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 kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by smtp.lore.kernel.org (Postfix) with ESMTP id 1BCEDC41513 for ; Wed, 2 Aug 2023 03:46:01 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id 17788280120; Tue, 1 Aug 2023 23:46:01 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id 15C54280121; Tue, 1 Aug 2023 23:46:01 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 01686280120; Tue, 1 Aug 2023 23:46:00 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from relay.hostedemail.com (smtprelay0013.hostedemail.com [216.40.44.13]) by kanga.kvack.org (Postfix) with ESMTP id E2CD8280112 for ; Tue, 1 Aug 2023 23:46:00 -0400 (EDT) Received: from smtpin13.hostedemail.com (a10.router.float.18 [10.200.18.1]) by unirelay03.hostedemail.com (Postfix) with ESMTP id B09CEA0639 for ; Wed, 2 Aug 2023 03:46:00 +0000 (UTC) X-FDA: 81077776080.13.19B09EA Received: from dggsgout11.his.huawei.com (unknown [45.249.212.51]) by imf01.hostedemail.com (Postfix) with ESMTP id 1AA3E4000B for ; Wed, 2 Aug 2023 03:45:57 +0000 (UTC) Authentication-Results: imf01.hostedemail.com; dkim=none; spf=none (imf01.hostedemail.com: domain of thunder.leizhen@huaweicloud.com has no SPF policy when checking 45.249.212.51) smtp.mailfrom=thunder.leizhen@huaweicloud.com; dmarc=none ARC-Seal: i=1; s=arc-20220608; d=hostedemail.com; t=1690947959; a=rsa-sha256; cv=none; b=yekJ5j8EiM4zgsZC5UKPJmytPXHXYs1beWPgOa4BFG8jlLWBgqxZnu6+6p8wB52xdJkjWd 6bJb3zAxXEcREYzPY/Tz0hoHTfM/bR9rBumcQI1ZeCMyivsAalFx/bDWLPtzbm4HvCLVeE /rezcUBrBF3iBPW3MfVY8nJFitFf8dc= ARC-Authentication-Results: i=1; imf01.hostedemail.com; dkim=none; spf=none (imf01.hostedemail.com: domain of thunder.leizhen@huaweicloud.com has no SPF policy when checking 45.249.212.51) smtp.mailfrom=thunder.leizhen@huaweicloud.com; dmarc=none ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=hostedemail.com; s=arc-20220608; t=1690947959; h=from:from:sender:reply-to:subject:subject:date:date: message-id:message-id:to:to:cc:mime-version:mime-version:content-type: content-transfer-encoding:content-transfer-encoding:in-reply-to: references; bh=5iCqvjmxCDP3mkhBUO5/CouJNlUJU+57/pDHZsxkGgk=; b=HKLnuBQdIhMnqMbfGmN4yJ0tfHfVhhqMQ899tvvE8lMPPsqp+Pw1RNlUmoVjaYKshvbr+a S25GqQRrw+EvGc04qjDtk/ParoFG4+4CCQlCQDwWMHC7LWsjpB28Nu857bjLyu8cLAkDKJ VJxi7W0PUWsHuItu/5/8maSeqgW/3nk= Received: from mail02.huawei.com (unknown [172.30.67.143]) by dggsgout11.his.huawei.com (SkyGuard) with ESMTP id 4RFyYq2m7fz4f3p12 for ; Wed, 2 Aug 2023 11:45:51 +0800 (CST) Received: from huaweicloud.com (unknown [10.174.178.55]) by APP4 (Coremail) with SMTP id gCh0CgD3X7Nq0clky7F2PQ--.46299S4; Wed, 02 Aug 2023 11:45:51 +0800 (CST) From: thunder.leizhen@huaweicloud.com To: Christoph Lameter , Pekka Enberg , David Rientjes , Joonsoo Kim , Andrew Morton , Vlastimil Babka , Roman Gushchin , Hyeonggon Yoo <42.hyeyoo@gmail.com>, linux-mm@kvack.org, "Paul E . McKenney" , Frederic Weisbecker , Neeraj Upadhyay , Joel Fernandes , Josh Triplett , Boqun Feng , Steven Rostedt , Mathieu Desnoyers , Lai Jiangshan , Zqiang , rcu@vger.kernel.org, linux-kernel@vger.kernel.org, openeuler Subject: [PATCH v3 0/2] rcu: