From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by smtp.lore.kernel.org (Postfix) with ESMTP id A8AC1C433EF for ; Thu, 21 Apr 2022 20:43:12 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id EC47D6B0072; Thu, 21 Apr 2022 16:43:11 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id E4A1F6B0073; Thu, 21 Apr 2022 16:43:11 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id CC4C66B0074; Thu, 21 Apr 2022 16:43:11 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from relay.hostedemail.com (relay.hostedemail.com [64.99.140.27]) by kanga.kvack.org (Postfix) with ESMTP id BA2216B0072 for ; Thu, 21 Apr 2022 16:43:11 -0400 (EDT) Received: from smtpin15.hostedemail.com (a10.router.float.18 [10.200.18.1]) by unirelay10.hostedemail.com (Postfix) with ESMTP id 7DFE236C2 for ; Thu, 21 Apr 2022 20:43:11 +0000 (UTC) X-FDA: 79382060982.15.4F47B63 Received: from galois.linutronix.de (Galois.linutronix.de [193.142.43.55]) by imf02.hostedemail.com (Postfix) with ESMTP id A7F058002A for ; Thu, 21 Apr 2022 20:43:09 +0000 (UTC) From: Thomas Gleixner DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020; t=1650573788; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: in-reply-to:in-reply-to:references:references; bh=3UrvlJKlRiA3m0EXXHhSv7iD9kIffu4f0EGmLxSXPIk=; b=ztR2NfvZSvxu/uagLed4yJhw6bpakHq6GeSfdN4jwD/F2tFpS55DzkGnegRCl8hWSShKMq /+5bvzRBuQVdDp2G/3XnZCLH5dZLzs6u/4Mi1UkcWhxC/qWyJ2yJk7KoFIsgSeiWfnszHL 5VMnzIvK+dDYit12PAjzrTsLZZdQTEDUgbIvlDLpVBoUTwYZ0Cn01p8PBM2JgOVotCC5Xf Ldg4v0V1RW2YrHU2gFhj3AJrkN3C8J3lzBkN10m33tGumKbk9XX3AYLmpvUJADviYH67ve aFEQP5OZvWjgMeCdbKVwtHdfE63a1xXlxbwhZJOgqsiPFU4DJuRyRCm+XOu49Q== DKIM-Signature: v=1; a=ed25519-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020e; t=1650573788; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: in-reply-to:in-reply-to:references:references; bh=3UrvlJKlRiA3m0EXXHhSv7iD9kIffu4f0EGmLxSXPIk=; b=/85QIqA89yp1qYgcrfqmxPZVhd77+bk+Hs6XBh5HWyg9iW645ZxNS9WK/IXxqsSwHwBiQA NN0/MJYQs3ZHoqAA== To: Nico Pache , linux-mm@kvack.org, linux-kernel@vger.kernel.org, Andrew Morton Cc: Rafael Aquini , Waiman Long , "Herton R . Krzesinski" , Juri Lelli , Vincent Guittot , Dietmar Eggemann , Steven Rostedt , Ben Segall , Mel Gorman , Daniel Bristot de Oliveira , David Rientjes , Michal Hocko , Andrea Arcangeli , Davidlohr Bueso , Peter Zijlstra , Ingo Molnar , Joel Savitz , Darren Hart , stable@kernel.org Subject: Re: [PATCH v9] oom_kill.c: futex: Delay the OOM reaper to allow time for proper futex cleanup In-Reply-To: <5653e751-f81d-f64e-b4b5-b251949d13d9@redhat.com> References: <20220414144042.677008-1-npache@redhat.com> <874k2mts8p.ffs@tglx> <5653e751-f81d-f64e-b4b5-b251949d13d9@redhat.com> Date: Thu, 21 Apr 2022 22:43:07 +0200 Message-ID: <87tuamrwv8.ffs@tglx> MIME-Version: 1.0 Content-Type: text/plain X-Rspam-User: X-Rspamd-Server: rspam06 X-Rspamd-Queue-Id: A7F058002A X-Stat-Signature: siy4z4ojndqifgfwfeutoy41osehsz1s Authentication-Results: imf02.hostedemail.com; dkim=pass header.d=linutronix.de header.s=2020 header.b=ztR2NfvZ; dkim=pass header.d=linutronix.de header.s=2020e header.b="/85QIqA8"; dmarc=pass (policy=none) header.from=linutronix.de; spf=pass (imf02.hostedemail.com: domain of tglx@linutronix.de designates 193.142.43.55 as permitted sender) smtp.mailfrom=tglx@linutronix.de X-HE-Tag: 1650573789-654786 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: On Thu, Apr 21 2022 at 12:25, Nico Pache wrote: > On 4/21/22 10:40, Thomas Gleixner wrote: >>> Reproducer: https://gitlab.com/jsavitz/oom_futex_reproducer >>> >>> [1] https://elixir.bootlin.com/glibc/latest/source/nptl/allocatestack.c#L370 >> >> A link to the original discussion about this would be more useful than a >> code reference which is stale tomorrow. The above explanation is good >> enough to describe the problem. > > Hi Andrew, > > can you please update the link when you add the ACKs. > > Here is a more stable link: > [1] https://elixir.bootlin.com/glibc/glibc-2.35/source/nptl/allocatestack.c#L370 That link is still uninteresting and has nothing to do with what I was asking for, i.e. replacing it with a link to the original discussion which led to this patch. Thanks, tglx