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b=i8zgU9H00aZpT70CsDofrzplGxWbwzHQdXgqfYP/hYddK7+05sSjsy0/uQ0qOdUg+ 5x1hS1NIVbpNkhc5xBd51SDJvB/RKA929EuUuQGWIGGJ05/eQnYVfj9t2CVepYEjcD aQ7MJCUS3a+CcfII222AgXhl217yNDg8HuSvMKLtKO2R+/mhBCjAhEuOXc9rLCBJ6n hgp8ORGqLeIzMhWW0PYzETP9HXWpv8trvWguWjiUAf7JrPt8FTbLRlB+g+4CNBgrzu jD6ISZ0S+tvoSenMT612tncv13lr2dtbWSM+CAKKSTfULK8Birn+BdUyA/+d5DgyXa eYjEEB5M4gFnA== 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 v3] mm/damon/core: allow esz to be set to zero Date: Sat, 5 Sep 2026 09:18:27 -0700 Message-ID: <20260905161828.82068-1-sj@kernel.org> X-Mailer: git-send-email 2.47.3 In-Reply-To: <20260905124706.3398-1-aethernet65535@gmail.com> References: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Rspam-User: X-Rspamd-Server: rspam01 X-Rspamd-Queue-Id: 6FD5E40003 X-Stat-Signature: gxanhoanumfntdmgxx4b6e6xhb88chgf X-HE-Tag: 1788625117-584350 X-HE-Meta: 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 lgUAUIWO 5jVW/F1Lqk6hMqyCFzWTjO8wtw52lsLukA+mgUwupy7tUox0kg8UejxomPD1x2JxbKJnN5Jy41wIw9SG+oO3xrPmHQGhsUk3qyKmK3Xk30nmDUQWcCPWdkGAGDpEk6f5xc6XIIMRMc0AjEgaEgPxZKBRklIdmjfP9lHapkSceYQvsFAHEwzSVkOb82bmCeT0dbz0iLCEwqw1TqqwolvAo7w89dgX7kUjIkfpnQ188XuDtg0F8vHFcuko+7n1j4j2sQY1t5yrmWlvsU1+TV5F7DS68gA== Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: Hello Liew, On Sat, 5 Sep 2026 20:44:58 +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 esz > becomes zero. However, damos_set_effective_quota() clamps the esz to > min_region_sz when quota->ms is set. > > This is a minor issue, the main problem is that it doesn't match the > description in the documentation, which state that if the goal has > already been [over-]achieved, the quota will be set to zero. > > Fix this by set quota (esz) as minimum as possible. Thank you for finding and fixing this. > > Fixes: 8bbde987c2b8 ("mm/damon/core: disallow time-quota setting zero esz") > Cc: # v7.1.x > Signed-off-by: Liew Rui Yan Reviewed-by: SJ Park This patch is applied to damon/next [1] tree. If this patch is not added to mm.git in short term (~1 week?), I will ask mm.git maintainer (Andrew Morton) to pick this. So, no action from your side is needed for now. If it seems I also forgot doing that or you cannot wait for my action, please feel free to directly ask that to Andrew. [1] https://origin.kernel.org/doc/html/latest/mm/damon/maintainer-profile.html#scm-trees Thanks, SJ [...]