Dump memory object info if callback function is invalid Date: Wed, 2 Aug 2023 11:45:15 +0800 Message-Id: <20230802034518.1115-1-thunder.leizhen@huaweicloud.com> X-Mailer: git-send-email 2.37.3.windows.1 MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-CM-TRANSID:gCh0CgD3X7Nq0clky7F2PQ--.46299S4 X-Coremail-Antispam: 1UD129KBjvdXoW7Wr1DKr1rGrWUZF4DZrW8Zwb_yoWkurXEq3 40q348Xr47XF1xAF1ayFWxXryDCr4kCas2y3y3Kw4Syry3Xa1fZw4DJFn8Za48Za1vyrsF kr93Ar9rK3srXjkaLaAFLSUrUUUUUb8apTn2vfkv8UJUUUU8Yxn0WfASr-VFAUDa7-sFnT 9fnUUIcSsGvfJTRUUUbxxYFVCjjxCrM7AC8VAFwI0_Xr0_Wr1l1xkIjI8I6I8E6xAIw20E Y4v20xvaj40_JFC_Wr1l1IIY67AEw4v_Jr0_Jr4l8cAvFVAK0II2c7xJM28CjxkF64kEwV A0rcxSw2x7M28EF7xvwVC0I7IYx2IY67AKxVWDJVCq3wA2z4x0Y4vE2Ix0cI8IcVCY1x02 67AKxVW8Jr0_Cr1UM28EF7xvwVC2z280aVAFwI0_GcCE3s1l84ACjcxK6I8E87Iv6xkF7I 0E14v26rxl6s0DM2AIxVAIcxkEcVAq07x20xvEncxIr21l5I8CrVACY4xI64kE6c02F40E x7xfMcIj6xIIjxv20xvE14v26r1j6r18McIj6I8E87Iv67AKxVWUJVW8JwAm72CE4IkC6x 0Yz7v_Jr0_Gr1lF7xvr2IYc2Ij64vIr41lFIxGxcIEc7CjxVA2Y2ka0xkIwI1lw4CEc2x0 rVAKj4xxMxAIw28IcxkI7VAKI48JMxC20s026xCaFVCjc4AY6r1j6r4UMI8I3I0E5I8CrV AFwI0_Jr0_Jr4lx2IqxVCjr7xvwVAFwI0_JrI_JrWlx4CE17CEb7AF67AKxVW8ZVWrXwCI c40Y0x0EwIxGrwCI42IY6xIIjxv20xvE14v26r1j6r1xMIIF0xvE2Ix0cI8IcVCY1x0267 AKxVW8JVWxJwCI42IY6xAIw20EY4v20xvaj40_WFyUJVCq3wCI42IY6I8E87Iv67AKxVWU JVW8JwCI42IY6I8E87Iv6xkF7I0E14v26r4j6r4UJbIYCTnIWIevJa73UjIFyTuYvjxUwV bkUUUUU X-CM-SenderInfo: hwkx0vthuozvpl2kv046kxt4xhlfz01xgou0bp/ X-CFilter-Loop: Reflected X-Rspam-User: X-Rspamd-Server: rspam06 X-Rspamd-Queue-Id: 1AA3E4000B X-Stat-Signature: fep8ukeqyu7sxen7q3qoigwhc87868hq X-HE-Tag: 1690947957-545865 X-HE-Meta: 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 Y6mvdAWV /TDw8pF+DH3lQ1xT8pUTt0Xr/Uytn6aYVflulh8ifFXag01q1d4737cEqL5VQg6wPACRrEPjnhdTV1BrqyAj9yDlLJkyFnxoI+TYyS29RuJhXHMUqj+BmrjKriOzmWdMflubTd0DYTXvLVdv4RxVI0Y7vxQVcXTnFg0bmESS0W175YscqpjVuq38kKEbukq5OHSyQ1pFX4hUV1cVyVt8pO57G18vFUugHusHSdCE4dTncB5u37Z1lH8E1vKHKI3DYjbl/XMo+C4S0NHuhgdiNPAfMlUvhuqEuUMhqn5wIMJA93roA2DH2G6yAfVG2CiMx1DPavOdQ2FMvTqk= 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: From: Zhen Lei v2 --> v3: 1. I made statistics about the source of 'rhp'. kmem_valid_obj() accounts for more than 97.5%, and vmalloc accounts for less than 1%. So change call mem_dump_obj() to call kmem_dump_obj() can meet debugging requirements and avoid the potential deadlock risk of vmalloc_dump_obj(). - mem_dump_obj(rhp); + if (kmem_valid_obj(rhp)) + kmem_dump_obj(rhp); The discussion about vmap_area_lock deadlock in v2: https://lkml.org/lkml/2022/11/11/493 2. Provide static inline empty functions for kmem_valid_obj() and kmem_dump_obj() when CONFIG_PRINTK=n. v1 --> v2: 1. Remove condition "(unsigned long)rhp->func & 0x3", it have problems on x86. 2. Paul E. McKenney helped me update the commit message, thanks. Zhen Lei (2): mm: Provide empty function for kmem_dump_obj() when CONFIG_PRINTK=n rcu: Dump memory object info if callback function is invalid include/linux/slab.h | 3 +++ kernel/rcu/rcu.h | 9 +++++++++ kernel/rcu/srcutiny.c | 1 + kernel/rcu/srcutree.c | 1 + kernel/rcu/tasks.h | 1 + kernel/rcu/tiny.c | 1 + kernel/rcu/tree.c | 1 + 7 files changed, 17 insertions(+) -- 2.34.1