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=-6.8 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED autolearn=no 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 77B95C433E7 for ; Tue, 13 Oct 2020 23:48:49 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 41B7C22200 for ; Tue, 13 Oct 2020 23:48:49 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1602632929; bh=pV0iKWeDUNtw/1LML0Opzg6KzB9DFJPmOh5QkG5IfB8=; h=Date:From:To:Subject:In-Reply-To:Reply-To:List-ID:From; b=x/RSeneSFnBJw6u7KrJHqEhkpx5MNM9+ifhl2laSIAbLREdhTkXH+mr2x0CwUdepU yql9HAokAZbzg9mAxccnpqdDGGRC0MJQSbabhWaCuURXkg75mxsIprfeGtrMjmRsgk U6VN8biUxENeEyR2SZiOfOfxc8QtpPv27C8ymXio= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727684AbgJMXst (ORCPT ); Tue, 13 Oct 2020 19:48:49 -0400 Received: from mail.kernel.org ([198.145.29.99]:60334 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727154AbgJMXss (ORCPT ); Tue, 13 Oct 2020 19:48:48 -0400 Received: from localhost.localdomain (c-73-231-172-41.hsd1.ca.comcast.net [73.231.172.41]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 7BEB121D81; Tue, 13 Oct 2020 23:48:47 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1602632927; bh=pV0iKWeDUNtw/1LML0Opzg6KzB9DFJPmOh5QkG5IfB8=; h=Date:From:To:Subject:In-Reply-To:From; b=ozKj6mlpwwWFxT3fqnuWpj+F1qO2zsfZf8feO6jE6DKTFJh726ZObGesSa8C/eGVN CrC8Pjya7j2MxUrq1XSOSfgkvXPKypTcWRqrHD1RQL0TCXziG7bCd+o8vIOq49lSMn 7hDQNydVKw3WJoungFcBYx1BwPYNMc0tlCbCeOjc= Date: Tue, 13 Oct 2020 16:48:47 -0700 From: Andrew Morton To: akpm@linux-foundation.org, cl@linux.com, iamjoonsoo.kim@lge.com, linux-mm@kvack.org, liu.xiang6@zte.com.cn, mm-commits@vger.kernel.org, penberg@kernel.org, rientjes@google.com, torvalds@linux-foundation.org, wuyun.wu@huawei.com Subject: [patch 023/181] mm/slub: make add_full() condition more explicit Message-ID: <20201013234847.01El79qe1%akpm@linux-foundation.org> In-Reply-To: <20201013164658.3bfd96cc224d8923e66a9f4e@linux-foundation.org> User-Agent: s-nail v14.8.16 Precedence: bulk Reply-To: linux-kernel@vger.kernel.org List-ID: X-Mailing-List: mm-commits@vger.kernel.org From: Abel Wu Subject: mm/slub: make add_full() condition more explicit The commit below is incomplete, as it didn't handle the add_full() part. commit a4d3f8916c65 ("slub: remove useless kmem_cache_debug() before remove_full()") This patch checks for SLAB_STORE_USER instead of kmem_cache_debug(), since that should be the only context in which we need the list_lock for add_full(). Link: https://lkml.kernel.org/r/20200811020240.1231-1-wuyun.wu@huawei.com Signed-off-by: Abel Wu Cc: Christoph Lameter Cc: Pekka Enberg Cc: David Rientjes Cc: Joonsoo Kim Cc: Liu Xiang Signed-off-by: Andrew Morton --- mm/slub.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) --- a/mm/slub.c~mm-slub-make-add_full-condition-more-explicit +++ a/mm/slub.c @@ -2245,7 +2245,8 @@ redo: } } else { m = M_FULL; - if (kmem_cache_debug(s) && !lock) { +#ifdef CONFIG_SLUB_DEBUG + if ((s->flags & SLAB_STORE_USER) && !lock) { lock = 1; /* * This also ensures that the scanning of full @@ -2254,6 +2255,7 @@ redo: */ spin_lock(&n->list_lock); } +#endif } if (l != m) { _