Re: [PATCH v2 0/2] mm: fix node reclaim swappiness handling

[Ridong Chen]

On 7/16/2026 11:17 AM, Ridong wrote:
> From: Ridong <chenridong@xxxxxxxxxx>
>
> The per-node proactive reclaim interface
> (/sys/devices/system/node/nodeX/reclaim) accepts a swappiness parameter,
> but it is silently ignored when CONFIG_MEMCG is disabled. The root cause
> is that sc_swappiness() has separate implementations for CONFIG_MEMCG and
> !CONFIG_MEMCG, and the latter never checks proactive_swappiness.
>
> Patch 1 moves mem_cgroup_swappiness() and vm_swappiness out of the public
> include/linux/swap.h into the mm-private mm/swap.h, and makes the helper
> handle both CONFIG_MEMCG and !CONFIG_MEMCG in a single inline function.
> This is a prerequisite for unifying sc_swappiness().
>
> Patch 2 consolidates sc_swappiness() into a single definition that works
> regardless of CONFIG_MEMCG, fixing the node reclaim swappiness bug.
>
> ---
>
> v1 -> v2:
>   - Move mem_cgroup_swappiness() and vm_swappiness to mm/swap.h instead of
>     include/linux/memcontrol.h. Suggested by Barry Song.
>   - Correct fix tag for patch 2.
>
> v1: https://lore.kernel.org/all/20260711091157.306070-1-ridong.chen@xxxxxxxxx/
>
> Ridong Chen (2):
>    memcg: move mem_cgroup_swappiness and vm_swappiness to mm/swap.h
>    mm: vmscan: fix node reclaim ignoring swappiness parameter
>
>   include/linux/memcontrol.h |  4 ++--
>   include/linux/swap.h       | 19 -------------------
>   mm/memcontrol.c            |  4 ++--
>   mm/swap.h                  | 20 ++++++++++++++++++++
>   mm/vmscan.c                | 19 +++++++------------
>   5 files changed, 31 insertions(+), 35 deletions(-)

Hello all,

Can this series be applied?

Just a reminder in case this gets buried.

--
Best regards
Ridong