From nobody Thu Dec 18 20:15:01 2025 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 7F177CD37B6 for ; Sat, 16 Sep 2023 02:10:43 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S238329AbjIPCKX (ORCPT ); Fri, 15 Sep 2023 22:10:23 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:57278 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S235752AbjIPCKB (ORCPT ); Fri, 15 Sep 2023 22:10:01 -0400 Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 867D6173C for ; Fri, 15 Sep 2023 19:09:56 -0700 (PDT) Received: by smtp.kernel.org (Postfix) with ESMTPSA id BC149C433C8; Sat, 16 Sep 2023 02:09:55 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1694830196; bh=VEo1bT4L3oASolFpAiFgoKtkxwTv3u9FxZ+yfBw7tjQ=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=DE5n19QTrLA/q3MCbj6txVWl1uVLgvfvimtQFgvcddmHPnYMGBO3fFDzwOKCAE1Ea 6ZYLcxHkm5CTWFprrqRjF2KtaYm2Pz1lRDiwdDYTuq77AJA0RSUh5o65EYEXrOnEHs xWMKylLYUB2wBv7QR/yROAzDf7cNTsquwx29G72dwKWAZ+EmwIigZOPRJm/YCHaQd8 oGtGCMonOLobfZnVSyKN0ZWlbECSyGnvfq2vefdC/SACWvKlxDcHJ9gAJk10AUBeAe OUhBoRM9HauQyDIauN7P46WxsCKPvr3KFTi/4wXKmwRabKlNI1DRkIECckLti/Mt8P t2+3IdJ/6uTGA== From: SeongJae Park To: Andrew Morton Cc: SeongJae Park , damon@lists.linux.dev, linux-mm@kvack.org, linux-kernel@vger.kernel.org Subject: [PATCH 1/9] mm/damon/core: make DAMOS uses nr_accesses_bp instead of nr_accesses Date: Sat, 16 Sep 2023 02:09:37 +0000 Message-Id: <20230916020945.47296-2-sj@kernel.org> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20230916020945.47296-1-sj@kernel.org> References: <20230916020945.47296-1-sj@kernel.org> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Type: text/plain; charset="utf-8" DAMON provides nr_accesses_bp, which becomes same to nr_accesses * 10000 for every aggregation interval, but updated every sampling interval with a reasonable accuracy. Since DAMON-based operation schemes are applied in every aggregation interval using nr_accesses, using nr_accesses_bp instead will make no difference to users. Meanwhile, it allows DAMOS to apply the schemes in a time interval that less than the aggregation interval. It could be useful and more flexible for some cases. Do it. Signed-off-by: SeongJae Park --- mm/damon/core.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) diff --git a/mm/damon/core.c b/mm/damon/core.c index b15cf47d2d29..79fef5145a4b 100644 --- a/mm/damon/core.c +++ b/mm/damon/core.c @@ -770,12 +770,13 @@ static void damon_split_region_at(struct damon_target= *t, static bool __damos_valid_target(struct damon_region *r, struct damos *s) { unsigned long sz; + unsigned int nr_accesses =3D r->nr_accesses_bp / 10000; =20 sz =3D damon_sz_region(r); return s->pattern.min_sz_region <=3D sz && sz <=3D s->pattern.max_sz_region && - s->pattern.min_nr_accesses <=3D r->nr_accesses && - r->nr_accesses <=3D s->pattern.max_nr_accesses && + s->pattern.min_nr_accesses <=3D nr_accesses && + nr_accesses <=3D s->pattern.max_nr_accesses && s->pattern.min_age_region <=3D r->age && r->age <=3D s->pattern.max_age_region; } --=20 2.25.1