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 Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id AB347C433F5 for ; Fri, 25 Feb 2022 18:03:59 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232244AbiBYSE3 (ORCPT ); Fri, 25 Feb 2022 13:04:29 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:60346 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232048AbiBYSEZ (ORCPT ); Fri, 25 Feb 2022 13:04:25 -0500 Received: from smtp-out1.suse.de (smtp-out1.suse.de [195.135.220.28]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id CEAC12510FD for ; Fri, 25 Feb 2022 10:03:52 -0800 (PST) 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 633A3212C3; Fri, 25 Feb 2022 18:03:51 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=suse.cz; s=susede2_rsa; t=1645812231; 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=Wbzb6rwe8BeYvrev9nqwEXLhWRFFA+vAEVQGD0RO8YQ=; b=yZIpqxaoqBAAGu78WfynY6RE/QeIasdv8y41xCLA172w16Hrmg2D1Ok5L9f3PYpp6EsEqn bh/Z5Co+xzyt9p30RxcgKkTUV/IjoPvsITEiEpZ6w98ufyVFwDxpPi9R3zs1+rmTosDRfo RtxgHdevfR4JidJiOdixd3i1oivM5Y4= DKIM-Signature: v=1; a=ed25519-sha256; c=relaxed/relaxed; d=suse.cz; s=susede2_ed25519; t=1645812231; 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=Wbzb6rwe8BeYvrev9nqwEXLhWRFFA+vAEVQGD0RO8YQ=; b=zOu/LTYva8llbVLt23byI4J6oSyX/461yzWGb3GEY3aaNptsxCtR43jeJ9ihZBVH3uXgpa XkQiQrL9PvhMqqAQ== 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 3766113EA7; Fri, 25 Feb 2022 18:03:51 +0000 (UTC) Received: from dovecot-director2.suse.de ([192.168.254.65]) by imap2.suse-dmz.suse.de with ESMTPSA id CMbyDAcaGWKSRQAAMHmgww (envelope-from ); Fri, 25 Feb 2022 18:03:51 +0000 From: Vlastimil Babka To: David Rientjes , Christoph Lameter , Joonsoo Kim , Pekka Enberg , Roman Gushchin Cc: Andrew Morton , linux-mm@kvack.org, patches@lists.linux.dev, linux-kernel@vger.kernel.org, Oliver Glitta , Faiyaz Mohammed , Vlastimil Babka Subject: [PATCH 1/5] mm/slub: move struct track init out of set_track() Date: Fri, 25 Feb 2022 19:03:14 +0100 Message-Id: <20220225180318.20594-2-vbabka@suse.cz> X-Mailer: git-send-email 2.35.1 In-Reply-To: <20220225180318.20594-1-vbabka@suse.cz> References: <20220225180318.20594-1-vbabka@suse.cz> MIME-Version: 1.0 X-Developer-Signature: v=1; a=openpgp-sha256; l=1979; h=from:subject; bh=+MXYxk+IxU7wPrbf4fe94giU090LakTiC0p9f3LDPs0=; b=owGbwMvMwMH4QPFU8cfOlQKMp9WSGJIkJR/yBC2Ve3i3Y8P/WY8P1spXt4Vk5mm7MpUnZBuUaPQm b/DrZDRmYWDkYJAVU2Tp9Z7MuNL0scQ+j7gzMINYmUCmMHBxCsCN1uBgmPpMuFjBj4VN/5dLzY7aZp PwY8kdBS587DH6ttX/ZNJ2Vmt8b//sb+TBqbv8xAWf/pfZ79kPOm7+/tj6/tH1cX9V+Sfej2adIn5x U4LPN5XStOvBcttLmHpqPu19YKShum+LkNYTLoeVbw88XO79NvXH1VNBirp7hBJWr+PL8Q2yFZy6VO Z2qu6VvC+XVu+S67ox4+CjheHuH1p9/h85POPipoPTw3k2PL3u3xc5Z//M3vL0nUzBkSfiS+ZJvfzm 086gbbTiROeSg5yWG4xO37z9uUBzh0vkSV6pH10BjNmhUdH3Hr715bhZuNWjZ7IdM1u97nabk0s2al tvMd6ssYo3rdnEv8z5XYf7tYaJAA== X-Developer-Key: i=vbabka@suse.cz; a=openpgp; fpr=A940D434992C2E8E99103D50224FA7E7CC82A664 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org set_track() either zeroes out the struct track or fills it, depending on the addr parameter. This is unnecessary as there's only one place that calls it for the initialization - init_tracking(). We can simply do the zeroing there, with a single memset() that covers both TRACK_ALLOC and TRACK_FREE as they are adjacent. Signed-off-by: Vlastimil Babka --- mm/slub.c | 32 +++++++++++++++----------------- 1 file changed, 15 insertions(+), 17 deletions(-) diff --git a/mm/slub.c b/mm/slub.c index 261474092e43..1fc451f4fe62 100644 --- a/mm/slub.c +++ b/mm/slub.c @@ -729,34 +729,32 @@ static void set_track(struct kmem_cache *s, void *object, { struct track *p = get_track(s, object, alloc); - if (addr) { #ifdef CONFIG_STACKTRACE - unsigned int nr_entries; + unsigned int nr_entries; - metadata_access_enable(); - nr_entries = stack_trace_save(kasan_reset_tag(p->addrs), - TRACK_ADDRS_COUNT, 3); - metadata_access_disable(); + metadata_access_enable(); + nr_entries = stack_trace_save(kasan_reset_tag(p->addrs), + TRACK_ADDRS_COUNT, 3); + metadata_access_disable(); - if (nr_entries < TRACK_ADDRS_COUNT) - p->addrs[nr_entries] = 0; + if (nr_entries < TRACK_ADDRS_COUNT) + p->addrs[nr_entries] = 0; #endif - p->addr = addr; - p->cpu = smp_processor_id(); - p->pid = current->pid; - p->when = jiffies; - } else { - memset(p, 0, sizeof(struct track)); - } + p->addr = addr; + p->cpu = smp_processor_id(); + p->pid = current->pid; + p->when = jiffies; } static void init_tracking(struct kmem_cache *s, void *object) { + struct track *p; + if (!(s->flags & SLAB_STORE_USER)) return; - set_track(s, object, TRACK_FREE, 0UL); - set_track(s, object, TRACK_ALLOC, 0UL); + p = get_track(s, object, TRACK_ALLOC); + memset(p, 0, 2*sizeof(struct track)); } static void print_track(const char *s, struct track *t, unsigned long pr_time) -- 2.35.1