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=-19.0 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=unavailable 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 36D7EC4332E for ; Thu, 4 Mar 2021 01:00:56 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 1B08664F70 for ; Thu, 4 Mar 2021 01:00:56 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S237573AbhCDBAz (ORCPT ); Wed, 3 Mar 2021 20:00:55 -0500 Received: from mail.kernel.org ([198.145.29.99]:37706 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1447185AbhCDATs (ORCPT ); Wed, 3 Mar 2021 19:19:48 -0500 Received: by mail.kernel.org (Postfix) with ESMTPSA id E3A9C64EDF; Thu, 4 Mar 2021 00:17:30 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1614817051; bh=6wzCHalKqT2clkokLo4omnOXU5pJLA0F5TQZMCcWLXw=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=k/Obcz3f1aVbUXAvmSPSRcjZGU1B0DzIbew3vG4t59pPvKVIsQLG3lDB8kF8/dE3Z 2nOll+zDI1MuyrAbW78SULUHmbNoQTnjrN/m9RqeSCx1j7vXye/WNfjAYQrz2mpq3f JXa17O8QLi6Hf+A59zaUqyj4k1hn60B6TYvOy4GKaQymGQwyPFYfRMHMZDje5Nl+bu dQs/b+23Rel0kHl2229Dx0oLg0ekdVb4TkIEhRgE67nAhMR0+tycM2EkU3g93EOT3E k7rLPparOkER3p1YKYk1aUBmEKeLH3n+KdVfAXLAJ0vrZ8P1KZwqMdv55Dd6ZJKZR2 WGdHtZwFShWKQ== From: paulmck@kernel.org To: linux-mm@kvack.org Cc: cl@linux.com, penberg@kernel.org, rientjes@google.com, iamjoonsoo.kim@lge.com, akpm@linux-foundation.org, kernel-team@fb.com, mingo@kernel.org, rcu@vger.kernel.org, "Paul E. McKenney" Subject: [PATCH tip/core/rcu 2/2] rcutorture: Add crude tests for mem_dump_obj() Date: Wed, 3 Mar 2021 16:17:28 -0800 Message-Id: <20210304001728.23321-2-paulmck@kernel.org> X-Mailer: git-send-email 2.9.5 In-Reply-To: <20210304001623.GA23196@paulmck-ThinkPad-P72> References: <20210304001623.GA23196@paulmck-ThinkPad-P72> Precedence: bulk List-ID: X-Mailing-List: rcu@vger.kernel.org From: "Paul E. McKenney" 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 -- 2.9.5