From patchwork Thu Jan 16 03:05:08 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Alex Shi X-Patchwork-Id: 11335921 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 606AA139A for ; Thu, 16 Jan 2020 03:05:28 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id 36EE7214AF for ; Thu, 16 Jan 2020 03:05:28 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 36EE7214AF 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 7AD848E001C; Wed, 15 Jan 2020 22:05:21 -0500 (EST) Delivered-To: linux-mm-outgoing@kvack.org Received: by kanga.kvack.org (Postfix, from userid 40) id 70A618E0025; Wed, 15 Jan 2020 22:05:21 -0500 (EST) X-Original-To: int-list-linux-mm@kvack.org X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 3CECC8E0024; Wed, 15 Jan 2020 22:05:21 -0500 (EST) X-Original-To: linux-mm@kvack.org X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0186.hostedemail.com [216.40.44.186]) by kanga.kvack.org (Postfix) with ESMTP id 074958E0022 for ; Wed, 15 Jan 2020 22:05:21 -0500 (EST) Received: from smtpin23.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay02.hostedemail.com (Postfix) with SMTP id C27614995F9 for ; Thu, 16 Jan 2020 03:05:20 +0000 (UTC) X-FDA: 76382006400.23.fifth00_85dbc4c2b5f11 X-Spam-Summary: 2,0,0,4c747f11d2a1b796,d41d8cd98f00b204,alex.shi@linux.alibaba.com,:cgroups@vger.kernel.org:linux-kernel@vger.kernel.org::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:shakeelb@google.com:hannes@cmpxchg.org:mhocko@kernel.org:vdavydov.dev@gmail.com,RULES_HIT:41:355:379:541:800:960:973:988:989:1260:1261:1345:1359:1431:1437:1534:1543:1711:1730:1747:1777:1792:2393:2559:2562:2901:3138:3139:3140:3141:3142:3354:3866:4321:4605:5007:6114:6119:6261:6642:6737:7514:7903:9040:10004:11026:11473:11658:11914:12043:12048:12296:12297:12438:12555:12895:12986:13846:14096:14181:14394:14721:14915:21060:21080:21451:21627:21966:21990:30054:30070,0,RBL:115.124.30.54:@linux.alibaba.com:.lbl8.mailshell.net-62.20.2.100 64.201.201.201,CacheIP:none,Bayesian:0.5,0.5,0.5,Netcheck:none,DomainCache:0,MSF:not bulk,SPF:fp,MSBL:0,DNSBL:none,Custom_rules:0:0:0, LFtime:2 X-HE-Tag: fifth00_85dbc4c2b5f11 X-Filterd-Recvd-Size: 4715 Received: from out30-54.freemail.mail.aliyun.com (out30-54.freemail.mail.aliyun.com [115.124.30.54]) by imf24.hostedemail.com (Postfix) with ESMTP for ; Thu, 16 Jan 2020 03:05:19 +0000 (UTC) X-Alimail-AntiSpam: AC=PASS;BC=-1|-1;BR=01201311R891e4;CH=green;DM=||false|;DS=||;FP=0|-1|-1|-1|0|-1|-1|-1;HT=e01f04397;MF=alex.shi@linux.alibaba.com;NM=1;PH=DS;RN=15;SR=0;TI=SMTPD_---0TnrL8m-_1579143915; Received: from localhost(mailfrom:alex.shi@linux.alibaba.com fp:SMTPD_---0TnrL8m-_1579143915) by smtp.aliyun-inc.com(127.0.0.1); Thu, 16 Jan 2020 11:05:15 +0800 From: Alex Shi To: cgroups@vger.kernel.