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bh=U8ZZtxpPf3ZxApZdnej/5Ho/hbGh7sjDwT8v0/08DJE=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=BrmViO/RMIoAWkNXWo0MAoKRDlCL6fGnNr9qRSMYPKrDZ4XvQTpTbDWEtxuEZGm4q kwj9XAd/xlj1NYq25K+poxGO/DIkNtaE4UekGzAlqh7E8oVaRn2ZYDYXQJJRvTdUB2 1toht33sXHXl4d7XFpj8kmp76YqGcbgQjWAUD+CzIbg8YgSaiyD+5+GC66k+CAMqFZ IXlJx8eWXM2vAyw2Lkf3GAbK5ZfHYed9AnyNZJyehlpsAb2yogHFD+ohUDfftiVfyp WzJmsJPKcxGWyHYlCsD8u0x+nXjOOGKIrfRpxNrb/Do3Igxybr7cfX417UKmh0mzwy rjDM5kPtkAOgg== From: SJ Park To: Liew Rui Yan Cc: SJ Park , damon@lists.linux.dev, linux-mm@kvack.org Subject: Re: [RFC] mm/damon/damo: saving damon sysfs configuration Date: Fri, 9 Oct 2026 07:00:41 -0700 Message-ID: <20261009140041.11741-1-sj@kernel.org> X-Mailer: git-send-email 2.47.3 In-Reply-To: <20261009120950.38879-2-aethernet65535@gmail.com> References: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Stat-Signature: akfkn93j1ifdfyox9ijf97xn1f7ozw69 X-Rspamd-Queue-Id: 21C5880011 X-Rspam-User: X-Rspamd-Server: rspam02 X-HE-Tag: 1791554445-694238 X-HE-Meta: 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 pAR/U4Dv 7dl88TPfNRUOk7PLfVXwm1HmVfxee68NjL4hG1jP61Ip45+VPm4kfmIXn0gEBv6+qyKELVCBW9mVW+HA1CrUS/1yzClb4qalirLJVNy/V9LqZw7Cvei8iaoxr/yJObbPhKLolaXRlMG53X5RRNs5oS+k1aOAeynqmfnJ1mN5+tcqZOTUYhNIJ4XCAcN6l36yEdGcnEerlBIuGFkY/3F04MR9fdHp4DRIXkg3VH1l2/PyrXzM= Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: Hi Liew, On Fri, 9 Oct 2026 20:08:33 +0800 Liew Rui Yan wrote: [...] > Yes. My expected behavior is to completely save and restore the DAMON > SYSFS configuration, including DAMOS Schemes. But it cannot done by > 'damo args damon'. > > In the script I provided, it first apply lru.json and then uses > 'damo args damon' to export the current configuration file. 'damo args damon' does not export the running DAMON parameters. Why do you expect so? Has some document confused you? > I expected > that reapplying this exported configuration (via 'damo start --kdamonds') > would fully restore the previous DAMON SYSFS setup. So this expectation is wrong. > > However, the current/unexpected behavior is that it drops the DAMOS > Schemes configuration entirely. In other words, I cannot fully save > and restore the DAMON SYSFS configuration using 'damo args damon'. So it looks like there is not problem. Please let me know if I'm missing something. Thanks, SJ [...]