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bh=6FuCguIw3y1xLD9yHceZ5J55RGlWV/2iWhn/MaGBC+0=; b=hk4BD/AuvOtCAaHSpbeeXav7yciHJ+gdfePS7DN6T76pCPGCKkbXBT7zb0rxqoW3r7IHFv DhDnLMme7ezSF8Cg== 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 997B113DA8; Thu, 5 Aug 2021 15:20:09 +0000 (UTC) Received: from dovecot-director2.suse.de ([192.168.254.65]) by imap2.suse-dmz.suse.de with ESMTPSA id qCjnJKkBDGFDdQAAMHmgww (envelope-from ); Thu, 05 Aug 2021 15:20:09 +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 v4 30/35] mm: slub: Make object_map_lock a raw_spinlock_t Date: Thu, 5 Aug 2021 17:19:55 +0200 Message-Id: <20210805152000.12817-31-vbabka@suse.cz> X-Mailer: git-send-email 2.32.0 In-Reply-To: <20210805152000.12817-1-vbabka@suse.cz> References: <20210805152000.12817-1-vbabka@suse.cz> MIME-Version: 1.0 X-Rspamd-Server: rspam04 X-Rspamd-Queue-Id: BA8E2300037A Authentication-Results: imf09.hostedemail.com; dkim=pass header.d=suse.cz header.s=susede2_rsa header.b=bDrdzJtq; dkim=pass header.d=suse.cz header.s=susede2_ed25519 header.b="hk4BD/Au"; dmarc=none; spf=pass (imf09.hostedemail.com: domain of vbabka@suse.cz designates 195.135.220.29 as permitted sender) smtp.mailfrom=vbabka@suse.cz X-Stat-Signature: u9njoijipbhkgzcpsb836u5efocngmdd X-HE-Tag: 1628176810-884363 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: 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 da48ada3d17f..9cb58d884c58 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)