From patchwork Mon Jan 23 17:37:29 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Stefan Roesch X-Patchwork-Id: 47304 Return-Path: Delivered-To: ouuuleilei@gmail.com Received: by 2002:adf:eb09:0:0:0:0:0 with SMTP id s9csp1745128wrn; Mon, 23 Jan 2023 10:08:42 -0800 (PST) X-Google-Smtp-Source: AK7set9J1OTjCq8EffYRnDKXgJav3S9k7GjH56DRtcKx+uBhRhWxyIHuI3wht5ZgilzrsLqXT+Yv X-Received: by 2002:a17:902:da81:b0:196:e77:f07b with SMTP id j1-20020a170902da8100b001960e77f07bmr845149plx.39.1674497321820; Mon, 23 Jan 2023 10:08:41 -0800 (PST) ARC-Seal: i=1; a=rsa-sha256; t=1674497321; cv=none; d=google.com; s=arc-20160816; b=kvWvfJpA936AtthxuFFFy60UVQPU+7USczzFxI0Av6R/9jd44IF6UI5ip5ttigEKHd WOvR9Xltu7/ywINqRazKP1r7eytzr+zjVSye/8EAEdxojPNK4QfCb4Vb46H7kENDbv/3 mtLSoXx3Id9/KUIQrxfSUdzZiVtHvlMBIt/IxHnZDEp30WBxYVqiOQrW4/exwIEns78e c1li68hv6QDinSpSjlnCJOjFpIz6N90I3WIxgwtsiQnT3Ew94Me2BrM2G6fYEn+fn/aU ngNqKfWvKokbmk1/ViCL/Xl9pP+4I9Nop4UOwRfLJScHI31VsgSCd5X/oEZb514gnyIk wlPQ== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:content-transfer-encoding:mime-version :references:in-reply-to:message-id:date:subject:cc:to:from; bh=GB7nbTR042OPBT5940sQcmscKilViV2E/45SbY5p8lA=; b=uKzJp1KYNxqWFHc/9td1gAU5PGc99rnG/y64r3rfSED67SyAG3OKbtuO8mzWwFo69d IBRKIE4yblUnZ6uiTXyOrCK1GYem3rgfidJZGQU1UvW+WunxU008u/E2db9Uk6zH5wJV wHaG4qsafmsP/VrQvt3YTNTM0zGDZOoqmwZNZO9o//EeJgLAqJP+jgOmrj02x01eLkbG HYsNO+nPAQ0NldybgFKctENpdLkNgyfkGrp/qIVPwlAlnPVILElfFPX7qXJBBbKNuQ0w /OcI1fC0bYIek9J0pVv4SiWyXCnyf1h6mhYZMt1QCgOF9a6zGkBPIdWjjDrJhA3L1aFu SVyQ== ARC-Authentication-Results: i=1; mx.google.com; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: from out1.vger.email (out1.vger.email. [2620:137:e000::1:20]) by mx.google.com with ESMTP id m21-20020a170902d19500b001898141f0edsi5452plb.159.2023.01.23.10.08.30; Mon, 23 Jan 2023 10:08:41 -0800 (PST) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) client-ip=2620:137:e000::1:20; Authentication-Results: mx.google.com; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233812AbjAWSGg (ORCPT + 99 others); Mon, 23 Jan 2023 13:06:36 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:47382 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233809AbjAWSG3 (ORCPT ); Mon, 23 Jan 2023 13:06:29 -0500 Received: from 66-220-144-178.mail-mxout.facebook.com (66-220-144-178.mail-mxout.facebook.com [66.220.144.178]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id C21E930E94 for ; Mon, 23 Jan 2023 10:06:11 -0800 (PST) Received: by dev0134.prn3.facebook.com (Postfix, from userid 425415) id 41C5F5616BD3; Mon, 23 Jan 2023 09:37:56 -0800 (PST) From: Stefan Roesch To: linux-mm@kvack.org Cc: shr@devkernel.io, linux-doc@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, linux-kselftest@vger.kernel.org, linux-trace-kernel@vger.kernel.org Subject: [RESEND RFC PATCH v1 01/20] mm: add new flag to enable ksm per process Date: Mon, 23 Jan 2023 09:37:29 -0800 Message-Id: <20230123173748.1734238-2-shr@devkernel.io> X-Mailer: git-send-email 2.30.2 In-Reply-To: <20230123173748.1734238-1-shr@devkernel.io> References: <20230123173748.1734238-1-shr@devkernel.io> MIME-Version: 1.0 X-Spam-Status: No, score=2.4 required=5.0 tests=BAYES_00,RDNS_DYNAMIC, SPF_HELO_PASS,SPF_NEUTRAL,SUSPICIOUS_RECIPS,TVD_RCVD_IP autolearn=no autolearn_force=no version=3.4.6 X-Spam-Level: ** X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org X-getmail-retrieved-from-mailbox: =?utf-8?q?INBOX?= X-GMAIL-THRID: =?utf-8?q?1755837703787003886?= X-GMAIL-MSGID: =?utf-8?q?1755837703787003886?= This introduces the new flag MMF_VM_MERGE_ANY flag. When this flag is set, kernel samepage merging (ksm) gets enabled for all vma's of a process. Signed-off-by: Stefan Roesch --- include/linux/sched/coredump.h | 1 + 1 file changed, 1 insertion(+) diff --git a/include/linux/sched/coredump.h b/include/linux/sched/coredump.h index 8270ad7ae14c..0e0de5b7469f 100644 --- a/include/linux/sched/coredump.h +++ b/include/linux/sched/coredump.h @@ -86,4 +86,5 @@ static inline int get_dumpable(struct mm_struct *mm) #define MMF_INIT_MASK (MMF_DUMPABLE_MASK | MMF_DUMP_FILTER_MASK |\ MMF_DISABLE_THP_MASK) +#define MMF_VM_MERGE_ANY 29 #endif /* _LINUX_SCHED_COREDUMP_H */