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=-7.4 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI, NICE_REPLY_A,SPF_HELO_NONE,SPF_PASS,USER_AGENT_SANE_1 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 65812C4320A for ; Thu, 29 Jul 2021 15:27:22 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 4EDE860F22 for ; Thu, 29 Jul 2021 15:27:22 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S237849AbhG2P1Y (ORCPT ); Thu, 29 Jul 2021 11:27:24 -0400 Received: from smtp-out1.suse.de ([195.135.220.28]:41700 "EHLO smtp-out1.suse.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229934AbhG2P1X (ORCPT ); Thu, 29 Jul 2021 11:27:23 -0400 Received: from imap1.suse-dmz.suse.de (imap1.suse-dmz.suse.de [192.168.254.73]) (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 4475B223F2; Thu, 29 Jul 2021 15:27:19 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=suse.cz; s=susede2_rsa; t=1627572439; h=from:from:reply-to:date:date:message-id:message-id:to:to:cc:cc: mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=Su0HafVKInKv9fAX9yenEdE8BQ0rZJiMRpS8/sYSBpM=; b=2m4o1jAutkkxbCchsC0/ltO7ri+MQNeN+iSk68eVk2gzxMCZsIv7wvePctYX9JCJXWTI0+ mK5wbsntXlQoBxe14uUivf/4DxfHb72y0yenrHybVkmlZUrZzxwAJeyCG1UVicUHOGTXDw oCtcZDRfVEh30WKY9+d3xzQy5qCceRI= DKIM-Signature: v=1; a=ed25519-sha256; c=relaxed/relaxed; d=suse.cz; s=susede2_ed25519; t=1627572439; h=from:from:reply-to:date:date:message-id:message-id:to:to:cc:cc: mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=Su0HafVKInKv9fAX9yenEdE8BQ0rZJiMRpS8/sYSBpM=; b=e4hdKnOoWeLEXkI5lFQ17CM/YDwiDSd4BXl+XgROO0ln/RybY94SV7GFqjg6L3/Z6fYcMY I1MNYr2IqhrwIsBQ== Received: from imap1.suse-dmz.suse.de (imap1.suse-dmz.suse.de [192.168.254.73]) (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 imap1.suse-dmz.suse.de (Postfix) with ESMTPS id 1CAB313738; Thu, 29 Jul 2021 15:27:19 +0000 (UTC) Received: from dovecot-director2.suse.de ([192.168.254.65]) by imap1.suse-dmz.suse.de with ESMTPSA id UUxiBtfIAmE5LgAAGKfGzw (envelope-from ); Thu, 29 Jul 2021 15:27:19 +0000 Subject: Re: [PATCH v3 00/35] SLUB: reduce irq disabled scope and make it RT compatible To: Sebastian Andrzej Siewior Cc: linux-mm@kvack.org, linux-kernel@vger.kernel.org, Christoph Lameter , David Rientjes , Pekka Enberg , Joonsoo Kim , Mike Galbraith , Thomas Gleixner , Mel Gorman , Jesper Dangaard Brouer , Jann Horn References: <20210729132132.19691-1-vbabka@suse.cz> <20210729152400.ed35ocv5jtpf3ns5@linutronix.de> From: Vlastimil Babka Message-ID: <803269ba-d4f4-6016-067f-8f9e02b3c794@suse.cz> Date: Thu, 29 Jul 2021 17:27:18 +0200 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:78.0) Gecko/20100101 Thunderbird/78.12.0 MIME-Version: 1.0 In-Reply-To: <20210729152400.ed35ocv5jtpf3ns5@linutronix.de> Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 7/29/21 5:24 PM, Sebastian Andrzej Siewior wrote: > On 2021-07-29 15:20:57 [+0200], Vlastimil Babka wrote: >> Changes since v2 [5]: > > With PARTIAL enabled on top of -rc3: Is that also PREEMPT_RT? Interesting... > | root@debpg:~# grep ^kmalloc-512 /proc/slabinfo > | kmalloc-512 3552 3552 512 32 4 : tunables 0 0 0 : slabdata 111 111 0 > | root@debpg:~# hackbench -g80 > | Running in process mode with 80 groups using 40 file descriptors each (== 3200 tasks) > | Each sender will pass 100 messages of 100 bytes > | Time: 0.643 > | root@debpg:~# grep ^kmalloc-512 /proc/slabinfo > | kmalloc-512 954080 954080 512 32 4 : tunables 0 0 0 : slabdata 29815 29815 0 > | root@debpg:~# hackbench -g80 > | Running in process mode with 80 groups using 40 file descriptors each (== 3200 tasks) > | Each sender will pass 100 messages of 100 bytes > | Time: 0.604 > | root@debpg:~# grep ^kmalloc-512 /proc/slabinfo > | kmalloc-512 1647904 1647904 512 32 4 : tunables 0 0 0 : slabdata 51497 51497 0 > | root@debpg:~# echo 1 > /sys/kernel/slab/kmalloc-512/shrink > | root@debpg:~# grep ^kmalloc-512 /proc/slabinfo > | kmalloc-512 640 1120 512 32 4 : tunables 0 0 0 : slabdata 35 35 0 > > otherwise a few more hackbench invocations without manual shirnk lead to > OOM-killer: > | oom-kill:constraint=CONSTRAINT_NONE,nodemask=(null),cpuset=/,mems_allowed=0,task=systemd-logind,pid=1713,uid=0 > | Out of memory: Killed process 1713 (systemd-logind) total-vm:15720kB, anon-rss:956kB, file-rss:0kB, shmem-rss:0kB, UID:0 pgtables:72kB oom_score_adj:0 > | Mem-Info: > | active_anon:56 inactive_anon:24782 isolated_anon:0 > | active_file:13 inactive_file:45 isolated_file:0 > | unevictable:0 dirty:0 writeback:0 > | slab_reclaimable:8749 slab_unreclaimable:894017 > | mapped:68 shmem:118 pagetables:28612 bounce:0 > | free:8407 free_pcp:36 free_cma:0 > | Node 0 active_anon:224kB inactive_anon:99128kB active_file:260kB inactive_file:712kB unevictable:0kB isolated(anon):0kB isolated(file):0kB mapped:764kB dirty:0kB writebaco > | Node 0 DMA free:15360kB min:28kB low:40kB high:52kB reserved_highatomic:0KB active_anon:0kB inactive_anon:0kB active_file:0kB inactive_file:0kB unevictable:0kB writependiB > | lowmem_reserve[]: 0 1939 3915 3915 > | Node 0 DMA32 free:11696kB min:3960kB low:5944kB high:7928kB reserved_highatomic:0KB active_anon:0kB inactive_anon:40740kB active_file:0kB inactive_file:4kB unevictable:0kB > | lowmem_reserve[]: 0 0 1975 1975 > | Node 0 Normal free:5692kB min:4032kB low:6052kB high:8072kB reserved_highatomic:0KB active_anon:224kB inactive_anon:58440kB active_file:440kB inactive_file:100kB unevictaB > | lowmem_reserve[]: 0 0 0 0 > | Node 0 DMA: 0*4kB 0*8kB 0*16kB 0*32kB 0*64kB 0*128kB 0*256kB 0*512kB 1*1024kB (U) 1*2048kB (M) 3*4096kB (M) = 15360kB > | Node 0 DMA32: 11*4kB (UM) 15*8kB (M) 20*16kB (UME) 12*32kB (UME) 7*64kB (ME) 5*128kB (UME) 4*256kB (UM) 6*512kB (ME) 4*1024kB (M) 1*2048kB (M) 0*4096kB = 12196kB > | Node 0 Normal: 324*4kB (UME) 221*8kB (UME) 60*16kB (UM) 24*32kB (UME) 5*64kB (UM) 2*128kB (U) 0*256kB 0*512kB 0*1024kB 0*2048kB 0*4096kB = 5368kB > | Node 0 hugepages_total=0 hugepages_free=0 hugepages_surp=0 hugepages_size=2048kB > | 189 total pagecache pages > | 0 pages in swap cache > | Swap cache stats: add 0, delete 0, find 0/0 > | Free swap = 0kB > | Total swap = 0kB > | 1048432 pages RAM > | 0 pages HighMem/MovableOnly > | 41108 pages reserved > | Unreclaimable slab info: > … > | kmalloc-512 2144352KB 2144352KB > > This does not happen if I disable SLUB_CPU_PARTIAL. > > Sebastian >