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 65DCBC624D7 for ; Wed, 2 Sep 2026 14:14:00 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id 68DDB6B0095; Wed, 2 Sep 2026 10:13:59 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id 6172D6B0099; Wed, 2 Sep 2026 10:13:59 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 52D366B009B; Wed, 2 Sep 2026 10:13:59 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from relay.hostedemail.com (smtprelay0016.hostedemail.com [216.40.44.16]) by kanga.kvack.org (Postfix) with ESMTP id 354C06B0095 for ; Wed, 2 Sep 2026 10:13:59 -0400 (EDT) Received: from smtpin11.hostedemail.com (lb01a-stub [10.200.18.249]) by unirelay06.hostedemail.com (Postfix) with ESMTP id C55ACA3C78 for ; Wed, 2 Sep 2026 14:13:58 +0000 (UTC) X-FDA: 85169016156.11.E5F75CA Received: from sea.source.kernel.org (sea.source.kernel.org [172.234.252.31]) by imf26.hostedemail.com (Postfix) with ESMTP id 2F68D140014 for ; Wed, 2 Sep 2026 14:13:57 +0000 (UTC) Authentication-Results: imf26.hostedemail.com; dkim=pass header.d=kernel.org header.s=k20260515 header.b=GveyguU3; spf=pass (imf26.hostedemail.com: domain of sj@kernel.org designates 172.234.252.31 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=1788358437; b=hkso0EM924b+YrIcaesF96o4lP3Ypvj6cZs9w5nwfMfgK/LiYUc2A9nPp7Y2OUHnKH64h6 0Auj+uCYQWApUAy0MnDA7tJvtJWs8FtDe6ttsFsowvO/dlDpVRPxD9qEwGDYIYp4lhFM+Z ozQsUux1UCkJ1fd9B8Bca7AjAmItQKQ= ARC-Authentication-Results: i=1; imf26.hostedemail.com; dkim=pass header.d=kernel.org header.s=k20260515 header.b=GveyguU3; spf=pass (imf26.hostedemail.com: domain of sj@kernel.org designates 172.234.252.31 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=1788358437; 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=/sY7iQ8sPr77cH4aM3sTeT7wFW0GP7eesI1PHSHpEgk=; b=J/mM0gPjuC/AsSjouHFv8C3fW9IbhGLQTZOb7H1Vk+voCWPC+euOILywwk/AueGAonl2vq 8D13WhHEaR4bn9zrOGnPYJNVl/CLK4zL2lTDpCpWgVRRbOtYZSOjnRipFpPwP68kAo5jl3 rlCwLlmwrF+kpgNh3ysFUfSPRomVrAc= Received: from smtp.kernel.org (quasi.space.kernel.org [100.103.45.18]) by sea.source.kernel.org (Postfix) with ESMTP id 4A07C40F17; Wed, 2 Sep 2026 14:13:56 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id ED03D1F000E9; Wed, 2 Sep 2026 14:13:55 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1788358436; bh=/sY7iQ8sPr77cH4aM3sTeT7wFW0GP7eesI1PHSHpEgk=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=GveyguU3ESZbjw9mrZcN+gKwl14Um+a67M0pjqmHBKAfGaH12EGa4poXgUz15a+p1 Ld7ko03aZH/1UwEetlHA9wPUj0aSl3BskI3AxGgwQ4F3DMwyk0Mu18hBOKbl9TEgjU 9x0Tvi1mCuX21yj+oMftISrmfQvSiX+z76odon0feaIvVjCWDGqXpNc9fMu/stc8P/ 2xcqbgTyuwSNIMrfwXDiysh6D4DLIxBWrB8gBjzgAiQ+l2Vn8EQ0JZRWYrbKTXBxxo CchbzB+bjMYLw0vBRqw0XkRn4Cnxofeovu0V0XMl2CzXWaVQwyHK6sR5vFrMIN/IMD Y96xjI3CeWSLA== From: SJ Park To: Liew Rui Yan Cc: SJ Park , Andrew Morton , damon@lists.linux.dev, linux-mm@kvack.org, linux-kernel@vger.kernel.org, stable@vger.kernel.org Subject: Re: [PATCH v2] mm/damon/core: allow esz to be set to zero Date: Wed, 2 Sep 2026 07:13:48 -0700 Message-ID: <20260902141349.86896-1-sj@kernel.org> X-Mailer: git-send-email 2.47.3 In-Reply-To: <20260902082050.19566-1-aethernet65535@gmail.com> References: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Rspam-User: X-Rspamd-Server: rspam10 X-Rspamd-Queue-Id: 2F68D140014 X-Stat-Signature: uwmqmqijud6dfdkcwpo1gbiaecy4nt9w X-HE-Tag: 1788358437-711554 X-HE-Meta: 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 psi1cAhL WsgzEZiZ23fHYQt2vs/7De3kkVwz5JOLGq/s/4/83qTchRDEtZE/xUrkAIJSKZt0pDc+w7W+DpA+yINzCS4AiWN38ZUkAgyuUnrO1E/Nv2yJnxoxs7iARPx+tmLWv9tgnAqKZntkOgDst0AnAzeSEtEskrCpclgo/+ofBiHKE2LYxq3bUAmpwOV3O5Uq7UCSmEwHTorLmF0cDc7Xa14D4bXmFs9P5lgQ2Fm3Xch0mJAAs0Es= Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: On Wed, 2 Sep 2026 16:20:50 +0800 Liew Rui Yan wrote: > When the temporal quota goal tuner determines that the goal has been > achieved (score >= 10000), it sets esz_bp to zero so that the effective > quota (esz) becomes zero. However, damos_set_effective_quota() clamps > the quota to min_region_sz, preventing the quota from ever reaching > zero. Where in the code it is clamped to min_region_sz, when? And what user issue this can cause? Thanks, SJ [...]