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=-3.9 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT 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 F40EBC5518C for ; Wed, 22 Apr 2020 20:47:26 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id A600C214AF for ; Wed, 22 Apr 2020 20:47:26 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=fb.com header.i=@fb.com header.b="Hs0BTxGL" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org A600C214AF Authentication-Results: mail.kernel.org; dmarc=fail (p=quarantine dis=none) header.from=fb.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=owner-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix) id 746B88E0007; Wed, 22 Apr 2020 16:47:22 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id 71C5B8E0005; Wed, 22 Apr 2020 16:47:22 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 65B2F8E0007; Wed, 22 Apr 2020 16:47:22 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0081.hostedemail.com [216.40.44.81]) by kanga.kvack.org (Postfix) with ESMTP id 468938E0005 for ; Wed, 22 Apr 2020 16:47:22 -0400 (EDT) Received: from smtpin19.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay05.hostedemail.com (Postfix) with ESMTP id F1912181AEF09 for ; Wed, 22 Apr 2020 20:47:21 +0000 (UTC) X-FDA: 76736676282.19.wash83_403eb8efe744a X-HE-Tag: wash83_403eb8efe744a X-Filterd-Recvd-Size: 8316 Received: from mx0a-00082601.pphosted.com (mx0a-00082601.pphosted.com [67.231.145.42]) by imf06.hostedemail.com (Postfix) with ESMTP for ; Wed, 22 Apr 2020 20:47:21 +0000 (UTC) Received: from pps.filterd (m0148461.ppops.net [127.0.0.1]) by mx0a-00082601.pphosted.com (8.16.0.42/8.16.0.42) with SMTP id 03MKhRK9028348 for ; Wed, 22 Apr 2020 13:47:20 -0700 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=fb.com; h=from : to : cc : subject : date : message-id : mime-version : content-transfer-encoding : content-type; s=facebook; bh=bYXySgtA0glsWw22mN546qhTFN/cHgQM7XvI05NPNl0=; b=Hs0BTxGLRAmGPqW4n8qUX47lQDmBBx2ISyhzRACb6/YWvcHgXsNzOQOPlMkO2HnfbR0l Okx/IYcub3tHBHaVp9Hp1KTprjqr9Bxc/GkGENFl0dNsz9e0pMl4IqeO6qSzELDZPNOb CWrvQSVpKyAQ+CH2F+b8p1LPSIuoyPT7trY= Received: from mail.thefacebook.com ([163.114.132.120]) by mx0a-00082601.pphosted.com with ESMTP id 30ghfebmvp-6 (version=TLSv1.2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128 verify=NOT) for ; Wed, 22 Apr 2020 13:47:20 -0700 Received: from intmgw002.41.prn1.facebook.com (2620:10d:c085:108::8) by mail.thefacebook.com (2620:10d:c085:21d::4) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.1847.3; Wed, 22 Apr 2020 13:47:19 -0700 Received: by devvm4439.prn2.facebook.com (Postfix, from userid 111017) id BB5BB229357F7; Wed, 22 Apr 2020 13:47:16 -0700 (PDT) Smtp-Origin-Hostprefix: devvm From: Roman Gushchin Smtp-Origin-Hostname: devvm4439.prn2.facebook.com To: Andrew Morton CC: Johannes Weiner , Michal Hocko , , , , Roman Gushchin Smtp-Origin-Cluster: prn2c23 Subject: [PATCH v3 00/19] The new cgroup slab memory controller Date: Wed, 22 Apr 2020 13:46:49 -0700 Message-ID: <20200422204708.2176080-1-guro@fb.com> X-Mailer: git-send-email 2.24.1 MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-FB-Internal: Safe Content-Type: text/plain X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:6.0.138,18.0.676 definitions=2020-04-22_07:2020-04-22,2020-04-22 signatures=0 X-Proofpoint-Spam-Details: rule=fb_default_notspam policy=fb_default score=0 bulkscore=0 priorityscore=1501 mlxlogscore=999 lowpriorityscore=0 phishscore=0 mlxscore=0 adultscore=0 clxscore=1015 malwarescore=0 spamscore=0 suspectscore=0 impostorscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2003020000 definitions=main-2004220158 X-FB-Internal: deliver 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: This is a third version of the slab cgroup controller rework. The patchset moves the accounting from the page level to the object level. It allows to share slab pages between memory cgroups. This leads to a significant win in the slab utilization (up to 45%) and the corresponding drop in the total kernel memory footprint. The reduced number of unmovable slab pages should also have a positive effect on the memory fragmentation. The patchset makes the slab accounting code simpler: there is no more need in the