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=-11.7 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,MENTIONS_GIT_HOSTING, SPF_HELO_NONE,SPF_PASS,UNPARSEABLE_RELAY,USER_AGENT_GIT autolearn=unavailable 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 7266BC433E3 for ; Sat, 11 Jul 2020 00:59:11 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id 3F8C4207BB for ; Sat, 11 Jul 2020 00:59:11 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 3F8C4207BB Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=linux.alibaba.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=owner-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix) id AC0FD8D0003; Fri, 10 Jul 2020 20:59:07 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id 90ECC8D0006; Fri, 10 Jul 2020 20:59:07 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 6C3DE8D0003; Fri, 10 Jul 2020 20:59:07 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0251.hostedemail.com [216.40.44.251]) by kanga.kvack.org (Postfix) with ESMTP id 51D5F8D0005 for ; Fri, 10 Jul 2020 20:59:07 -0400 (EDT) Received: from smtpin21.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay01.hostedemail.com (Postfix) with ESMTP id 1997F180AD801 for ; Sat, 11 Jul 2020 00:59:07 +0000 (UTC) X-FDA: 77023985934.21.grape87_580147c26ed2 Received: from filter.hostedemail.com (10.5.16.251.rfc1918.com [10.5.16.251]) by smtpin21.hostedemail.com (Postfix) with ESMTP id DFFE4180442C0 for ; Sat, 11 Jul 2020 00:59:06 +0000 (UTC) X-HE-Tag: grape87_580147c26ed2 X-Filterd-Recvd-Size: 6837 Received: from out30-42.freemail.mail.aliyun.com (out30-42.freemail.mail.aliyun.com [115.124.30.42]) by imf09.hostedemail.com (Postfix) with ESMTP for ; Sat, 11 Jul 2020 00:59:05 +0000 (UTC) X-Alimail-AntiSpam:AC=PASS;BC=-1|-1;BR=01201311R221e4;CH=green;DM=||false|;DS=||;FP=0|-1|-1|-1|0|-1|-1|-1;HT=e01f04427;MF=alex.shi@linux.alibaba.com;NM=1;PH=DS;RN=17;SR=0;TI=SMTPD_---0U2KGAZr_1594429139; Received: from alexshi-test.localdomain(mailfrom:alex.shi@linux.alibaba.com fp:SMTPD_---0U2KGAZr_1594429139) by smtp.aliyun-inc.com(127.0.0.1); Sat, 11 Jul 2020 08:58:59 +0800 From: Alex Shi To: akpm@linux-foundation.org, mgorman@techsingularity.net, tj@kernel.org, hughd@google.com, khlebnikov@yandex-team.ru, daniel.m.jordan@oracle.com, yang.shi@linux.alibaba.com, willy@infradead.org, hannes@cmpxchg.org, lkp@intel.com, linux-mm@kvack.org, linux-kernel@vger.kernel.org, cgroups@vger.kernel.org, shakeelb@google.com, iamjoonsoo.kim@lge.com, richard.weiyang@gmail.com, kirill@shutemov.name Subject: [PATCH v16 00/22] per memcg lru_lock Date: Sat, 11 Jul 2020 08:58:34 +0800 Message-Id: <1594429136-20002-1-git-send-email-alex.shi@linux.alibaba.com> X-Mailer: git-send-email 1.8.3.1 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 X-Rspamd-Queue-Id: DFFE4180442C0 X-Spamd-Result: default: False [0.00 / 100.00] X-Rspamd-Server: rspam04 Content-Transfer-Encoding: quoted-printable 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: The new version which bases on v5.8-rc4. Add 2 more patchs: 'mm/thp: remove code path which never got into' 'mm/thp: add tail pages into lru anyway in split_huge_page()' and modified 'mm/mlock: reorder isolation sequence during munlock' Current lru_lock is one for each of node, pgdat->lru_lock, that guard for lru lists, but now we had moved the lru lists into memcg for long time. S= till using per node lru_lock is clearly unscalable, pages on each of memcgs ha= ve to compete each others for a whole lru_lock. This patchset try to use per lruvec/memcg lru_lock to repleace per node lru lock to guard lru lists, m= ake it scalable for memcgs and get performance gain. Currently lru_lock still guards both lru list and page's lru bit, that's = ok. but if we want to use