On Thu, Sep 21, 2023 at 1:11 AM Yosry Ahmed <yosryahmed@google.com> wrote:
>
> This series attempts to address shortages in today's approach for memcg
> stats flushing, namely occasionally stale or expensive stat reads. The
> series does so by changing the threshold that we use to decide whether
> to trigger a flush to be per memcg instead of global (patch 3), and then
> changing flushing to be per memcg (i.e. subtree flushes) instead of
> global (patch 5).
>
> Patch 3 & 5 are the core of the series, and they include more details
> and testing results. The rest are either cleanups or prep work.
>
> This series replaces the "memcg: more sophisticated stats flushing"
> series [1], which also replaces another series, in a long list of
> attempts to improve memcg stats flushing. It is not a v2 as it is a
> completely different approach. This is based on collected feedback from
> discussions on lkml in all previous attempts. Hopefully, this is the
> final attempt.
>
> [1]https://lore.kernel.org/lkml/20230913073846.1528938-1-yosryahmed@google.com/
>
> Yosry Ahmed (5):
> mm: memcg: change flush_next_time to flush_last_time
> mm: memcg: move vmstats structs definition above flushing code
> mm: memcg: make stats flushing threshold per-memcg
> mm: workingset: move the stats flush into workingset_test_recent()
> mm: memcg: restore subtree stats flushing
>
> include/linux/memcontrol.h | 8 +-
> mm/memcontrol.c | 269 +++++++++++++++++++++----------------
> mm/vmscan.c | 2 +-
> mm/workingset.c | 37 +++--
> 4 files changed, 181 insertions(+), 135 deletions(-)
>
> --
> 2.42.0.459.ge4e396fd5e-goog
>
Friendly ping for feedback on this approach :)