netdev - Re: [PATCH v3] memcg: expose socket memory pressure in a cgroup

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Message-ID: <aILTi2-iZ1ge3D8n@slm.duckdns.org>
Date: Thu, 24 Jul 2025 14:44:59 -1000
From: Tejun Heo <tj@...nel.org>
To: Daniel Sedlak <daniel.sedlak@...77.com>
Cc: Shakeel Butt <shakeel.butt@...ux.dev>,
	Michal Koutný <mkoutny@...e.com>,
	Kuniyuki Iwashima <kuniyu@...gle.com>,
	"David S. Miller" <davem@...emloft.net>,
	Eric Dumazet <edumazet@...gle.com>,
	Jakub Kicinski <kuba@...nel.org>, Paolo Abeni <pabeni@...hat.com>,
	Simon Horman <horms@...nel.org>, Jonathan Corbet <corbet@....net>,
	Neal Cardwell <ncardwell@...gle.com>,
	David Ahern <dsahern@...nel.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Yosry Ahmed <yosry.ahmed@...ux.dev>, linux-mm@...ck.org,
	netdev@...r.kernel.org, Johannes Weiner <hannes@...xchg.org>,
	Michal Hocko <mhocko@...nel.org>,
	Roman Gushchin <roman.gushchin@...ux.dev>,
	Muchun Song <muchun.song@...ux.dev>, cgroups@...r.kernel.org,
	Matyas Hurtik <matyas.hurtik@...77.com>
Subject: Re: [PATCH v3] memcg: expose socket memory pressure in a cgroup

On Thu, Jul 24, 2025 at 10:43:27AM +0200, Daniel Sedlak wrote:
...
> Currently, we know the following information:
> 
> - we know when the pressure starts
> - and we know when the pressure ends if not rearmed (start time + HZ)
> 
> From that, we should be able to calculate a similar triplet to the pressure
> endpoints in the cgroups (cpu|io|memory|irq).pressure. That is, how much %
> of time on average was spent under pressure for avg10, avg60, avg300 i.e.
> average pressure over the past 10 seconds, 60 seconds, and 300 seconds,
> respectively. (+ total time spent under pressure)

Let's just add the cumulative duration that socket pressure was present.

Thanks.

-- 
tejun