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 Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id C593EC79FB7 for ; Thu, 10 Sep 2026 00:18:04 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id 9BB576B008A; Wed, 9 Sep 2026 20:18:03 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id 96C826B008C; Wed, 9 Sep 2026 20:18:03 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 85B2D6B0092; Wed, 9 Sep 2026 20:18:03 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from relay.hostedemail.com (smtprelay0011.hostedemail.com [216.40.44.11]) by kanga.kvack.org (Postfix) with ESMTP id 5FEB76B008A for ; Wed, 9 Sep 2026 20:18:03 -0400 (EDT) Received: from smtpin12.hostedemail.com (lb01a-stub [10.200.18.249]) by unirelay05.hostedemail.com (Postfix) with ESMTP id 951AA40393 for ; Thu, 10 Sep 2026 00:17:57 +0000 (UTC) X-FDA: 85195939794.12.7DC8845 Received: from tor.source.kernel.org (tor.source.kernel.org [172.105.4.254]) by imf04.hostedemail.com (Postfix) with ESMTP id 13F9540004 for ; Thu, 10 Sep 2026 00:17:55 +0000 (UTC) Authentication-Results: imf04.hostedemail.com; dkim=pass header.d=kernel.org header.s=k20260515 header.b=XDiIuga1; spf=pass (imf04.hostedemail.com: domain of sj@kernel.org designates 172.105.4.254 as permitted sender) smtp.mailfrom=sj@kernel.org; dmarc=pass (policy=quarantine) header.from=kernel.org ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=hostedemail.com; s=arc-20220608; t=1788999476; h=from:from:sender:reply-to:subject:subject:date:date: message-id:message-id:to:to:cc:cc:mime-version:mime-version: content-type:content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references:dkim-signature; bh=TW3K+AgSrwHemRWw14UWea9xECIj/k6NgLwb2UHRsPk=; b=Or5dqeg99244YqeK556p64g8TkDsJ5zXNkOlP7QouobQwHqQCP4nJpBc7YAfyXBQgRAfpe 6lRqFqrFtMA5BFsXI80nDyXQ7Iz5zzkuOHvTGLbZxudpEbQQy4gwkBCm3jhJFG/Z+EZHPd wcPjYx6t5/EjQy4SptOtzWUa23hJVzU= ARC-Authentication-Results: i=1; imf04.hostedemail.com; dkim=pass header.d=kernel.org header.s=k20260515 header.b=XDiIuga1; spf=pass (imf04.hostedemail.com: domain of sj@kernel.org designates 172.105.4.254 as permitted sender) smtp.mailfrom=sj@kernel.org; dmarc=pass (policy=quarantine) header.from=kernel.org ARC-Seal: i=1; a=rsa-sha256; d=hostedemail.com; s=arc-20220608; cv=none; t=1788999476; b=gsKOiuMtoo+2AvzvGMXK9FSqf0/V8uEpLQ3JAHsr4oz4dkFQ+noTImvnx9BMzX43orCMu7 mrg+3vwGjSE2kiH4MhYKy2kgoI3RgUVX3pkdqmlwIvK1zkmTkncDlbEzZc5bjN4xSX72Tv xDnfbU6396tNRuCTTir5JNe6gmOq9uQ= Received: from smtp.kernel.org (quasi.space.kernel.org [100.103.45.18]) by tor.source.kernel.org (Postfix) with ESMTP id 5A94C600CB; Thu, 10 Sep 2026 00:17:55 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 769F51F000FF; Thu, 10 Sep 2026 00:17:54 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1788999475; bh=TW3K+AgSrwHemRWw14UWea9xECIj/k6NgLwb2UHRsPk=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=XDiIuga1MVxrtxfrwhhYXePZoy0JGb+ujz65mh5hUYMY67pz0foKfM7Q5QkCL5v0n lTfa0cCfiS2XfZuigBiP9U0iHcwdRhd2CUM46aewqoVtleZ9nOpf9n/TnU19pVtIA2 utUeA+R2k3MqADcMDel8YPg5y/UPtErXdi911fksXcgktppyMIvkEkrLuLBIFVW721 