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=-18.0 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER, INCLUDES_PATCH,MAILING_LIST_MULTI,MENTIONS_GIT_HOSTING,SPF_HELO_NONE,SPF_PASS, UNWANTED_LANGUAGE_BODY autolearn=ham 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 AA9D6C433ED for ; Sun, 11 Apr 2021 13:47:18 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 6A1D861027 for ; Sun, 11 Apr 2021 13:47:18 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S236170AbhDKNrb (ORCPT ); Sun, 11 Apr 2021 09:47:31 -0400 Received: from Galois.linutronix.de ([193.142.43.55]:33298 "EHLO galois.linutronix.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S235831AbhDKNoN (ORCPT ); Sun, 11 Apr 2021 09:44:13 -0400 Date: Sun, 11 Apr 2021 13:43:38 -0000 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020; t=1618148619; h=from:from:sender:sender:reply-to:reply-to:subject:subject:date:date: message-id:message-id:to:to:cc:cc:mime-version:mime-version: content-type:content-type: content-transfer-encoding:content-transfer-encoding; bh=f7E1468DirXlMfMgo19qhJQxEB+iDGqhDyGzR6CKc04=; b=J4+kIkaUl9KaZPmanSjA+X6Hmavtmc5xwLB/S0/C/QNrCinjBPKeYYCDmKRVwgDtV7h50z rHp64J8iJEiKGl4tea7mAtthK2lB47actZdB6MMXeN/YEi6URcKX05uH87Gu/U39SaE1pq 922OtUaT+ex6rC5nHC1ZgUmbBU2nhlbetpKR+df/xoh3ADAvxUUFJpXOrnVb5/o7Ft2UPh kB/43Tw3Hp05xuZvFFMayxzyPsIDahq6NRGeTrPR4RB78E+2i+X3UDvI5M11wYvE8G518A f05xDaJ63c1MDIFVkO66G6SuC1ehURFel8oYlwGjiL5UhV6s1PXAZzE9H3TJOw== DKIM-Signature: v=1; a=ed25519-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020e; t=1618148619; h=from:from:sender:sender:reply-to:reply-to:subject:subject:date:date: message-id:message-id:to:to:cc:cc:mime-version:mime-version: content-type:content-type: content-transfer-encoding:content-transfer-encoding; bh=f7E1468DirXlMfMgo19qhJQxEB+iDGqhDyGzR6CKc04=; b=6JR7SjfZ9IoyGQIkKD+xlDzPKV8M1WFLV6OwD/vNQ7ZQzRIzpQkB42a7xBYzADIhDQ6L2c OMXu5+CQpizYfzAQ== From: "tip-bot2 for Paul E. McKenney" Sender: tip-bot2@linutronix.de Reply-to: linux-kernel@vger.kernel.org To: linux-tip-commits@vger.kernel.org Subject: [tip: core/rcu] rcutorture: Add crude tests for mem_dump_obj() Cc: "Paul E. McKenney" , x86@kernel.org, linux-kernel@vger.kernel.org MIME-Version: 1.0 Message-ID: <161814861848.29796.9140894761328925955.tip-bot2@tip-bot2> Robot-ID: Robot-Unsubscribe: Contact to get blacklisted from these emails Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org The following commit has been merged into the core/rcu branch of tip: Commit-ID: 0d3dd2c8eadb7d4404b8788f552fb2b824fe2c7e Gitweb: https://git.kernel.org/tip/0d3dd2c8eadb7d4404b8788f552fb2b824fe2c7e Author: Paul E. McKenney AuthorDate: Mon, 07 Dec 2020 21:23:36 -08:00 Committer: Paul E. McKenney CommitterDate: Mon, 08 Mar 2021 14:18:46 -08:00 rcutorture: Add