From patchwork Thu May 19 18:31:22 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Chih-En Lin X-Patchwork-Id: 12855909 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 kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by smtp.lore.kernel.org (Postfix) with ESMTP id 7A112C433EF for ; Thu, 19 May 2022 18:30:14 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id F2AB66B0072; Thu, 19 May 2022 14:30:13 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id EDA116B0073; Thu, 19 May 2022 14:30:13 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id D54596B0075; Thu, 19 May 2022 14:30:13 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from relay.hostedemail.com (smtprelay0012.hostedemail.com [216.40.44.12]) by kanga.kvack.org (Postfix) with ESMTP id C7C396B0072 for ; Thu, 19 May 2022 14:30:13 -0400 (EDT) Received: from smtpin16.hostedemail.com (a10.router.float.18 [10.200.18.1]) by unirelay08.hostedemail.com (Postfix) with ESMTP id A495A20BA2 for ; Thu, 19 May 2022 18:30:13 +0000 (UTC) X-FDA: 79483332306.16.1BC6A82 Received: from mail-pg1-f171.google.com (mail-pg1-f171.google.com [209.85.215.171]) by imf17.hostedemail.com (Postfix) with ESMTP id C1C46400E1 for ; Thu, 19 May 2022 18:29:46 +0000 (UTC) Received: by mail-pg1-f171.google.com with SMTP id a9so3769119pgv.12 for ; Thu, 19 May 2022 11:30:11 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=MBcruspzlRSUkj1U/ztmfktnidm/dp1cZWRRvf7+pnI=; b=QsQqdtLwZc0eErpW+lp8P5RtGtErHFCKbEYB+utK3i4Dk+nEWoNs0zGNOCrdNS5tks W+VXbeWrAeOf9ogl8Actgzl2iaul9VDKLfM8opBiXTVR5cZZBB4tT2T5txkr49i8clTY XbC0KH7+Cj64LFCjy5BkGSMaJGyAbraOwWrttPhJdaL2QIzYxAQqJKaqqV9cx/V1qzKf gtr26jaZz/hWK/Pk6eT1jyIq/xvT/oDREMpFQNt/C8B8eIkzH1drfql4ckWNvyvdhSOi N+kPGeboi8SFwHrsKQX40KifLiRqH62bvq7ejKCf7HltCBOWTKAvJkMwJPrlPUgneNKE aK3g== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=MBcruspzlRSUkj1U/ztmfktnidm/dp1cZWRRvf7+pnI=; b=NN1WOBOcOF8hUNDspDDZ6SxRbURPapFU4tT61Drt5jYa2zQiO/3tbSdyjI2yiXnpBa WjS1bySSEuGxu7l5QQEmBDq118iieWPFIQHNO/4IChJj8Ke4N3a2+WPyjoBAYuV7BSLp 6DaRaBoAXNufHc++YpL80RDEcMk2CwpbCL6QQcvxj+ZS14YM3UJMrwhKeDRTmVTj8oft K+YA8dWrgsTh/5bWZdZ2DTm1QnSQMFo/mcnZxnNO332zk/JZ3oyPjce2qHCU9iQJRnfD oRr19suGUz0x2JiuKCWjhz0l/DwPshdUsbmtC7NwBK9KCttdlV42ulNzn3dh5uRltR4/ f5zw== X-Gm-Message-State: AOAM531RLetlLkR7wgDmKVQcjh0W1irdrWjbp4xMgCrYnhgTvhUW7rzQ g+nqvetem1CT31USJTYj0u0= X-Google-Smtp-Source: ABdhPJwjZtwEwrpyhy+etq/VjPlWGxVwe2qV4NvoJ4SLLfXvXkWATt7s2S7siucglap/0xqXp1MQUw== X-Received: by 2002:a63:6705:0:b0:3c1:976d:bd68 with SMTP id b5-20020a636705000000b003c1976dbd68mr5049666pgc.133.1652985011160; Thu, 19 May 2022 11:30:11 -0700 (PDT) Received: from archlinux.localdomain ([140.121.198.213]) by smtp.googlemail.com with ESMTPSA id z5-20020a63e105000000b003c14af505f6sm3884674pgh.14.2022.05.19.11.30.05 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 19 May 2022 11:30:10 -0700 (PDT) From: Chih-En Lin To: Andrew Morton , linux-mm@kvack.org Cc: Ingo Molnar , Peter Zijlstra , Juri Lelli , Vincent Guittot , Dietmar Eggemann , Steven Rostedt , Ben Segall , Mel Gorman , Daniel Bristot de Oliveira , Christian Brauner , "Matthew Wilcox (Oracle)" , Vlastimil Babka , William Kucharski , John Hubbard , Yunsheng Lin , Arnd Bergmann , Suren Baghdasaryan , Chih-En Lin , Colin Cross , Feng Tang , "Eric W. Biederman" , Mike Rapoport , Geert Uytterhoeven , Anshuman Khandual , "Aneesh Kumar K.V" , Daniel Axtens , Jonathan Marek , Christophe Leroy , Pasha Tatashin , Peter Xu , Andrea Arcangeli , Thomas Gleixner , Andy Lutomirski , Sebastian Andrzej Siewior , Fenghua Yu , David Hildenbrand , linux-kernel@vger.kernel.org, Kaiyang Zhao , Huichun Feng , Jim Huang Subject: [RFC PATCH 1/6] mm: Add a new mm flag for Copy-On-Write PTE table Date: Fri, 20 May 2022 02:31:22 +0800 Message-Id: <20220519183127.3909598-2-shiyn.lin@gmail.com> X-Mailer: git-send-email 2.36.1 In-Reply-To: <20220519183127.3909598-1-shiyn.lin@gmail.com> References: <20220519183127.3909598-1-shiyn.lin@gmail.com> MIME-Version: 1.0 X-Rspamd-Server: rspam10 X-Rspamd-Queue-Id: C1C46400E1 Authentication-Results: imf17.hostedemail.com; dkim=pass header.d=gmail.com header.s=20210112 header.b=QsQqdtLw; spf=pass (imf17.hostedemail.com: domain of shiyn.lin@gmail.com designates 209.85.215.171 as permitted sender) smtp.mailfrom=shiyn.lin@gmail.com; dmarc=pass (policy=none) header.from=gmail.com X-Rspam-User: X-Stat-Signature: azdn8ne393k9gnbmupa1qshfchc7ozwm X-HE-Tag: 1652984986-767018 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: Add MMF_COW_PGTABLE flag to prepare the subsequent implementation of copy-on-write for the page table. Signed-off-by: Chih-En Lin --- include/linux/sched/coredump.h | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/include/linux/sched/coredump.h b/include/linux/sched/coredump.h index 4d9e3a656875..19e9f2b71398 100644 --- a/include/linux/sched/coredump.h +++ b/include/linux/sched/coredump.h @@ -83,7 +83,10 @@ static inline int get_dumpable(struct mm_struct *mm) #define MMF_HAS_PINNED 28 /* FOLL_PIN has run, never cleared */ #define MMF_DISABLE_THP_MASK (1 << MMF_DISABLE_THP) +#define MMF_COW_PGTABLE 29 +#define MMF_COW_PGTABLE_MASK (1 << MMF_COW_PGTABLE) + #define MMF_INIT_MASK (MMF_DUMPABLE_MASK | MMF_DUMP_FILTER_MASK |\ - MMF_DISABLE_THP_MASK) + MMF_DISABLE_THP_MASK | MMF_COW_PGTABLE_MASK) #endif /* _LINUX_SCHED_COREDUMP_H */