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Subject: Re: [PATCH] memcg: net: track network throttling due to memcg memory
 pressure
To: Shakeel Butt <shakeel.butt@linux.dev>
Cc: Andrew Morton <akpm@linux-foundation.org>,
 Johannes Weiner <hannes@cmpxchg.org>, Michal Hocko <mhocko@kernel.org>,
 Roman Gushchin <roman.gushchin@linux.dev>,
 Muchun Song <muchun.song@linux.dev>, Tejun Heo <tj@kernel.org>,
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 Paolo Abeni <pabeni@redhat.com>, Willem de Bruijn <willemb@google.com>,
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 Matyas Hurtik <matyas.hurtik@cdn77.com>, Simon Horman <horms@kernel.org>,
 Neal Cardwell <ncardwell@google.com>, Wei Wang <weibunny@meta.com>,
 netdev@vger.kernel.org, linux-mm@kvack.org, cgroups@vger.kernel.org,
 linux-kernel@vger.kernel.org, Meta kernel team <kernel-team@meta.com>
References: <20251016013116.3093530-1-shakeel.butt@linux.dev>
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From: Daniel Sedlak <daniel.sedlak@cdn77.com>
In-Reply-To: <pwy7qfx3afnadkjtemftqyrufhhexpw26srxfeilel5uhbywtt@cjvaean56txc>
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On 10/16/25 6:02 PM, Shakeel Butt wrote:
> On Thu, Oct 16, 2025 at 12:42:19PM +0200, Daniel Sedlak wrote:
>> On 10/16/25 3:31 AM, Shakeel Butt wrote:
>> I am curious how the future work will unfold. If you need help with future
>> developments I can help you, we have hundreds of servers where this
>> throttling is happening.
> 
> I think first thing I would like to know if this patch is a good start
> for your use-case of observability and debugging.What else do you need
> for sufficient support for your use-case?

Yes, it is a good start, we can now hook this easily into our monitoring 
system and detect affected servers more easily.

> I imagine that would be
> tracepoints to extract more information on the source of the throttling.
> If you don't mind, can you take a stab at that?

We have some tracepoints that we have used for debugging this. We would 
like to upstream them, if that makes sense to you?

Thanks!
Daniel