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

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Message-ID: <ZlZdmlN3jpKbtgfN@slm.duckdns.org>
Date: Tue, 28 May 2024 12:41:30 -1000
From: Tejun Heo <tj@...nel.org>
To: "T.J. Mercier" <tjmercier@...gle.com>
Cc: Michal Koutný <mkoutny@...e.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 03:38:07PM -0700, T.J. Mercier wrote:
> On Tue, May 28, 2024 at 3:30 PM Tejun Heo <tj@...nel.org> wrote:
> > > 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.
> 
> I'll buy a round of drinks when that happens, but aren't we a few
> years out from that? :)

I don't think we're too far off from at least making cgroup1 a CONFIG
option. As for the /proc/cgroups file, it's mostly useless on cgroup2, so I
was hoping that this could be put behind the same CONFIG option. I haven't
really thought through it tho, so it's not a hard set plan or anything.

Thanks.

-- 
tejun