linux-kernel - Re: [PATCH 1/2] cgroup: Fix /proc/cgroups count for v2

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Message-ID: <ZlZa-j3Q8UqL84Zh@slm.duckdns.org>
Date: Tue, 28 May 2024 12:30:18 -1000
From: Tejun Heo <tj@...nel.org>
To: Michal Koutný <mkoutny@...e.com>
Cc: "T.J. Mercier" <tjmercier@...gle.com>,
	Zefan Li <lizefan.x@...edance.com>,
	Johannes Weiner <hannes@...xchg.org>, shakeel.butt@...ux.dev,
	cgroups@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 1/2] cgroup: Fix /proc/cgroups count for v2

Hello,

On Tue, May 28, 2024 at 11:42:13PM +0200, Michal Koutný wrote:
> On Tue, May 28, 2024 at 09:43:08AM GMT, Tejun Heo <tj@...nel.org> wrote:
> > I agree that this can be a useful metric but am not sure /proc/cgroups is
> > the right place to put it. Its use of v1 controller names, listing of
> > controllers that don't exist in v2 and the unnecessary column are rather
> > ugly and unnecessary.
> 
> At the same time, the info provided currently is incorrect or at least
> misleading (when only v2 hierarchy is mounted, it mixes the counts) --
> that's what T.J.'s patch attempts to rectify in my understanding.

Yeah, I was hoping to phase out that file once folks are all on v2.

Thanks.

-- 
tejun