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org, 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, shakeelb@google.com, hannes@cmpxchg.org Cc: Michal Hocko , Vladimir Davydov Subject: [PATCH v8 09/10] mm/lru: add debug checking for page memcg moving Date: Thu, 16 Jan 2020 11:05:08 +0800 Message-Id: <1579143909-156105-10-git-send-email-alex.shi@linux.alibaba.com> X-Mailer: git-send-email 1.8.3.1 In-Reply-To: <1579143909-156105-1-git-send-email-alex.shi@linux.alibaba.com> References: <1579143909-156105-1-git-send-email-alex.shi@linux.alibaba.com> 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 debug patch could give some clues if there are sth out of consideration. Hugh Dickins report a bug of this patch, Thanks! Signed-off-by: Alex Shi Cc: Johannes Weiner Cc: Hugh Dickins Cc: Michal Hocko Cc: Vladimir Davydov Cc: Andrew Morton Cc: cgroups@vger.kernel.org Cc: linux-mm@kvack.org Cc: linux-kernel@vger.kernel.org --- include/linux/memcontrol.h | 5 +++++ mm/compaction.c | 2 ++ mm/memcontrol.c | 15 +++++++++++++++ 3 files changed, 22 insertions(+) diff --git a/include/linux/memcontrol.h b/include/linux/memcontrol.h index 09e861df48e8..ece88bb11d0f 100644 --- a/include/linux/memcontrol.h +++ b/include/linux/memcontrol.h @@ -421,6 +421,7 @@ static inline struct lruvec *mem_cgroup_lruvec(struct mem_cgroup *memcg, struct lruvec *lock_page_lruvec_irqsave(struct page *, unsigned long*); void unlock_page_lruvec_irq(struct lruvec *); void unlock_page_lruvec_irqrestore(struct lruvec *, unsigned long); +void lruvec_memcg_debug(struct lruvec *lruvec, struct page *page); struct mem_cgroup *mem_cgroup_from_task(struct task_struct *p); @@ -1183,6 +1184,10 @@ static inline void count_memcg_page_event(struct page *page, void count_memcg_event_mm(struct mm_struct *mm, enum vm_event_item idx) { } + +static inline void lruvec_memcg_debug(struct lruvec *lruvec, struct page *page) +{ +} #endif /* CONFIG_MEMCG */ /* idx can be of type enum memcg_stat_item or node_stat_item */ diff --git a/mm/compaction.c b/mm/compaction.c index 8c0a2da217d8..151242817bf4 100644 --- a/mm/compaction.c +++ b/mm/compaction.c @@ -971,6 +971,8 @@ static bool too_many_isolated(pg_data_t *pgdat) compact_lock_irqsave(&lruvec->lru_lock, &flags, cc); locked_lruvec = lruvec; + lruvec_memcg_debug(lruvec, page); + /* Try get exclusive access under lock */ if (!skip_updated) { skip_updated = true; diff --git a/mm/memcontrol.c b/mm/memcontrol.c index 00fef8ddbd08..a567fd868739 100644 --- a/mm/memcontrol.c +++ b/mm/memcontrol.c @@ -1238,6 +1238,19 @@ struct lruvec *mem_cgroup_page_lruvec(struct page *page, struct pglist_data *pgd return lruvec; } +void lruvec_memcg_debug(struct lruvec *lruvec, struct page *page) +{ +#ifdef CONFIG_DEBUG_VM + if (mem_cgroup_disabled()) + return; + + if (!page->mem_cgroup) + VM_BUG_ON_PAGE(lruvec_memcg(lruvec) != root_mem_cgroup, page); + else + VM_BUG_ON_PAGE(lruvec_memcg(lruvec) != page->mem_cgroup, page); +#endif +} + struct lruvec *lock_page_lruvec_irq(struct page *page) { struct lruvec *lruvec; @@ -1247,6 +1260,7 @@ struct lruvec *lock_page_lruvec_irq(struct page *page) lruvec = mem_cgroup_lruvec(memcg, page_pgdat(page)); spin_lock_irq(&lruvec->lru_lock); + lruvec_memcg_debug(lruvec, page); return lruvec; } @@ -1259,6 +1273,7 @@ struct lruvec *lock_page_lruvec_irqsave(struct page *page, unsigned long *flags) lruvec = mem_cgroup_lruvec(memcg, page_pgdat(page)); spin_lock_irqsave(&lruvec->lru_lock, *flags); + lruvec_memcg_debug(lruvec, page); return lruvec; }