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=-2.7 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, 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 C30B0C433DB for ; Mon, 22 Feb 2021 23:41:11 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 8163A64DA5 for ; Mon, 22 Feb 2021 23:41:11 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231143AbhBVXlK (ORCPT ); Mon, 22 Feb 2021 18:41:10 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:36538 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229996AbhBVXlI (ORCPT ); Mon, 22 Feb 2021 18:41:08 -0500 Received: from mail-qk1-x731.google.com (mail-qk1-x731.google.com [IPv6:2607:f8b0:4864:20::731]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 0C2D4C061574; Mon, 22 Feb 2021 15:40:28 -0800 (PST) Received: by mail-qk1-x731.google.com with SMTP id x124so3433725qkc.1; Mon, 22 Feb 2021 15:40:28 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=mime-version:references:in-reply-to:from:date:message-id:subject:to :cc; bh=Lu36EvNlVpZLf9vn0AKWWzvCVJacgGfuW8XvxcdcSYc=; b=MKjAdzGJEiG1GANzaNG8NQwv8A3zr3O9eiZt64ixz7q3fFUbHW+A/18gmHI0mqQkl4 c0Czceg+s2X7DgJgR1QbTh5bRcInUFBql0hvlSazNZVog5hKHyIwhda+e0uTeGUs/zOR 0K5hMHLjyjD/7J+bGPwFMw7RfvPNpnvk0f2ypbWwsM9jQeWrTsXl+bfSgDLg7Mjm3opO HpJxQgsLARFWgDehBIQ8B1nccgTfM3PpKxYNblTdH0/3mqgBpI4+Qj7827/GrCjL2iyI u5NZ5lCtHmkelBoVSzqMvg89VdBveFbLCSai7R259PBckLLhEQ3b5O3H4+r7AVCIt/FU EMNQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:references:in-reply-to:from:date :message-id:subject:to:cc; bh=Lu36EvNlVpZLf9vn0AKWWzvCVJacgGfuW8XvxcdcSYc=; b=g6Ax6gbdhrLffUQDHhXpF69RcPPP84dh8OrL9QTeA+Pu/83PMz8v02hcI9Y19+4SCI KgEGSjldytGogRa6hnNDaLEl/nsrveWAW4LFsil9II59Mcopl+hts7M3UupFjPkKhQK5 EOQmhcWK/m3s123P5xdaE/iahhD8V49zr/zNkqhJT+sAFSZyMRXiXWj5cHX/sK4ORlEp vlDHw8i/gWqmXBRIKVhv1GHf8rcPkvlCgVhSUXy1JWqfTBvw/IGJmyo8VoqYcMaxb96w BAAW3SoP/aCbyvTWSG9t/oioJk2o2r8pjFzvaHpyWKT/8qS3a1lrChBAnX3E4B+n6aXC aoXw== X-Gm-Message-State: AOAM532lSnO2k+tCgQEHFxJN8dGZb7fQSZSg5tr/pHem2sIirch1ERO7 HRINgGDV4so0/Ty6YsntTirtdkruGfVaA8vxuhgMtaombn0= X-Google-Smtp-Source: ABdhPJyJVKWY/DkuD0WOWSp91n6+oqxtE7PSXfP+0elLYFTUbM9vBNhdR82o6I8qr+gmA6ORi+kFRielnme1ChDbDUs= X-Received: by 2002:a05:620a:41:: with SMTP id t1mr23814731qkt.322.1614037227122; Mon, 22 Feb 2021 15:40:27 -0800 (PST) MIME-Version: 1.0 References: <20210220173605.GD2858050@casper.infradead.org> In-Reply-To: <20210220173605.GD2858050@casper.infradead.org> From: Peter Geis Date: Mon, 22 Feb 2021 18:40:15 -0500 Message-ID: Subject: Re: [BUG] page allocation failure reading procfs ipv6 configuration files with cgroups To: Matthew Wilcox Cc: Tejun Heo , Zefan Li , Johannes Weiner , Alexey Dobriyan , linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, cgroups@vger.kernel.org Content-Type: text/plain; charset="UTF-8" Precedence: bulk List-ID: X-Mailing-List: linux-fsdevel@vger.kernel.org On Sat, Feb 20, 2021 at 12:36 PM Matthew Wilcox wrote: > > On Sat, Feb 20, 2021 at 12:29:18PM -0500, Peter Geis wrote: > > Good Afternoon, > > > > I have been tracking down a regular bug that triggers when running OpenWRT in a lxd container. > > Every ten minutes I was greeted with the following splat in the kernel log: > > > > [2122311.383389] warn_alloc: 3 callbacks suppressed > > [2122311.383403] cat: page allocation failure: order:5, mode:0x40dc0(GFP_KERNEL|__GFP_COMP|__GFP_ZERO), nodemask=(null),cpuset=lxc.payload.openwrt,mems_allowed=0 > > You want this patch: > > https://lore.kernel.org/linux-fsdevel/6345270a2c1160b89dd5e6715461f388176899d1.1612972413.git.josef@toxicpanda.com/ I've tested this patch against 5.10.17 for 36 hours and can confirm it solves the problem. Thank you.