specific lruvec lock on the page, we need to pin do= wn the page's lruvec/memcg during locking. Just taking lruvec lock first may= be undermined by the page's memcg charge/migration. To fix this problem, we = could take out the page's lru bit clear and use it as pin down action to block = the memcg changes. That's the reason for new atomic func TestClearPageLRU. So now isolating a page need both actions: TestClearPageLRU and hold the lru_lock. The typical usage of this is isolate_migratepages_block() in compaction.c we have to take lru bit before lru lock, that serialized the page isolati= on in memcg page charge/migration which will change page's lruvec and new=20 lru_lock in it. The above solution suggested by Johannes Weiner, and based on his new mem= cg=20 charge path, then have this patchset. (Hugh Dickins tested and contribute= d much code from compaction fix to general code polish, thanks a lot!). The patchset includes 3 parts: 1, some code cleanup and minimum optimization as a preparation. 2, use TestCleanPageLRU as page isolation's precondition 3, replace per node lru_lock with per memcg per node lru_lock Following Daniel Jordan's suggestion, I have run 208 'dd' with on 104 containers on a 2s * 26cores * HT box with a modefied case: https://git.kernel.org/pub/scm/linux/kernel/git/wfg/vm-scalability.git/tr= ee/case-lru-file-readtwice With this patchset, the readtwice performance increased about 80% in concurrent containers. Thanks Hugh Dickins and Konstantin Khlebnikov, they both brought this idea 8 years ago, and others who give comments as well: Daniel Jordan,=20 Mel Gorman, Shakeel Butt, Matthew Wilcox etc. Thanks for Testing support from Intel 0day and Rong Chen, Fengguang Wu, and Yun Wang. Hugh Dickins also shared his kbuild-swap case. Thanks! Alex Shi (20): mm/vmscan: remove unnecessary lruvec adding mm/page_idle: no unlikely double check for idle page counting mm/compaction: correct the comments of compact_defer_shift mm/compaction: rename compact_deferred as compact_should_defer mm/thp: move lru_add_page_tail func to huge_memory.c mm/thp: clean up lru_add_page_tail mm/thp: remove code path which never got into mm/thp: narrow lru locking mm/memcg: add debug checking in lock_page_memcg mm/swap: fold vm event PGROTATED into pagevec_move_tail_fn mm/lru: move lru_lock holding in func lru_note_cost_page mm/lru: move lock into lru_note_cost mm/lru: introduce TestClearPageLRU mm/thp: add tail pages into lru anyway in split_huge_page() mm/compaction: do page isolation first in compaction mm/mlock: reorder isolation sequence during munlock mm/swap: serialize memcg changes during pagevec_lru_move_fn mm/lru: replace pgdat lru_lock with lruvec lock mm/lru: introduce the relock_page_lruvec function mm/pgdat: remove pgdat lru_lock Hugh Dickins (2): mm/vmscan: use relock for move_pages_to_lru mm/lru: revise the comments of lru_lock Documentation/admin-guide/cgroup-v1/memcg_test.rst | 15 +- Documentation/admin-guide/cgroup-v1/memory.rst | 21 +-- Documentation/trace/events-kmem.rst | 2 +- Documentation/vm/unevictable-lru.rst | 22 +-- include/linux/compaction.h | 4 +- include/linux/memcontrol.h | 98 +++++++++++ include/linux/mm_types.h | 2 +- include/linux/mmzone.h | 6 +- include/linux/page-flags.h | 1 + include/linux/swap.h | 4 +- include/trace/events/compaction.h | 2 +- mm/compaction.c | 113 ++++++++---- mm/filemap.c | 4 +- mm/huge_memory.c | 47 +++-- mm/memcontrol.c | 71 +++++++- mm/memory.c | 3 - mm/mlock.c | 93 +++++----- mm/mmzone.c | 1 + mm/page_alloc.c | 1 - mm/page_idle.c | 8 - mm/rmap.c | 4 +- mm/swap.c | 189 ++++++++-------= ------ mm/swap_state.c | 2 - mm/vmscan.c | 174 ++++++++++-----= ---- mm/workingset.c | 2 - 25 files changed, 524 insertions(+), 365 deletions(-) --=20 1.8.3.1