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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 74236C433FE for ; Tue, 24 May 2022 19:44:11 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S240999AbiEXToJ (ORCPT ); Tue, 24 May 2022 15:44:09 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:51122 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S239067AbiEXToG (ORCPT ); Tue, 24 May 2022 15:44:06 -0400 Received: from mail-qk1-x72f.google.com (mail-qk1-x72f.google.com [IPv6:2607:f8b0:4864:20::72f]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id B325168335 for ; Tue, 24 May 2022 12:44:04 -0700 (PDT) Received: by mail-qk1-x72f.google.com with SMTP id i68so14596298qke.11 for ; Tue, 24 May 2022 12:44:04 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=cmpxchg-org.20210112.gappssmtp.com; s=20210112; h=date:from:to:cc:subject:message-id:references:mime-version :content-disposition:in-reply-to; bh=duLuqB8eb+MaAuTUNyV5BqcfLXI7fybo56wYzXWGIiA=; b=LQjPgH5pYVk+OZLBC5c+2LKzzjOPpoPsmIYf3dAjs7IR7wior+HPhi5DLXc2LN8Drl EoPOpIeoYB26pjGvRbHNNSnA83STJMvJOYq7RdgglpVduRGUsjLWU10mtO5H62JaXoF9 vvdrZTi3UEoCva9nzg8aa+ette30RLNnKvAt1D0z2fJD1n7xhSZUHFvUzyk1gsVM0VGu pEoEpUMwmqNqgZVw0lPpHwqwyrHiZd6uvBB/uBLURbI24NimfrzoT/Ih/EthYiIFc3u+ zvk+RxOEcP5uiATSRbIUpyJOVEjk6lS5kjo/wf6G+dhdXufA7bCE4Qi4FA0Ug0L+2n1p CCJw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:date:from:to:cc:subject:message-id:references :mime-version:content-disposition:in-reply-to; bh=duLuqB8eb+MaAuTUNyV5BqcfLXI7fybo56wYzXWGIiA=; b=ZiGizB1VXdemKjTmPWeQ5KYaQq9Mdf6R9z2ecRcdeyCaYTO2hqroSSgXws292EtZx6 rJJq9VFG6YlmWykfbOYS0DLvzg4EjXRhzCJVu28k4zQ/8bdnt9UpJIo3oKFwXRNtW200 eqbyvJdfmfiq/FS3iEBqvFZw3JL0sTuOtdieXGHN92PnOGZuQxBKrn1SUsesNAZQ1D9D 4AdxlhNoQFPHSnzzO5lv7jF3kRmk2MDcBopOzuOFYittLzNVJu1CmUXiKqnsspnrobiN ey3JA6KtE/AY+reHSXC28D4iHhC7RXH3jX2q3UUgfCvgand4515Vtb+XeTGm9FHM7VV7 f/Bg== X-Gm-Message-State: AOAM530vQ3Ppzm/7Y0+n6JmZx4DTER9JOX4sSoVOt+m57J9I9xweEpBv 3a5U7KXuv+QuxC7hs6TiIwe8wQ== X-Google-Smtp-Source: ABdhPJwTajcKtx2V/QLGvqEuTqKhR5BiouYc6FC4OWgv+ME5gp4jMrmzVH3N6vonhgCQHelCZJf3bQ== X-Received: by 2002:a05:620a:408f:b0:6a0:4fda:b4c9 with SMTP id f15-20020a05620a408f00b006a04fdab4c9mr18131976qko.777.1653421443943; Tue, 24 May 2022 12:44:03 -0700 (PDT) Received: from localhost ([2620:10d:c091:480::1:741f]) by smtp.gmail.com with ESMTPSA id r7-20020ac87947000000b002f3fbf28826sm149560qtt.23.2022.05.24.12.44.03 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 24 May 2022 12:44:03 -0700 (PDT) Date: Tue, 24 May 2022 15:44:02 -0400 From: Johannes Weiner To: Muchun Song Cc: mhocko@kernel.org, roman.gushchin@linux.dev, shakeelb@google.com, cgroups@vger.kernel.org, linux-mm@kvack.org, linux-kernel@vger.kernel.org, duanxiongchun@bytedance.com, longman@redhat.com Subject: Re: [PATCH v4 10/11] mm: lru: add VM_BUG_ON_FOLIO to lru maintenance function Message-ID: References: <20220524060551.80037-1-songmuchun@bytedance.com> <20220524060551.80037-11-songmuchun@bytedance.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20220524060551.80037-11-songmuchun@bytedance.com> Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Tue, May 24, 2022 at 02:05:50PM +0800, Muchun Song wrote: > We need to make sure that the page is deleted from or added to the > correct lruvec list. So add a VM_BUG_ON_FOLIO() to catch invalid > users. > > Signed-off-by: Muchun Song Makes sense, but please use VM_WARN_ON_ONCE_FOLIO() so the machine can continue limping along for extracting debug information.