On Thu, Jun 24, 2021 at 7:01 AM Michal Koutn√Ω [off-list ref] wrote:

Hello Shakeel.

On Tue, Jun 15, 2021 at 10:44:35AM -0700, Shakeel Butt [off-list ref] wrote:

quoted

At the moment memcg stats are read in four contexts:

1. memcg stat user interfaces
2. dirty throttling
3. page fault
4. memory reclaim

Sorry for being dense or ignorant -- what do you refer to with the point
no. 3 (memcg stats reader during page fault)?

Yes, specifically workingset_refault() which reads lruvec stats
directly through lruvec_page_state and indirectly through
lru_note_cost_page.