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Message-ID: <20240827230753.2073580-1-kinseyho@google.com>
Date: Tue, 27 Aug 2024 23:07:37 +0000
From: Kinsey Ho <kinseyho@...gle.com>
To: Andrew Morton <akpm@...ux-foundation.org>
Cc: linux-mm@...ck.org, linux-kernel@...r.kernel.org, cgroups@...r.kernel.org,
Yosry Ahmed <yosryahmed@...gle.com>, Roman Gushchin <roman.gushchin@...ux.dev>,
Johannes Weiner <hannes@...xchg.org>, Michal Hocko <mhocko@...nel.org>,
Shakeel Butt <shakeel.butt@...ux.dev>, Muchun Song <muchun.song@...ux.dev>,
Tejun Heo <tj@...nel.org>, Zefan Li <lizefan.x@...edance.com>, mkoutny@...e.com,
Kinsey Ho <kinseyho@...gle.com>
Subject: [PATCH mm-unstable v3 0/5] Improve mem_cgroup_iter()
Incremental cgroup iteration is being used again [1]. This patchset
improves the reliability of mem_cgroup_iter(). It also improves
simplicity and code readability.
[1] https://lore.kernel.org/20240514202641.2821494-1-hannes@cmpxchg.org/
---
v3: Removed __rcu tag from patch 2/5 which removes the need for
rcu_dereference(). This helps readability.
v2: https://lore.kernel.org/20240813204716.842811-1-kinseyho@google.com/
Add patch to clarify css sibling linkage is RCU protected. The
kernel build bot RCU sparse error from v1 has been ignored.
v1: https://lore.kernel.org/20240724190214.1108049-1-kinseyho@google.com/
Kinsey Ho (5):
cgroup: clarify css sibling linkage is protected by cgroup_mutex or
RCU
mm: don't hold css->refcnt during traversal
mm: increment gen # before restarting traversal
mm: restart if multiple traversals raced
mm: clean up mem_cgroup_iter()
include/linux/cgroup-defs.h | 6 ++-
include/linux/memcontrol.h | 4 +-
kernel/cgroup/cgroup.c | 16 +++----
mm/memcontrol.c | 84 +++++++++++++++----------------------
4 files changed, 50 insertions(+), 60 deletions(-)
--
2.46.0.295.g3b9ea8a38a-goog
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