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 45205C4338F for ; Mon, 23 Aug 2021 14:59:04 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 2E14A613A7 for ; Mon, 23 Aug 2021 14:59:04 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231424AbhHWO7o (ORCPT ); Mon, 23 Aug 2021 10:59:44 -0400 Received: from smtp-out1.suse.de ([195.135.220.28]:51574 "EHLO smtp-out1.suse.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230447AbhHWO7V (ORCPT ); Mon, 23 Aug 2021 10:59:21 -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 6AADF21FD3; Mon, 23 Aug 2021 14:58:38 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=suse.cz; s=susede2_rsa; t=1629730718; 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=sFCcoMvxlq/w8r+8Gue5zDwhFgUskBNJ4QZQVKgAZYc=; b=hI1oi1i6cgOPivy1WyQgwJ5tiDCEVuWjJe15bai+s0Y1EjK4FG7Jb0yNZVcXWanT+SbHhY 7T0b3jnAQVkVezEo2G+EIW+F5vn4Amjlw3+9guAgBh3P5LxAnmM3Wq4z+DumvzS/1UJaeq +v48lRYYbrYbOaR5YgB7GViVrdmXfhQ= DKIM-Signature: v=1; a=ed25519-sha256; c=relaxed/relaxed; d=suse.cz; s=susede2_ed25519; t=1629730718; 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=sFCcoMvxlq/w8r+8Gue5zDwhFgUskBNJ4QZQVKgAZYc=; b=yGKBnLg8P/VtDaN2Pp5o9jRduL948hit7QawLWk9iydy2yYx7gMrDUbko6CNUbNDGNAY4N OsbHARKn+ZwYk7DQ== 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 43CCE13BE0; Mon, 23 Aug 2021 14:58:38 +0000 (UTC) Received: from dovecot-director2.suse.de ([192.168.254.65]) by imap2.suse-dmz.suse.de with ESMTPSA id oNX8D563I2EFQQAAMHmgww (envelope-from ); Mon, 23 Aug 2021 14:58:38 +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 04/35] mm, slub: don't disable irq for debug_check_no_locks_freed() Date: Mon, 23 Aug 2021 16:57:55 +0200 Message-Id: <20210823145826.3857-5-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 In slab_free_hook() we disable irqs around the debug_check_no_locks_freed() call, which is unnecessary, as irqs are already being disabled inside the call. This seems to be leftover from the past where there were more calls inside the irq disabled sections. Remove the irq disable/enable operations. Mel noted: > Looks like it was needed for kmemcheck which went away back in 4.15 Signed-off-by: Vlastimil Babka Acked-by: Mel Gorman --- mm/slub.c | 14 +------------- 1 file changed, 1 insertion(+), 13 deletions(-) diff --git a/mm/slub.c b/mm/slub.c index 4697280130f2..fee093db2bfd 100644 --- a/mm/slub.c +++ b/mm/slub.c @@ -1591,20 +1591,8 @@ static __always_inline bool slab_free_hook(struct kmem_cache *s, { kmemleak_free_recursive(x, s->flags); - /* - * Trouble is that we may no longer disable interrupts in the fast path - * So in order to make the debug calls that expect irqs to be - * disabled we need to disable interrupts temporarily. - */ -#ifdef CONFIG_LOCKDEP - { - unsigned long flags; + debug_check_no_locks_freed(x, s->object_size); - local_irq_save(flags); - debug_check_no_locks_freed(x, s->object_size); - local_irq_restore(flags); - } -#endif if (!(s->flags & SLAB_DEBUG_OBJECTS)) debug_check_no_obj_freed(x, s->object_size); -- 2.32.0