From patchwork Mon Jan 23 17:37:39 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Stefan Roesch X-Patchwork-Id: 47295 Return-Path: Delivered-To: ouuuleilei@gmail.com Received: by 2002:adf:eb09:0:0:0:0:0 with SMTP id s9csp1744085wrn; Mon, 23 Jan 2023 10:06:47 -0800 (PST) X-Google-Smtp-Source: AMrXdXu1JH4vriWajXHElJV+2OhlIVtc0Zhww/PmSEkolbcMCbP6BC1yC8kIZpcpt0CjK/n1fbRy X-Received: by 2002:aa7:dcd0:0:b0:49e:c9f4:1e5b with SMTP id w16-20020aa7dcd0000000b0049ec9f41e5bmr12870517edu.7.1674497207033; Mon, 23 Jan 2023 10:06:47 -0800 (PST) ARC-Seal: i=1; a=rsa-sha256; t=1674497207; cv=none; d=google.com; s=arc-20160816; b=qqJpFYeglbBTxfqju7PoywhIX70YzoOJmBzTL4wVfnuzEOkX8gbJMkJPjTRwRYw9Qw VltOFARtlD7xiyiuHYh7spZNj3IdhfAVh+1CSjF3Xj9NaGArZP1cxJPgc+y6HlnLM6++ HwBZilcSLU3MRXpKYm5iThGAaMmRt2v/MrxB1DKIqArI+0E8mHQDwjn9AFCPYYAFxcWu uE8rJgNe0B6YfIi8eZJEPGNYWq03FTekEMx1qJ1FnkeZKlzsIK0JQ78vpFhZMTMZDFEk HBoJ0Og57TM8c/OYi7JqXFWOxhlpyQFgQW4NlzLo7FZg7IGbrmrSuNHCYY3UgxGPRd83 ogmA== 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=FWkDwqnduO/ODHyQgdE5Zu/r/6qm0MdGBf1NS8vrglw=; b=yQCKH8YRdhj4QCkPFUyeoy1SohogBj/Ep9KaPOjvP/KZl0mzE5j03xnleesRrG4gRt y8KDYKsne6Vu1c67CBRXB4fHVXvD+SxzhCj2o2AmzdrsxjkGqw2xQXGpwe2/vXq57GcZ xABqqEU/VKdSFjT9mXEsz7wyCxqChcUT5/ScWXJC55aNJ6peKI5b7NEchNWOxCyudzDl DYBldo0MiWapJpJq383yAmkJc77ydMlPhlwBotCyY3k5hUI5I3P7onHWp3RA6BU/ZUNQ EdOd3uFW0LyMMTHGNN3gpKnzIOl/UCk0BooMI+JA322ZMPdTyMl/1dW0Ki3pYf2SKprV EHwA== 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 j20-20020a05640211d400b0047db5ff4936si33641616edw.490.2023.01.23.10.06.16; Mon, 23 Jan 2023 10:06:47 -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 S233512AbjAWSDt (ORCPT + 99 others); Mon, 23 Jan 2023 13:03:49 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:43102 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233499AbjAWSDp (ORCPT ); Mon, 23 Jan 2023 13:03:45 -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 B381B2D162 for ; Mon, 23 Jan 2023 10:03:43 -0800 (PST) Received: by dev0134.prn3.facebook.com (Postfix, from userid 425415) id 6B83A5616BE7; 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 11/20] mm: calculate ksm process profit metric Date: Mon, 23 Jan 2023 09:37:39 -0800 Message-Id: <20230123173748.1734238-12-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?1755837583231481097?= X-GMAIL-MSGID: =?utf-8?q?1755837583231481097?= The ksm documentation mentions the process profit metric and how to calculate it. This adds the calculation of the metric. Signed-off-by: Stefan Roesch --- include/linux/ksm.h | 4 ++++ mm/ksm.c | 8 ++++++++ 2 files changed, 12 insertions(+) diff --git a/include/linux/ksm.h b/include/linux/ksm.h index d38a05a36298..a18cd03efcfb 100644 --- a/include/linux/ksm.h +++ b/include/linux/ksm.h @@ -55,6 +55,10 @@ struct page *ksm_might_need_to_copy(struct page *page, void rmap_walk_ksm(struct folio *folio, struct rmap_walk_control *rwc); void folio_migrate_ksm(struct folio *newfolio, struct folio *folio); +#ifdef CONFIG_PROC_FS +long ksm_process_profit(struct mm_struct *); +#endif /* CONFIG_PROC_FS */ + #else /* !CONFIG_KSM */ static inline int ksm_fork(struct mm_struct *mm, struct mm_struct *oldmm) diff --git a/mm/ksm.c b/mm/ksm.c index d29454a802a0..288689b59527 100644 --- a/mm/ksm.c +++ b/mm/ksm.c @@ -2935,6 +2935,14 @@ static void wait_while_offlining(void) } #endif /* CONFIG_MEMORY_HOTREMOVE */ +#ifdef CONFIG_PROC_FS +long ksm_process_profit(struct mm_struct *mm) +{ + return (long)mm->ksm_merging_pages * PAGE_SIZE - + mm->ksm_rmap_items * sizeof(struct ksm_rmap_item); +} +#endif /* CONFIG_PROC_FS */ + #ifdef CONFIG_SYSFS /* * This all compiles without CONFIG_SYSFS, but is a waste of space.