linux-kernel - [PATCH v2 0/2] Suppress undesirable hung task warnings.

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Message-Id: <20250924034100.3701520-1-sunjunchao@bytedance.com>
Date: Wed, 24 Sep 2025 11:40:58 +0800
From: Julian Sun <sunjunchao@...edance.com>
To: cgroups@...r.kernel.org,
	linux-kernel@...r.kernel.org
Cc: akpm@...ux-foundation.org,
	lance.yang@...ux.dev,
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Subject: [PATCH v2 0/2] Suppress undesirable hung task warnings.

As suggested by Andrew Morton in [1], we need a general mechanism 
that allows the hung task detector to ignore unnecessary hung 
tasks. This patch set implements this functionality and enables it
in memcg.

Patch 1 introduces touch_hung_task_detector(), which allows a task to 
mark itself and then hung task detector will ignore warnings for it.

Patch 2 uses touch_hung_task_detector() in the final phase of memcg 
teardown to eliminate the hung task warning.

[1]: https://lore.kernel.org/all/20250917152155.5a8ddb3e4ff813289ea0b4c9@linux-foundation.org/

Julian Sun (2):
  hung_task: Introduce touch_hung_task_dector().
  memcg: Don't trigger hung task warnings when memcg is releasing
    resources.

 include/linux/nmi.h |  2 ++
 kernel/hung_task.c  | 13 +++++++++++++
 mm/memcontrol.c     |  5 ++++-
 3 files changed, 19 insertions(+), 1 deletion(-)

-- 
2.39.5