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=-0.6 required=3.0 tests=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 82EC6C7619D for ; Thu, 20 Feb 2020 00:37:31 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id 1FFF8206E2 for ; Thu, 20 Feb 2020 00:37:31 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="gDv6jzez" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 1FFF8206E2 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=gmail.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=owner-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix) id A62A96B0005; Wed, 19 Feb 2020 19:37:30 -0500 (EST) Received: by kanga.kvack.org (Postfix, from userid 40) id A12BF6B0006; Wed, 19 Feb 2020 19:37:30 -0500 (EST) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 928196B0007; Wed, 19 Feb 2020 19:37:30 -0500 (EST) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0101.hostedemail.com [216.40.44.101]) by kanga.kvack.org (Postfix) with ESMTP id 7D9486B0005 for ; Wed, 19 Feb 2020 19:37:30 -0500 (EST) Received: from smtpin30.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay03.hostedemail.com (Postfix) with ESMTP id 339708248047 for ; Thu, 20 Feb 2020 00:37:30 +0000 (UTC) X-FDA: 76508641860.30.mass22_73edc9de3105 X-HE-Tag: mass22_73edc9de3105 X-Filterd-Recvd-Size: 4224 Received: from mail-ed1-f66.google.com (mail-ed1-f66.google.com [209.85.208.66]) by imf20.hostedemail.com (Postfix) with ESMTP for ; Thu, 20 Feb 2020 00:37:29 +0000 (UTC) Received: by mail-ed1-f66.google.com with SMTP id p3so31555390edx.7 for ; Wed, 19 Feb 2020 16:37:29 -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=jhSk3mVooBN6nQVNK9FFMeVjZ50afXNqK5h4+bIeQ3A=; b=gDv6jzezI+cTnuaRmW97u7Sfgs+tybuZai0+CCMhH5zJUaK1bLIPG2lsbsW8DWG93A BOPxSKTp+u3ClpiveRPzjM+ckJhCu8ErkHIzi+RWfM5vEAfyllLbZ+iX1vIbWBS8IAYj zLnFkKtGD/ktfe2P8V8Ce+HTOckYLPPA2sbbC5SyVNmMRA0tkxsBqZdkm5kHZ02dD79B HCdRKYnYspYHO8/WnHvmVnwvr41rg7C77yEp902feDtbnCk8HuruWdm0FVfJQh0CfFJO ScIaysDrh17nXVE3ouzkc8T6IfOyRewrrISTMshAnrp6XYtqSsvxHS4Ezpm8Jsf7d72n pD0Q== 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=jhSk3mVooBN6nQVNK9FFMeVjZ50afXNqK5h4+bIeQ3A=; b=NV6AC4+tab6SVYzFkXf+njR+06fXumeGYHaSrJSW0asXBgMkpMoTn86RIVRlNxoJsc CFdfGe0tV7oGMyYfW7YKBQLZ5PFAzmElNIO3qQ2pdnqdTTcht8s98RbjDgGJeLTyAv6T 5NvulLb1TGLPnJgtclJLgWZA/2AUsN3sn2WMP8+6sdyUVBFU1SqkzcMDvgwirItHFa8o 6LDWkp5fXPptCATjZGLVUyLd5NR/C2LVYJRp9jIShvPGGcBUXjt025V6daXk6GNBCKIX bpj3RZDJlj48nIEwzLbccZ2EPq44MeozLYg20Xz7b7n7anyRRu24Tt9MEAw1zWQ/iw3E gR2g== X-Gm-Message-State: APjAAAWXBB5bvLoSnrq/XvPdDuSYT/35/uofsHrXEqkp7Hkxw0Hn7V5z pKjRElaN1TYa0iWAgAGJVmd6mDpBZ4/iH2k8WlM= X-Google-Smtp-Source: APXvYqzS4RB8Rbx4Sp7X20qA3M3iLRhkjMWTLkLK4mmAJg2pXhcZalK3fxp3xcFm2502JCzUpSZJsOYZ02GnKGdIVC0= X-Received: by 2002:a17:906:4e46:: with SMTP id g6mr24993162ejw.309.1582159048437; Wed, 19 Feb 2020 16:37:28 -0800 (PST) MIME-Version: 1.0 References: <20200219144635.3b7417145de19b65f258c943@linux-foundation.org> <20200220002520.GT24185@bombadil.infradead.org> In-Reply-To: <20200220002520.GT24185@bombadil.infradead.org> From: Yang Shi Date: Wed, 19 Feb 2020 16:37:11 -0800 Message-ID: Subject: Re: [Bug 206569] BUG at mm/filemap.c:2529: VM_BUG_ON_PAGE(page_to_pgoff(page) != offset) To: Matthew Wilcox Cc: Andrew Morton , Song Liu , dennis.lissov@gmail.com, bugzilla-daemon@bugzilla.kernel.org, Linux MM Content-Type: text/plain; charset="UTF-8" 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 Wed, Feb 19, 2020 at 4:25 PM Matthew Wilcox wrote: > > On Wed, Feb 19, 2020 at 02:46:35PM -0800, Andrew Morton wrote: > > > > (switched to email. Please respond via emailed reply-to-all, not via the > > bugzilla web interface). > > > > On Wed, 19 Feb 2020 21:33:32 +0000 bugzilla-daemon@bugzilla.kernel.org wrote: > > > > > https://bugzilla.kernel.org/show_bug.cgi?id=206569 > > > > > > --- Comment #1 from Denis Lisov (dennis.lissov@gmail.com) --- > > > Upd. Double-checking my kernel settings I found that I've accidentally enabled > > > experimental CONFIG_READ_ONLY_THP_FOR_FS - may be related to that. > > > > > > In my new kernel build the problem failed to reproduce (I've disabled > > > CONFIG_READ_ONLY_THP_FOR_FS, CONFIG_KSM and switched from > > > CONFIG_TRANSPARENT_HUGEPAGE_ALWAYS to CONFIG_TRANSPARENT_HUGEPAGE_MADVISE - > > > sorry for multiple changes). > > > > Thanks. > > > > Song Liu, could you please take a look? > > This is a compound page ... Dennis, are you willing to apply this patch > https://lore.kernel.org/linux-mm/20200211001536.1027652-12-jhubbard@nvidia.com/ > and retest? It will give us more information about what's going on. page:ffffc9b318af02c0 refcount:0 mapcount:3 mapping:dead000000000400 index:0x60b compound_mapcount: 3 It looks like a tail page. > >