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=unavailable 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 AD5DCC11D2F for ; Mon, 24 Feb 2020 12:33:27 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 85BE52072D for ; Mon, 24 Feb 2020 12:33:27 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=amazon.com header.i=@amazon.com header.b="ECA0thfc" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727646AbgBXMd0 (ORCPT ); Mon, 24 Feb 2020 07:33:26 -0500 Received: from smtp-fw-9101.amazon.com ([207.171.184.25]:61969 "EHLO smtp-fw-9101.amazon.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726778AbgBXMd0 (ORCPT ); Mon, 24 Feb 2020 07:33:26 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=amazon.com; i=@amazon.com; q=dns/txt; s=amazon201209; t=1582547606; x=1614083606; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version; bh=weeHoQhUDaIKmcIzoigoC/Hxvz+bNtYyztdsYxajgwU=; b=ECA0thfc9tDveJzJWygM3fWRvzd2LO8g/QfLzb+2DKXhyoHWgLGLAbwK LiO3J7QwbjwsgXwkeM1tm4bn5f9FHZdGYLQdvdxnUjCcu6Frv5ZwyDL84 tAKBLxRZYRw4giqCqHTAI5H96x1aCCpAWY9rdWJqVs55/Yg5jvXZwAt9M g=; IronPort-SDR: T83MG9QY90gwDAPmSw8L1Ibtd/ND31zWoNbmr1OGrbuZR+nxtWs9ceJNFeWTgGWNLJVwjwGxug 7ywEIbVUf5xA== X-IronPort-AV: E=Sophos;i="5.70,480,1574121600"; d="scan'208";a="18696393" Received: from sea32-co-svc-lb4-vlan3.sea.corp.amazon.com (HELO email-inbound-relay-2a-22cc717f.us-west-2.amazon.com) ([10.47.23.38]) by smtp-border-fw-out-9101.sea19.amazon.com with ESMTP; 24 Feb 2020 12:33:25 +0000 Received: from EX13MTAUEA002.ant.amazon.com (pdx4-ws-svc-p6-lb7-vlan3.pdx.amazon.com [10.170.41.166]) by email-inbound-relay-2a-22cc717f.us-west-2.amazon.com (Postfix) with ESMTPS id 68FE6A23F3; Mon, 24 Feb 2020 12:33:23 +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; Mon, 24 Feb 2020 12:33:23 +0000 Received: from u886c93fd17d25d.ant.amazon.com (10.43.162.53) by EX13D31EUA001.ant.amazon.com (10.43.165.15) with Microsoft SMTP Server (TLS) id 15.0.1367.3; Mon, 24 Feb 2020 12:33:11 +0000 From: SeongJae Park To: CC: SeongJae Park , , , , , , , , , , , , , , , , , , , , , , , , , , , , , Subject: [PATCH v6 05/14] mm/damon: Implement callbacks Date: Mon, 24 Feb 2020 13:30:38 +0100 Message-ID: <20200224123047.32506-6-sjpark@amazon.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20200224123047.32506-1-sjpark@amazon.com> References: <20200224123047.32506-1-sjpark@amazon.com> MIME-Version: 1.0 Content-Type: text/plain X-Originating-IP: [10.43.162.53] X-ClientProxiedBy: EX13D19UWC003.ant.amazon.com (10.43.162.184) To EX13D31EUA001.ant.amazon.com (10.43.165.15) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@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 pattrns 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 --- mm/damon.c | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/mm/damon.c b/mm/damon.c index 6a17408e83c2..554720778e8a 100644 --- a/mm/damon.c +++ b/mm/damon.c @@ -83,6 +83,10 @@ 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); }; /* Get a random number in [l, r) */ @@ -814,9 +818,13 @@ 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_flush_aggregated(ctx); kdamond_split_regions(ctx); } -- 2.17.1