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=-9.9 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH, MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=ham 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 5E115C10DCE for ; Wed, 18 Mar 2020 11:32:55 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 31CBD20771 for ; Wed, 18 Mar 2020 11:32:55 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=amazon.com header.i=@amazon.com header.b="SlpBCYgO" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726989AbgCRLcy (ORCPT ); Wed, 18 Mar 2020 07:32:54 -0400 Received: from smtp-fw-33001.amazon.com ([207.171.190.10]:42483 "EHLO smtp-fw-33001.amazon.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726855AbgCRLcy (ORCPT ); Wed, 18 Mar 2020 07:32:54 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=amazon.com; i=@amazon.com; q=dns/txt; s=amazon201209; t=1584531174; x=1616067174; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version; bh=IIweUbJ6ywSxmEcEsqVWoNZ/WqTFK20tUG13PKDxXU8=; b=SlpBCYgOcuiVX8O+xraTgbBjl8ei7tsivi8p6D047Zp5yP6uYJyYGGPx +IhlVEtIcd3bDXVmtvrH5iwOFpZll7+Mf7eKHa+nSqgnlkn8jgaa9fxpZ myAY+duIJzAr09FGNQFJCmrcQAKfKgmhhLBYzAm8rURdn+A4BM2ID59r9 E=; IronPort-SDR: ETsYFwWCXdqiKtV6jfvVJ1un7t8wySL4whgPWQh+9JbcrMmEtsPTXOPvBfEhrozL4akLUT1+Cz xz06oDSJsiKw== X-IronPort-AV: E=Sophos;i="5.70,567,1574121600"; d="scan'208";a="33271215" Received: from sea32-co-svc-lb4-vlan3.sea.corp.amazon.com (HELO email-inbound-relay-1e-27fb8269.us-east-1.amazon.com) ([10.47.23.38]) by smtp-border-fw-out-33001.sea14.amazon.com with ESMTP; 18 Mar 2020 11:32:51 +0000 Received: from EX13MTAUEA002.ant.amazon.com (iad55-ws-svc-p15-lb9-vlan3.iad.amazon.com [10.40.159.166]) by email-inbound-relay-1e-27fb8269.us-east-1.amazon.com (Postfix) with ESMTPS id 428FFA0333; Wed, 18 Mar 2020 11:32:40 +0000 (UTC) Received: from EX13D31EUA001.ant.amazon.com (10.43.165.15) by EX13MTAUEA002.ant.amazon.com (10.43.61.77) with Microsoft SMTP Server (TLS) id 15.0.1236.3; Wed, 18 Mar 2020 11:32:40 +0000 Received: from u886c93fd17d25d.ant.amazon.com (10.43.161.235) by EX13D31EUA001.ant.amazon.com (10.43.165.15) with Microsoft SMTP Server (TLS) id 15.0.1497.2; Wed, 18 Mar 2020 11:32:26 +0000 From: SeongJae Park To: CC: SeongJae Park , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , Subject: [PATCH v7 07/15] mm/damon: Implement callbacks Date: Wed, 18 Mar 2020 12:27:14 +0100 Message-ID: <20200318112722.30143-8-sjpark@amazon.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20200318112722.30143-1-sjpark@amazon.com> References: <20200318112722.30143-1-sjpark@amazon.com> MIME-Version: 1.0 Content-Type: text/plain X-Originating-IP: [10.43.161.235] X-ClientProxiedBy: EX13D28UWC001.ant.amazon.com (10.43.162.166) To EX13D31EUA001.ant.amazon.com (10.43.165.15) Sender: linux-doc-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-doc@vger.kernel.org From: SeongJae Park This commit implements callbacks for DAMON. Using this, DAMON users can install their callbacks for each step of the access monitoring so that they can do something interesting with the monitored access patterns online. For example, callbacks can report the monitored patterns to users or do some access pattern based memory management such as proactive reclamations or access pattern based THP promotions/demotions decision makings. Signed-off-by: SeongJae Park --- include/linux/damon.h | 4 ++++ mm/damon.c | 4 ++++ 2 files changed, 8 insertions(+) diff --git a/include/linux/damon.h b/include/linux/damon.h index 64e327400749..cad3ee3d78db 100644 --- a/include/linux/damon.h +++ b/include/linux/damon.h @@ -56,6 +56,10 @@ struct damon_ctx { struct rnd_state rndseed; struct list_head tasks_list; /* 'damon_task' objects */ + + /* callbacks */ + void (*sample_cb)(struct damon_ctx *context); + void (*aggregate_cb)(struct damon_ctx *context); }; int damon_set_pids(struct damon_ctx *ctx, unsigned long *pids, ssize_t nr_pids); diff --git a/mm/damon.c b/mm/damon.c index 535337529d20..2e8af1ce4389 100644 --- a/mm/damon.c +++ b/mm/damon.c @@ -787,9 +787,13 @@ static int kdamond_fn(void *data) } mmput(mm); } + if (ctx->sample_cb) + ctx->sample_cb(ctx); if (kdamond_aggregate_interval_passed(ctx)) { kdamond_merge_regions(ctx, max_nr_accesses / 10); + if (ctx->aggregate_cb) + ctx->aggregate_cb(ctx); kdamond_reset_aggregated(ctx); kdamond_split_regions(ctx); } -- 2.17.1