crude tests for mem_dump_obj() This commit adds a few crude tests for mem_dump_obj() to rcutorture runs. Just to prevent bitrot, you understand! Signed-off-by: Paul E. McKenney --- kernel/rcu/rcutorture.c | 39 +++++++++++++++++++++++++++++++++++++++ mm/slab_common.c | 2 ++ mm/util.c | 1 + 3 files changed, 42 insertions(+) diff --git a/kernel/rcu/rcutorture.c b/kernel/rcu/rcutorture.c index 99657ff..8e93f2e 100644 --- a/kernel/rcu/rcutorture.c +++ b/kernel/rcu/rcutorture.c @@ -1861,6 +1861,45 @@ rcu_torture_stats(void *arg) torture_shutdown_absorb("rcu_torture_stats"); } while (!torture_must_stop()); torture_kthread_stopping("rcu_torture_stats"); + + { + struct rcu_head *rhp; + struct kmem_cache *kcp; + static int z; + + kcp = kmem_cache_create("rcuscale", 136, 8, SLAB_STORE_USER, NULL); + rhp = kmem_cache_alloc(kcp, GFP_KERNEL); + pr_alert("mem_dump_obj() slab test: rcu_torture_stats = %px, &rhp = %px, rhp = %px, &z = %px\n", stats_task, &rhp, rhp, &z); + pr_alert("mem_dump_obj(ZERO_SIZE_PTR):"); + mem_dump_obj(ZERO_SIZE_PTR); + pr_alert("mem_dump_obj(NULL):"); + mem_dump_obj(NULL); + pr_alert("mem_dump_obj(%px):", &rhp); + mem_dump_obj(&rhp); + pr_alert("mem_dump_obj(%px):", rhp); + mem_dump_obj(rhp); + pr_alert("mem_dump_obj(%px):", &rhp->func); + mem_dump_obj(&rhp->func); + pr_alert("mem_dump_obj(%px):", &z); + mem_dump_obj(&z); + kmem_cache_free(kcp, rhp); + kmem_cache_destroy(kcp); + rhp = kmalloc(sizeof(*rhp), GFP_KERNEL); + pr_alert("mem_dump_obj() kmalloc test: rcu_torture_stats = %px, &rhp = %px, rhp = %px\n", stats_task, &rhp, rhp); + pr_alert("mem_dump_obj(kmalloc %px):", rhp); + mem_dump_obj(rhp); + pr_alert("mem_dump_obj(kmalloc %px):", &rhp->func); + mem_dump_obj(&rhp->func); + kfree(rhp); + rhp = vmalloc(4096); + pr_alert("mem_dump_obj() vmalloc test: rcu_torture_stats = %px, &rhp = %px, rhp = %px\n", stats_task, &rhp, rhp); + pr_alert("mem_dump_obj(vmalloc %px):", rhp); + mem_dump_obj(rhp); + pr_alert("mem_dump_obj(vmalloc %px):", &rhp->func); + mem_dump_obj(&rhp->func); + vfree(rhp); + } + return 0; } diff --git a/mm/slab_common.c b/mm/slab_common.c index cec9536..4c6107e 100644 --- a/mm/slab_common.c +++ b/mm/slab_common.c @@ -545,6 +545,7 @@ bool kmem_valid_obj(void *object) page = virt_to_head_page(object); return PageSlab(page); } +EXPORT_SYMBOL_GPL(kmem_valid_obj); /** * kmem_dump_obj - Print available slab provenance information @@ -601,6 +602,7 @@ void kmem_dump_obj(void *object) pr_info(" %pS\n", kp.kp_stack[i]); } } +EXPORT_SYMBOL_GPL(kmem_dump_obj); #endif #ifndef CONFIG_SLOB diff --git a/mm/util.c b/mm/util.c index 2d497fe..c37e24d 100644 --- a/mm/util.c +++ b/mm/util.c @@ -1014,4 +1014,5 @@ void mem_dump_obj(void *object) } pr_cont(" non-slab/vmalloc memory.\n"); } +EXPORT_SYMBOL_GPL(mem_dump_obj); #endif