complicated dynamic creation and destruction of per-cgroup slab caches, all memory cgroups use a global set of shared slab caches. The lifetime of slab caches is not more connected to the lifetime of memory cgroups. The more precise accounting does require more CPU, however in practice the difference seems to be negligible. We've been using the new slab controller in Facebook production for several months with different workloads and haven't seen any noticeable regressions. What we've seen were memory savings in order of 1 GB per host (it varied heavily dependin= g on the actual workload, size of RAM, number of CPUs, memory pressure, etc= ). The third version of the patchset added yet another step towards the simplification of the code: sharing of slab caches between accounted and non-accounted allocations. It comes with significant upsides (most noticeable, a complete elimination of dynamic slab caches creation) but not without some regression risks, so this change sits on top of the patchset and is not completely merged in. So in the unlikel= y event of a noticeable performance regression it can be reverted separatel= y. v3: 1) added a patch that switches to a global single set of kmem_caches 2) kmem API clean up dropped, because if has been already merged 3) byte-sized slab vmstat API over page-sized global counters and bytes-sized memcg/lruvec counters 3) obj_cgroup refcounting simplifications and other minor fixes 4) other minor changes v2: 1) implemented re-layering and renaming suggested by Johannes, added his patch to the set. Thanks! 2) fixed the issue discovered by Bharata B Rao. Thanks! 3) added kmem API clean up part 4) added slab/memcg follow-up clean up part 5) fixed a couple of issues discovered by internal testing on FB fleet. 6) added kselftests 7) included metadata into the charge calculation 8) refreshed commit logs, regrouped patches, rebased onto mm tree, etc v1: 1) fixed a bug in zoneinfo_show_print() 2) added some comments to the subpage charging API, a minor fix 3) separated memory.kmem.slabinfo deprecation into a separate patch, provided a drgn-based replacement 4) rebased on top of the current mm tree RFC: https://lwn.net/Articles/798605/ Johannes Weiner (1): mm: memcontrol: decouple reference counting from page accounting Roman Gushchin (18): mm: memcg: factor out memcg- and lruvec-level changes out of __mod_lruvec_state() mm: memcg: prepare for byte-sized vmstat items mm: memcg: convert vmstat slab counters to bytes mm: slub: implement SLUB version of obj_to_index() mm: memcg/slab: obj_cgroup API mm: memcg/slab: allocate obj_cgroups for non-root slab pages mm: memcg/slab: save obj_cgroup for non-root slab objects mm: memcg/slab: charge individual slab objects instead of pages mm: memcg/slab: deprecate memory.kmem.slabinfo mm: memcg/slab: move memcg_kmem_bypass() to memcontrol.h mm: memcg/slab: use a single set of kmem_caches for all accounted allocations mm: memcg/slab: simplify memcg cache creation mm: memcg/slab: deprecate memcg_kmem_get_cache() mm: memcg/slab: deprecate slab_root_caches mm: memcg/slab: remove redundant check in memcg_accumulate_slabinfo() mm: memcg/slab: use a single set of kmem_caches for all allocations kselftests: cgroup: add kernel memory accounting tests tools/cgroup: add memcg_slabinfo.py tool drivers/base/node.c | 6 +- fs/proc/meminfo.c | 4 +- include/linux/memcontrol.h | 80 ++- include/linux/mm_types.h | 5 +- include/linux/mmzone.h | 19 +- include/linux/slab.h | 5 - include/linux/slab_def.h | 8 +- include/linux/slub_def.h | 20 +- include/linux/vmstat.h | 16 +- kernel/power/snapshot.c | 2 +- mm/memcontrol.c | 569 ++++++++++-------- mm/oom_kill.c | 2 +- mm/page_alloc.c | 8 +- mm/slab.c | 39 +- mm/slab.h | 365 +++++------- mm/slab_common.c | 643 +-------------------- mm/slob.c | 12 +- mm/slub.c | 183 +----- mm/vmscan.c | 3 +- mm/vmstat.c | 33 +- mm/workingset.c | 6 +- tools/cgroup/memcg_slabinfo.py | 226 ++++++++ tools/testing/selftests/cgroup/.gitignore | 1 + tools/testing/selftests/cgroup/Makefile | 2 + tools/testing/selftests/cgroup/test_kmem.c | 382 ++++++++++++ 25 files changed, 1322 insertions(+), 1317 deletions(-) create mode 100755 tools/cgroup/memcg_slabinfo.py create mode 100644 tools/testing/selftests/cgroup/test_kmem.c --=20 2.25.3