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=-8.5 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS, URIBL_BLOCKED,USER_AGENT_SANE_1 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 83644C433E2 for ; Wed, 24 Jun 2020 07:57:41 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 6780C2137B for ; Wed, 24 Jun 2020 07:57:41 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2390206AbgFXH5j (ORCPT ); Wed, 24 Jun 2020 03:57:39 -0400 Received: from mx2.suse.de ([195.135.220.15]:35694 "EHLO mx2.suse.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2389965AbgFXH5j (ORCPT ); Wed, 24 Jun 2020 03:57:39 -0400 X-Virus-Scanned: by amavisd-new at test-mx.suse.de Received: from relay2.suse.de (unknown [195.135.221.27]) by mx2.suse.de (Postfix) with ESMTP id BAC60AFD5; Wed, 24 Jun 2020 07:57:37 +0000 (UTC) Subject: Re: [PATCH 9/9] mm, slab/slub: move and improve cache_from_obj() From: Vlastimil Babka To: Andrew Morton Cc: Kees Cook , Christoph Lameter , Pekka Enberg , David Rientjes , Joonsoo Kim , linux-mm@kvack.org, linux-kernel@vger.kernel.org, kernel-team@android.com, vinmenon@codeaurora.org, Matthew Garrett , Roman Gushchin , Jann Horn , Vijayanand Jitta References: <20200610163135.17364-1-vbabka@suse.cz> <20200610163135.17364-10-vbabka@suse.cz> <202006171039.FBDF2D7F4A@keescook> Message-ID: Date: Wed, 24 Jun 2020 09:57:35 +0200 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.9.0 MIME-Version: 1.0 In-Reply-To: Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 6/18/20 12:10 PM, Vlastimil Babka wrote: > ----8<---- > From b8df607d92b37e5329ce7bda62b2b364cc249893 Mon Sep 17 00:00:00 2001 > From: Vlastimil Babka > Date: Thu, 18 Jun 2020 11:52:03 +0200 > Subject: [PATCH] mm, slab/slub: improve error reporting and overhead of > cache_from_obj() > Another small fixup, please. ----8<---- >From 2cd24408828a22a3cd4301afbaf98767b1a14eb1 Mon Sep 17 00:00:00 2001 From: Vlastimil Babka Date: Wed, 24 Jun 2020 09:49:15 +0200 Subject: [PATCH] mm, slab/slub: improve error reporting and overhead of cache_from_obj()-fix The added VM_WARN_ON_ONCE triggers [1] with CONFIG_SLAB, as SLAB_DEBUG_FLAGS doesn't include SLAB_CONSISTENCY_CHECKS. Move the check under #ifdef SLUB_DEBUG. [1] https://lore.kernel.org/r/20200623090213.GW5535@shao2-debian Reported-by: kernel test robot Signed-off-by: Vlastimil Babka --- mm/slab.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/mm/slab.h b/mm/slab.h index 525260217013..e829d9f5e6ef 100644 --- a/mm/slab.h +++ b/mm/slab.h @@ -229,8 +229,8 @@ static inline void print_tracking(struct kmem_cache *s, void *object) */ static inline bool kmem_cache_debug_flags(struct kmem_cache *s, slab_flags_t flags) { - VM_WARN_ON_ONCE(!(flags & SLAB_DEBUG_FLAGS)); #ifdef CONFIG_SLUB_DEBUG + VM_WARN_ON_ONCE(!(flags & SLAB_DEBUG_FLAGS)); if (static_branch_unlikely(&slub_debug_enabled)) return s->flags & flags; #endif -- 2.27.0