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 C5C3CC3B185 for ; Mon, 17 Feb 2020 10:27:31 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id 7C11220836 for ; Mon, 17 Feb 2020 10:27:31 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=amazon.com header.i=@amazon.com header.b="PcW8jZ7w" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 7C11220836 Authentication-Results: mail.kernel.org; dmarc=fail (p=quarantine dis=none) header.from=amazon.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=owner-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix) id 2B5EB6B0005; Mon, 17 Feb 2020 05:27:31 -0500 (EST) Received: by kanga.kvack.org (Postfix, from userid 40) id 264FB6B000D; Mon, 17 Feb 2020 05:27:31 -0500 (EST) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 1547C6B000E; Mon, 17 Feb 2020 05:27:31 -0500 (EST) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0202.hostedemail.com [216.40.44.202]) by kanga.kvack.org (Postfix) with ESMTP id F21416B0005 for ; Mon, 17 Feb 2020 05:27:30 -0500 (EST) Received: from smtpin08.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay04.hostedemail.com (Postfix) with ESMTP id AF83D2464 for ; Mon, 17 Feb 2020 10:27:30 +0000 (UTC) X-FDA: 76499242260.08.sun50_246d1139bc716 X-HE-Tag: sun50_246d1139bc716 X-Filterd-Recvd-Size: 4311 Received: from smtp-fw-2101.amazon.com (smtp-fw-2101.amazon.com [72.21.196.25]) by imf33.hostedemail.com (Postfix) with ESMTP for ; Mon, 17 Feb 2020 10:27:30 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=amazon.com; i=@amazon.com; q=dns/txt; s=amazon201209; t=1581935251; x=1613471251; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version; bh=noSLYb1CP/9HIx9FUVJwc4ZRGLjE8MhCwuZnuaCR6MU=; b=PcW8jZ7wwV6c3vlBjB3stHTnMKn95169ZeMdqPRAnrB+VC7puQKFfBdU Yi6SGYApSgg/gmVNzt93jQa+0jqUFxprnjqz1lXsfjALWY4ne1duS/ocw el2aKCS9NYOsKE6TCS458ArJXF1vpiudmRiiN2dOfIlL1lvPUsL1YZmuM Y=; IronPort-SDR: sTRa+7B9JfDyukr3WOLLnr9UI7EJR8Bgv7YWdTMMr0A8NzioSXgbBIHCBq6xL5+Jl5Nqg1ViH2 mtnDEN7ORsGQ== X-IronPort-AV: E=Sophos;i="5.70,452,1574121600"; d="scan'208";a="17477633" Received: from iad12-co-svc-p1-lb1-vlan2.amazon.com (HELO email-inbound-relay-2c-2225282c.us-west-2.amazon.com) ([10.43.8.2]) by smtp-border-fw-out-2101.iad2.amazon.com with ESMTP; 17 Feb 2020 10:27:16 +0000 Received: from EX13MTAUEA002.ant.amazon.com (pdx4-ws-svc-p6-lb7-vlan3.pdx.amazon.com [10.170.41.166]) by email-inbound-relay-2c-2225282c.us-west-2.amazon.com (Postfix) with ESMTPS id 8D46DA33CA; Mon, 17 Feb 2020 10:27:13 +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, 17 Feb 2020 10:27:13 +0000 Received: from u886c93fd17d25d.ant.amazon.com (10.43.161.214) by EX13D31EUA001.ant.amazon.com (10.43.165.15) with Microsoft SMTP Server (TLS) id 15.0.1367.3; Mon, 17 Feb 2020 10:27:03 +0000 From: SeongJae Park To: CC: SeongJae Park , , , , , , , , , , , , , , , , , , , , , , , , , Subject: [PATCH v5 05/14] mm/damon: Implement callbacks Date: Mon, 17 Feb 2020 11:25:35 +0100 Message-ID: <20200217102544.29012-6-sjpark@amazon.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20200217102544.29012-1-sjpark@amazon.com> References: <20200217102544.29012-1-sjpark@amazon.com> MIME-Version: 1.0 Content-Type: text/plain X-Originating-IP: [10.43.161.214] X-ClientProxiedBy: EX13D30UWB004.ant.amazon.com (10.43.161.51) To EX13D31EUA001.ant.amazon.com (10.43.165.15) 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: 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 56725faca51f..90f61e378a61 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