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 X-Spam-Level: X-Spam-Status: No, score=-3.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 5DC16C432BE for ; Tue, 31 Aug 2021 16:58:20 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id C712061056 for ; Tue, 31 Aug 2021 16:58:19 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.4.1 mail.kernel.org C712061056 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=kerneltoast.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=kvack.org Received: by kanga.kvack.org (Postfix) id 5112B6B0072; Tue, 31 Aug 2021 12:58:19 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id 49A758D0001; Tue, 31 Aug 2021 12:58:19 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 3614A6B0074; Tue, 31 Aug 2021 12:58:19 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0050.hostedemail.com [216.40.44.50]) by kanga.kvack.org (Postfix) with ESMTP id 229506B0072 for ; Tue, 31 Aug 2021 12:58:19 -0400 (EDT) Received: from smtpin24.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay01.hostedemail.com (Postfix) with ESMTP id CE12B1801B5F9 for ; Tue, 31 Aug 2021 16:58:18 +0000 (UTC) X-FDA: 78535983876.24.85BA40D Received: from mail-pg1-f181.google.com (mail-pg1-f181.google.com [209.85.215.181]) by imf17.hostedemail.com (Postfix) with ESMTP id 79A73F000136 for ; Tue, 31 Aug 2021 16:58:18 +0000 (UTC) Received: by mail-pg1-f181.google.com with SMTP id w8so17382901pgf.5 for ; Tue, 31 Aug 2021 09:58:18 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:date:from:to:cc:subject:message-id:references :mime-version:content-disposition:in-reply-to; bh=RADL0VZuutsxcjrH1H1OF6veIv0hkmcVRwm1RbHKyCk=; b=QuBNdKtw+s21H54VUqtV/r9UXjUlAfGhJycnr9c1bAp5g2qJ9QynjXLWFWd7XGzDiM o5/LvRXwbKqkV5umB/L9ZXEYCdpg/dnCRG5PvBGtQ6uElYj4PQ385f1RmEo88h+pjYOC +RYmdhLBE9DCwm3MRWdh6RelCkx8z5nKS44t+To8toEht7kXo2HG6Xq2+l7W9JvtQHtr zNZx0GYqjG4LzhSJLlyMhf0ePdS7C4itQTX3T0fQyiQyP11V/8ghvI2HyRD3NprxPIkP 8ggH75I49LHSeKaXswYXtk3gqr3zssxD6m8Pr/B32pmMQiVba5MkOjy47cG36oeCCc2o JTGA== X-Gm-Message-State: AOAM5303az0JwIS3Gl2YKG7lWbwBmNLF+8JX2EqYcfalkvdNvrdR2tyy lV1IMK/HIWGssDwPWBuiPcA= X-Google-Smtp-Source: ABdhPJw07czNLMoYptSEg6sH6hXZ+gG/xSCCE36wwLWMV2FLlnCYne2ys1ncRp4xynOz516uKhzUzg== X-Received: by 2002:a65:5b86:: with SMTP id i6mr19353438pgr.62.1630429097467; Tue, 31 Aug 2021 09:58:17 -0700 (PDT) Received: from sultan-box.localdomain (static-198-54-131-119.cust.tzulo.com. [198.54.131.119]) by smtp.gmail.com with ESMTPSA id 20sm18487987pfi.170.2021.08.31.09.58.17 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 31 Aug 2021 09:58:17 -0700 (PDT) Date: Tue, 31 Aug 2021 09:58:15 -0700 From: Sultan Alsawaf To: Vlastimil Babka Cc: linux-mm@kvack.org, mhocko@suse.com, mgorman@techsingularity.net, akpm@linux-foundation.org, linux-kernel@vger.kernel.org Subject: Re: Stuck looping on list_empty(list) in free_pcppages_bulk() Message-ID: References: <11357114-eb6e-39a6-b16d-5e380f770943@suse.cz> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <11357114-eb6e-39a6-b16d-5e380f770943@suse.cz> Authentication-Results: imf17.hostedemail.com; dkim=none; dmarc=none; spf=pass (imf17.hostedemail.com: domain of sultankerneltoast@gmail.com designates 209.85.215.181 as permitted sender) smtp.mailfrom=sultankerneltoast@gmail.com X-Stat-Signature: pn9udd3k3936fn974wyzefcoq46m5uio X-Rspamd-Queue-Id: 79A73F000136 X-Rspamd-Server: rspam04 X-HE-Tag: 1630429098-393891 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 Tue, Aug 31, 2021 at 06:51:23PM +0200, Vlastimil Babka wrote: > Does the kernel have commit 88e8ac11d2ea3 backported? If not, and there were > memory hotplug operations happening, the infinite loop could happen. If that > commit was not backported, and instead 5c3ad2eb7104 was backported, possibly > there are more scenarios outside hotplug that can cause trouble. Yes, it appears that 5.8.18 contains the 88e8ac11d2ea3 backport (commit ID 5b21a116b1365 in linux-5.8.y). Thanks, Sultan