linux-kernel - Re: [PATCH v4 0/3] Fix deadlock caused by cgroup_mutex and cpu_hotplug

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Message-ID: <eaa664da-8d88-486c-9793-09a97d8c607a@huaweicloud.com>
Date: Wed, 18 Sep 2024 17:44:47 +0800
From: Chen Ridong <chenridong@...weicloud.com>
To: martin.lau@...ux.dev, ast@...nel.org, daniel@...earbox.net,
 andrii@...nel.org, eddyz87@...il.com, song@...nel.org,
 yonghong.song@...ux.dev, john.fastabend@...il.com, kpsingh@...nel.org,
 sdf@...gle.com, haoluo@...gle.com, jolsa@...nel.org, tj@...nel.org,
 lizefan.x@...edance.com, hannes@...xchg.org, roman.gushchin@...ux.dev,
 Michal Koutný <mkoutny@...e.com>
Cc: bpf@...r.kernel.org, cgroups@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v4 0/3] Fix deadlock caused by cgroup_mutex and
 cpu_hotplug_lock



On 2024/9/13 21:17, Chen Ridong wrote:
> The patch 1 have been reviewed by Michal Koutný.
> Add two patches as follow.
> 
> v4:
> - add a patch to document that saturating the system_wq is not permitted.
> - add a patch to adjust WQ_MAX_ACTIVE from 512 to 2048.
> 
> v3:
> - optimize commit msg.
> 
> Link v1: https://lore.kernel.org/cgroups/20240607110313.2230669-1-chenridong@huawei.com/
> Link v2: https://lore.kernel.org/cgroups/20240719025232.2143638-1-chenridong@huawei.com/
> Link v3: https://lore.kernel.org/cgroups/20240817093334.6062-1-chenridong@huawei.com/
> 
> 
> Chen Ridong (3):
>    cgroup: fix deadlock caused by cgroup_mutex and cpu_hotplug_lock
>    workqueue: doc: Add a note saturating the system_wq is not permitted
>    workqueue: Adjust WQ_MAX_ACTIVE from 512 to 2048
> 
>   Documentation/core-api/workqueue.rst | 8 ++++++--
>   include/linux/workqueue.h            | 2 +-
>   kernel/bpf/cgroup.c                  | 2 +-
>   kernel/cgroup/cgroup-internal.h      | 1 +
>   kernel/cgroup/cgroup.c               | 2 +-
>   5 files changed, 10 insertions(+), 5 deletions(-)
> 
Friendly ping.