Re: [PATCH v3 1/1] cgroup: fix deadlock caused by cgroup_mutex and cpu_hotplug_lock

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To: Chen Ridong <chenridong@xxxxxxxxxxxxxxx>
Subject: Re: [PATCH v3 1/1] cgroup: fix deadlock caused by cgroup_mutex and cpu_hotplug_lock
From: Tejun Heo <tj@xxxxxxxxxx>
Date: Wed, 11 Sep 2024 19:59:48 -1000
Cc: Roman Gushchin <roman.gushchin@xxxxxxxxx>, Michal Koutný <mkoutny@xxxxxxxx>, Chen Ridong <chenridong@xxxxxxxxxx>, martin.lau@xxxxxxxxx, ast@xxxxxxxxxx, daniel@xxxxxxxxxxxxx, andrii@xxxxxxxxxx, eddyz87@xxxxxxxxx, song@xxxxxxxxxx, yonghong.song@xxxxxxxxx, john.fastabend@xxxxxxxxx, kpsingh@xxxxxxxxxx, sdf@xxxxxxxxxx, haoluo@xxxxxxxxxx, jolsa@xxxxxxxxxx, lizefan.x@xxxxxxxxxxxxx, hannes@xxxxxxxxxxx, bpf@xxxxxxxxxxxxxxx, cgroups@xxxxxxxxxxxxxxx, linux-kernel@xxxxxxxxxxxxxxx
In-reply-to: <83cea8c6-d2f8-42f2-990e-80412ebf296e@huaweicloud.com>
References: <20240817093334.6062-1-chenridong@huawei.com> <20240817093334.6062-2-chenridong@huawei.com> <kz6e3oadkmrl7elk6z765t2hgbcqbd2fxvb2673vbjflbjxqck@suy4p2mm7dvw> <07501c67-3b18-48e3-8929-e773d8d6920f@huaweicloud.com> <ZuC0A98pxYc3TODM@google.com> <ZuC3femqBNufgX1D@slm.duckdns.org> <83cea8c6-d2f8-42f2-990e-80412ebf296e@huaweicloud.com>

On Thu, Sep 12, 2024 at 09:33:23AM +0800, Chen Ridong wrote:
> I will add a patch do document that.
> Should we modify WQ_DFL_ACTIVE(256 now)? Maybe 1024 is acceptable?

Yeah, let's bump it.

Thanks.

-- 
tejun

References:
- [PATCH v3 0/1] Fix deadlock caused by cgroup_mutex and cpu_hotplug_lock
  - From: Chen Ridong
- [PATCH v3 1/1] cgroup: fix deadlock caused by cgroup_mutex and cpu_hotplug_lock
  - From: Chen Ridong
- Re: [PATCH v3 1/1] cgroup: fix deadlock caused by cgroup_mutex and cpu_hotplug_lock
  - From: Michal Koutný
- Re: [PATCH v3 1/1] cgroup: fix deadlock caused by cgroup_mutex and cpu_hotplug_lock
  - From: Chen Ridong
- Re: [PATCH v3 1/1] cgroup: fix deadlock caused by cgroup_mutex and cpu_hotplug_lock
  - From: Roman Gushchin
- Re: [PATCH v3 1/1] cgroup: fix deadlock caused by cgroup_mutex and cpu_hotplug_lock
  - From: Tejun Heo
- Re: [PATCH v3 1/1] cgroup: fix deadlock caused by cgroup_mutex and cpu_hotplug_lock
  - From: Chen Ridong

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