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=-18.8 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,SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT 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 CB266C432BE for ; Mon, 23 Aug 2021 15:01:20 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id A8FA66120A for ; Mon, 23 Aug 2021 15:01:20 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231298AbhHWPCC (ORCPT ); Mon, 23 Aug 2021 11:02:02 -0400 Received: from smtp-out1.suse.de ([195.135.220.28]:52008 "EHLO smtp-out1.suse.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231226AbhHWO70 (ORCPT ); Mon, 23 Aug 2021 10:59:26 -0400 Received: from imap2.suse-dmz.suse.de (imap2.suse-dmz.suse.de [192.168.254.74]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (P-521) server-digest SHA512) (No client certificate requested) by smtp-out1.suse.de (Postfix) with ESMTPS id 06D6521FF8; Mon, 23 Aug 2021 14:58:43 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=suse.cz; s=susede2_rsa; t=1629730723; h=from:from:reply-to:date:date:message-id:message-id:to:to:cc:cc: mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=RKbjTsGL/sZd7BRtWfQEKPPEG+aq7lTvp6VB7a9B72k=; b=XLQNtETN+Q4IMpJbN4vB6PiNQDxs+IeTlk8NWRZ7gKaZlncec5kFlBIFkRGfdN+H1GrGRa SSBgTHKcJGoNR8tKG5+Rb9Jws7oWPApYd0zAyWrjcMYfeRDSEf6rtIB+NZy1aCeHfqcVU/ mMs24C881yVHKxXPHhfhhSkWpNe8Qvc= DKIM-Signature: v=1; a=ed25519-sha256; c=relaxed/relaxed; d=suse.cz; s=susede2_ed25519; t=1629730723; h=from:from:reply-to:date:date:message-id:message-id:to:to:cc:cc: mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=RKbjTsGL/sZd7BRtWfQEKPPEG+aq7lTvp6VB7a9B72k=; b=oUjuPP0nBypw9nz02pQ1n5Y5eKFVVvvvUrR1GsNR063vnUwwiH2RedVzCZXl3OSlov9t/U at7u7KEloelDdfBQ== Received: from imap2.suse-dmz.suse.de (imap2.suse-dmz.suse.de [192.168.254.74]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (P-521) server-digest SHA512) (No client certificate requested) by imap2.suse-dmz.suse.de (Postfix) with ESMTPS id D0FDF13BE0; Mon, 23 Aug 2021 14:58:42 +0000 (UTC) Received: from dovecot-director2.suse.de ([192.168.254.65]) by imap2.suse-dmz.suse.de with ESMTPSA id 4EEzMqK3I2EFQQAAMHmgww (envelope-from ); Mon, 23 Aug 2021 14:58:42 +0000 From: Vlastimil Babka To: Andrew Morton , Christoph Lameter , David Rientjes , Pekka Enberg , Joonsoo Kim Cc: linux-mm@kvack.org, linux-kernel@vger.kernel.org, Mike Galbraith , Sebastian Andrzej Siewior , Thomas Gleixner , Mel Gorman , Jesper Dangaard Brouer , Jann Horn , Vlastimil Babka Subject: [PATCH v5 30/35] mm: slub: Make object_map_lock a raw_spinlock_t Date: Mon, 23 Aug 2021 16:58:21 +0200 Message-Id: <20210823145826.3857-31-vbabka@suse.cz> X-Mailer: git-send-email 2.32.0 In-Reply-To: <20210823145826.3857-1-vbabka@suse.cz> References: <20210823145826.3857-1-vbabka@suse.cz> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Sebastian Andrzej Siewior The variable object_map is protected by object_map_lock. The lock is always acquired in debug code and within already atomic context Make object_map_lock a raw_spinlock_t. Signed-off-by: Sebastian Andrzej Siewior Signed-off-by: Vlastimil Babka --- mm/slub.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) diff --git a/mm/slub.c b/mm/slub.c index 29d71ae20c90..b4e0efbcb709 100644 --- a/mm/slub.c +++ b/mm/slub.c @@ -438,7 +438,7 @@ static inline bool cmpxchg_double_slab(struct kmem_cache *s, struct page *page, #ifdef CONFIG_SLUB_DEBUG static unsigned long object_map[BITS_TO_LONGS(MAX_OBJS_PER_PAGE)]; -static DEFINE_SPINLOCK(object_map_lock); +static DEFINE_RAW_SPINLOCK(object_map_lock); static void __fill_map(unsigned long *obj_map, struct kmem_cache *s, struct page *page) @@ -483,7 +483,7 @@ static unsigned long *get_map(struct kmem_cache *s, struct page *page) { VM_BUG_ON(!irqs_disabled()); - spin_lock(&object_map_lock); + raw_spin_lock(&object_map_lock); __fill_map(object_map, s, page); @@ -493,7 +493,7 @@ static unsigned long *get_map(struct kmem_cache *s, struct page *page) static void put_map(unsigned long *map) __releases(&object_map_lock) { VM_BUG_ON(map != object_map); - spin_unlock(&object_map_lock); + raw_spin_unlock(&object_map_lock); } static inline unsigned int size_from_object(struct kmem_cache *s) -- 2.32.0