RSfj6A+rv2AiJzx7SRLLoqkfDUlSg9Kd+1ykynRnzDYAXahm39nr1ayxpyrCVgbZJU SbdiADH8ni8BbnbdwSnfXengJkE6FhFqUH+qO/l72YS2CRY795lUa5AGNDljhhF/f6 gzdzh8H/kx7Jg== From: SJ Park To: Liew Rui Yan Cc: SJ Park , akpm@linux-foundation.org, corbet@lwn.net, damon@lists.linux.dev, david@kernel.org, liam@infradead.org, linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org, ljs@kernel.org, mhocko@suse.com, rdunlap@infradead.org, rppt@kernel.org, skhan@linuxfoundation.org, surenb@google.com, vbabka@kernel.org Subject: Re: [RFC PATCH] Docs/mm/damon/design: clarify when qt_exceeds increases Date: Wed, 9 Sep 2026 17:17:46 -0700 Message-ID: <20260910001747.110260-1-sj@kernel.org> X-Mailer: git-send-email 2.47.3 In-Reply-To: <20260909100913.30568-1-aethernet65535@gmail.com> References: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Rspamd-Server: rspam02 X-Rspamd-Queue-Id: 13F9540004 X-Stat-Signature: 713tf3eogpdfsztca8jm6963nwhjsr39 X-Rspam-User: X-HE-Tag: 1788999475-392597 X-HE-Meta: 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 ZnwTz7po UGqL26eGxQEsryd3sEtvOkV0DA/RFKN7yKu4A7XyG3edqCXBXde13o+A2E/pnv2BVRcoVOG+i48ZLFyvlU3pGlJDbeKaij83wRuyAt6V505EcngR+47lM4G4ps9+bLs6c9uKN9BbWmBeG5xw2wtQI70De2DNxw4U9WLNf8lN7ETedAo2OM7RcETSbcnDyE1gjMkAhH5Z7aBuCgGW4u7hrN/ao0El1eWzi2Eba8TvJ/kPmeF4bykEjtB5WQiaiOu2fpQeHJPT+wEfa/LCs69/BdnmOPm9rEfo0C47nFyfW9ScifygiaX36eJHM+g== Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: On Wed, 9 Sep 2026 18:07:33 +0800 Liew Rui Yan wrote: > On Tue, 08 Sep 2026 17:38:00 -0700 SJ Park wrote: > > > Hi Liew, > > > > On Wed, 9 Sep 2026 01:50:23 +0800 Liew Rui Yan wrote: [...] > > > By the way, I found a thing in the design document that confused me. > > > > > > temporal: More straightforward algorithm. Tries to achieve the goal > > > as fast as possible, using maximum allowed quota, but only for a > > > temporal short time. ---> When the quota is under-achieved, this > > > algorithm keeps tuning quota to a maximum allowed one. Once the > > > quota is [over]-achieved <---, this sets the quota zero. Useful for > > > deterministic control required environments. > > > > > > I'm not sure if "goal" was accidentally written as "quota" here. Would > > > this be better? > > > > > > When the goal is under-achieved, this algorithm keeps tuning quota > > > to a maximum allowed one. Once the goal is [over-]achieved, [...] > > > > Good eyes! Yes, seems it was only mistakenly written in the way. Please feel > > free to send a separate patch or include it into the next version of this > > patch, whatever better for you. > > I will send a separate patch. Makes sense to me. [...] > > I think the clarification is better to be added to the 'temporal' quota tuner, > > since this happens only when it is used. Maybe the clarification could also be > > shorter. For example, [...] > I agree that would be better. Although users might look up the > definition of qt_exceeds first, they are also likely to navigate > directly to the temporal section. > > I will clarify at the temporal section in the next revision. Thank you. Looking forward to patches. Thanks, SJ [...]