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 6ECA4C63684 for ; Wed, 26 Jan 2022 18:36:43 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229980AbiAZSgm (ORCPT ); Wed, 26 Jan 2022 13:36:42 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:60768 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230424AbiAZSgk (ORCPT ); Wed, 26 Jan 2022 13:36:40 -0500 Received: from mail-qv1-xf2a.google.com (mail-qv1-xf2a.google.com [IPv6:2607:f8b0:4864:20::f2a]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 8BC40C06161C for ; Wed, 26 Jan 2022 10:36:40 -0800 (PST) Received: by mail-qv1-xf2a.google.com with SMTP id i19so597497qvx.12 for ; Wed, 26 Jan 2022 10:36:40 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=soleen.com; s=google; h=from:to:subject:date:message-id:mime-version :content-transfer-encoding; bh=a4jxpLDSedySyiIRtZviJmX3NEbTJyD67N5MQRypTW4=; b=h4xkZoFvH7iJDfUXQm8znpFEc6PC4s+tPROBi0jwbzFdezVF74R3DKaPnWdHLdOtoc vlMKDt3P48E110Jh7Anz+LurpmyWB0G52b6QQ1EaRtDaL1nhcqg04hES0HdEtmqvBxSJ 2c799pa2UtMjpZlRATILhE8KJyjmZVH7VQ05PDArfwetmSwAPYO7mXnQwony0pjCCny0 tu9U2t0OfPWoqAaMSdCnCUm9uVOrJUVtaqVD+7Wk3buw+IBNSO+FAr7Zq8CukabBp7+w hEC4Mf98vxoxOlZNSig54sbYNmpaKk1uEfetnfov5Ttpc29zRvWDY1Q5Wuv8bWglzYHb EMKg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:from:to:subject:date:message-id:mime-version :content-transfer-encoding; bh=a4jxpLDSedySyiIRtZviJmX3NEbTJyD67N5MQRypTW4=; b=wzVDIIEBTSu/akbojzLIh21TxsXLfO69eX/xxPtsbJjeyYZvJyb4GdDEVJyhjR793M l2fL09lbnB3hWy/lqx69NEcWn6eRvb9jG2luCQndTjTGMeUGig46Y+BeWbdWseayVjCo Ww20EI54t3FuIvnkWTmbefZ72MiFcY4RPIexI9Qu0jLfNdYUSKrHj6Bav+hQC1n3IycC S9t48reAPWEltzHvfWYN6xEXKEVsxymYLS5bsa/MvFzgVAFSm+iaHkQfN6xllm9P7bjE v/JfAvRX1jZzNHeS1KEUP400QVeJ5Z/OOyZuE71ShhheXMBRH6c39c+UzHZpvMHlcmxb aaeQ== X-Gm-Message-State: AOAM533rYy1JHmfQBHW5xeYwpTPqFhaJlXva+0Hvb0bkljJ2zEQIUjzb 2p9emKSF7EA4N78fvgMS5VshXA== X-Google-Smtp-Source: ABdhPJz5AdoQSF76RU52VZ6gwOZf8Oqw8CGR3SV0rJAznxxoLsdi7kYebbkAsr0hK4EkKj/v6JtwEQ== X-Received: by 2002:a05:6214:4014:: with SMTP id kd20mr12158585qvb.84.1643222199674; Wed, 26 Jan 2022 10:36:39 -0800 (PST) Received: from soleen.c.googlers.com.com (189.216.85.34.bc.googleusercontent.com. [34.85.216.189]) by smtp.gmail.com with ESMTPSA id h9sm26226qkp.75.2022.01.26.10.36.38 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 26 Jan 2022 10:36:39 -0800 (PST) From: Pasha Tatashin To: pasha.tatashin@soleen.com, linux-kernel@vger.kernel.org, linux-mm@kvack.org, akpm@linux-foundation.org, rientjes@google.com, pjt@google.com, weixugc@google.com, gthelen@google.com, mingo@redhat.com, will@kernel.org, rppt@kernel.org, dave.hansen@linux.intel.com, hpa@zytor.com, aneesh.kumar@linux.ibm.com, jirislaby@kernel.org, songmuchun@bytedance.com, qydwhotmail@gmail.com, hughd@google.com, ziy@nvidia.com, anshuman.khandual@arm.com Subject: [PATCH v4 0/4] page table check fixes and cleanups Date: Wed, 26 Jan 2022 18:36:33 +0000 Message-Id: <20220126183637.1840960-1-pasha.tatashin@soleen.com> X-Mailer: git-send-email 2.35.0.rc0.227.g00780c9af4-goog MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Changelog: v4: - Addressed review comments from David Rientjes - Added Acks. v3: - Resolved a regression introduced in previous version, where page collapse in khugepaged would cause crash on boot. - Addressed comments from Anshuman Khandual regarding commit log. v2: - Addressed simplification comments from Wei Xu - Added Review-by/Tested-by's from Zi Yan and Wei Xu Two fixes: mm/debug_vm_pgtable: remove pte entry from the page table - remove a pte entry from the page table at the end of debug_vm_pgtable pte test mm/khugepaged: unify collapse pmd clear, flush and free mm/page_table_check: check entries at pmd levels - check pmd level in page_table_check for PTE regular entries prior to freeing. repro.c: https://gist.github.com/soleen/fdcd501d5df103976245fe84e9535087 config: https://gist.github.com/soleen/8a56f923c2fea9ce9c75b4e2517d4162 qemu_script: https://gist.github.com/soleen/f4be4795826b7ab1a51ae659582e179c base image: https://storage.googleapis.com/syzkaller/wheezy.img https://storage.googleapis.com/syzkaller/wheezy.img.key Small cleanup: mm/page_table_check: use unsigned long for page counters and cleanup Previous versions: v1: https://lore.kernel.org/all/20220120042513.1648831-1-pasha.tatashin@soleen.com v2: https://lore.kernel.org/all/20220120191250.2671557-1-pasha.tatashin@soleen.com v3: https://lore.kernel.org/all/20220126060514.1574935-1-pasha.tatashin@soleen.com Pasha Tatashin (4): mm/debug_vm_pgtable: remove pte entry from the page table mm/page_table_check: use unsigned long for page counters and cleanup mm/khugepaged: unify collapse pmd clear, flush and free mm/page_table_check: check entries at pmd levels include/linux/page_table_check.h | 18 ++++++++++ mm/debug_vm_pgtable.c | 2 ++ mm/khugepaged.c | 37 ++++++++++++--------- mm/page_table_check.c | 56 ++++++++++++++++---------------- 4 files changed, 69 insertions(+), 44 deletions(-) -- 2.35.0.rc0.227.g00780c9af4-goog