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From: Michal Hocko <mhocko@suse.com>
To: Shakeel Butt <shakeel.butt@linux.dev>
Cc: "Andrew Morton" <akpm@linux-foundation.org>,
	"David Rientjes" <rientjes@google.com>,
	"Johannes Weiner" <hannes@cmpxchg.org>,
	"Roman Gushchin" <roman.gushchin@linux.dev>,
	"Muchun Song" <muchun.song@linux.dev>,
	"Thomas Gleixner" <tglx@kernel.org>,
	"Ingo Molnar" <mingo@redhat.com>,
	"Suren Baghdasaryan" <surenb@google.com>,
	"Usama Arif" <usama.arif@linux.dev>,
	"Peter Zijlstra" <peterz@infradead.org>,
	"Darren Hart" <dvhart@infradead.org>,
	"Davidlohr Bueso" <dave@stgolabs.net>,
	"André Almeida" <andrealmeid@igalia.com>,
	"Liam R . Howlett" <liam@infradead.org>,
	"Yosry Ahmed" <yosry@kernel.org>,
	"Rik van Riel" <riel@surriel.com>,
	"Nhat Pham" <nphamcs@gmail.com>,
	"Meta kernel team" <kernel-team@meta.com>,
	linux-mm@kvack.org, cgroups@vger.kernel.org,
	linux-kernel@vger.kernel.org
Subject: Re: [RFC] Robust futex causing memcg OOM storm on exit
Date: Wed, 29 Jul 2026 10:21:45 +0200	[thread overview]
Message-ID: <amm4GQP90D6Ho6Rw@tiehlicka> (raw)
In-Reply-To: <amlkSmMZTWrT4rau@linux.dev>

On Tue 28-07-26 19:25:57, Shakeel Butt wrote:
[...]
> Now I have much better results. Previous numbers were on a VM and now I have
> ran on a physical machine and the results are much better and consistent. The
> baseline consistently shows ~90 seconds exit time while (tsk_is_oom_victim +
> MMF_OOM_SKIP) consistently show ~3 seconds exit time. I will send the formal
> patch soon.

Thanks a lot for the testing Shakeel! We can always ease the check but
if the more conservative approach helps already then this would be my
preferred way.

Thanks!

-- 
Michal Hocko
SUSE Labs

      reply	other threads:[~2026-07-29  8:21 UTC|newest]

Thread overview: 10+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2026-07-23  0:19 [RFC] Robust futex causing memcg OOM storm on exit Shakeel Butt
2026-07-27 14:36 ` Michal Hocko
2026-07-27 15:38   ` Shakeel Butt
2026-07-27 20:48     ` Shakeel Butt
2026-07-28  7:27       ` Michal Hocko
2026-07-28 16:55         ` Shakeel Butt
2026-07-28 19:23           ` Michal Hocko
2026-07-28 21:57             ` Shakeel Butt
2026-07-29  2:25               ` Shakeel Butt
2026-07-29  8:21                 ` Michal Hocko [this message]

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