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Subject: [PATCH v1 0/3] cgroup/rstat: global cgroup_rstat_lock changes
From: Jesper Dangaard Brouer <hawk@kernel.org>
To: tj@kernel.org, hannes@cmpxchg.org, lizefan.x@bytedance.com,
 cgroups@vger.kernel.org, yosryahmed@google.com, longman@redhat.com
Cc: Jesper Dangaard Brouer <hawk@kernel.org>, netdev@vger.kernel.org,
 linux-mm@kvack.org, linux-kernel@vger.kernel.org, shakeel.butt@linux.dev,
 kernel-team@cloudflare.com, linux-kernel@vger.kernel.org,
 Arnaldo Carvalho de Melo <acme@kernel.org>,
 Sebastian Andrzej Siewior <bigeasy@linutronix.de>, mhocko@kernel.org
Date: Tue, 16 Apr 2024 19:51:19 +0200
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This patchset is focused on the global cgroup_rstat_lock.

 Patch-1: Adds tracepoints to improve measuring lock behavior.
 Patch-2: Converts the global lock into a mutex.
 Patch-3: Limits userspace triggered pressure on the lock.

Background in discussion thread [1].
 [1] https://lore.kernel.org/all/ac4cf07f-52dd-454f-b897-2a4b3796a4d9@kernel.org/

---

Jesper Dangaard Brouer (3):
      cgroup/rstat: add cgroup_rstat_lock helpers and tracepoints
      cgroup/rstat: convert cgroup_rstat_lock back to mutex
      cgroup/rstat: introduce ratelimited rstat flushing


 block/blk-cgroup.c            |   2 +-
 include/linux/cgroup-defs.h   |   1 +
 include/linux/cgroup.h        |   5 +-
 include/trace/events/cgroup.h |  48 +++++++++++++++
 kernel/cgroup/rstat.c         | 111 ++++++++++++++++++++++++++++++----
 mm/memcontrol.c               |   1 +
 6 files changed, 153 insertions(+), 15 deletions(-)

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