18:05, Guopeng Zhang wrote:
[...]
> > Is this trying to replicate any real workload? One would expect that
> > writers to limit do some sort of coordination otherwise the exact
> > behavior is not really well defined.
> > 
> 
> No, this was not motivated by a reported production workload. We found
> it through automated randomized testing for our cgroup observability
> work and reduced it to the reproducer above.

This is an important detail to be mentioned in the changelog. Describing
motivation for a change is really important, especially if it has direct
impact in user interface behavior.
-- 
Michal Hocko
SUSE Labs