netdev - Re: [PATCH v1] cgroup/rstat: add cgroup_rstat_cpu

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Date: Mon, 6 May 2024 12:45:42 -0700
From: Shakeel Butt <shakeel.butt@...ux.dev>
To: Ivan Babrou <ivan@...udflare.com>
Cc: Jesper Dangaard Brouer <hawk@...nel.org>, 
	Waiman Long <longman@...hat.com>, tj@...nel.org, hannes@...xchg.org, lizefan.x@...edance.com, 
	cgroups@...r.kernel.org, yosryahmed@...gle.com, netdev@...r.kernel.org, 
	linux-mm@...ck.org, kernel-team@...udflare.com, 
	Arnaldo Carvalho de Melo <acme@...nel.org>, Sebastian Andrzej Siewior <bigeasy@...utronix.de>, 
	Daniel Dao <dqminh@...udflare.com>, jr@...udflare.com
Subject: Re: [PATCH v1] cgroup/rstat: add cgroup_rstat_cpu_lock helpers and
 tracepoints

On Mon, May 06, 2024 at 09:28:41AM -0700, Ivan Babrou wrote:
> On Mon, May 6, 2024 at 9:22 AM Shakeel Butt <shakeel.butt@...ux.dev> wrote:
[...]
> >
> > The reason I asked about MEMCG_SOCK was that it might be causing larger
> > update trees (more cgroups) on CPUs processing the NET_RX.
> 
> We pass cgroup.memory=nosocket in the kernel cmdline:
> 
> * https://lore.kernel.org/lkml/CABWYdi0G7cyNFbndM-ELTDAR3x4Ngm0AehEp5aP0tfNkXUE+Uw@mail.gmail.com/
> 

Ah another thing we should fix for you folks. Is it possible to repro
the issue on the latest linus tree and report back? I will be busy for
next 2 weeks but will get back to this after that.