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b=GoO/qR8P4mfouqOU/vYLtzRNnWFHNol3JvN9wjAKgcll/AWX6dLOtGmrz4tid2rEF 5EIwtIGqfhRxnymTsQnTNNgBbXaufIjKDDCQmnN/e88W2v5KjAfdhIaDNCARK9rK7O 1DxEOviVRHmIlP7J3q1uQ0wWR51kS1lrqbyPZx3PVZ5CEKbnAuun7+dfnlPZbeMDix qahHEyK8vSn9BxrixT11N7nhXuSVwqFezJZGvSfDfjKHkTbz/f65d/HJaQIlOPLb0e OZeUWYmUGJtS/X869qMQpFVayiBaW5/8UMbZVQ9QMrHa56fCAjNaPhT4EcXDlIH/iu WbBbemCDLdU8g== 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: Tue, 29 Sep 2026 00:43:00 -0700 Message-ID: <20260929074300.40012-1-sj@kernel.org> X-Mailer: git-send-email 2.47.3 In-Reply-To: <20260928191332.138511-1-aethernet65535@gmail.com> References: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Rspam-User: X-Rspamd-Server: rspam04 X-Rspamd-Queue-Id: 37E0C160008 X-Stat-Signature: 3xutfnr5wwanhcgorn748ccp43nah4an X-HE-Tag: 1790667786-892277 X-HE-Meta: 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 F/l7jHm2 UNooyfGZjA7ueFXyDn8PGSEidKKZnzOSeCdclht0fr498O8XQ5SZbPxHg1jCjLGVxJjX7Bj72WZa+PWDkpw7VbzfjerijoO+0r04R86+DgP+VsmhMKt26rBYHSdr1izOSF5I1uKq/PcxlW3Ucgjy7GsejyIaOyoCBEaeDn4NI6zCASQMtFOI9nvBtA0are+myPYOq6k1t/WRAvYcy/lwqlpGEFvK0M9FPm4HyjMXA80QrsHyVGq4yTuqOw8vDeiYHGOrz Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: Hi Liew, On Tue, 29 Sep 2026 03:13:06 +0800 Liew Rui Yan wrote: > Hi SJ and Community, > > I've noticed that damo [1] doesn't seem to have a feature for saving > DAMON SYSFS configuration. I tried 'damo args damon', but it doesn't > save the DAMOS schemes information. If so, it is a bug. Could you share more details including how the issue can be reproduced? Directly sending a PR should also be fine. > 'damo report damon --json' provides > more detailed information, but its output cannot be read by 'damo start > --kdamonds'. Maybe this is also an issue that we could fix. > > I'd like to know if there is currently any way in damo to save the DAMON > SYSFS configuration that can be correctly read by 'damo start > --kdamonds'. If not, would it be worth adding one? I believe it would be useful. Please feel free to send a PR. Nonetheless, we added the json/yaml kdamonds config support mainly because there was no good way to flexibly configure kdamonds with the command line interface. Now it is much more improved [1]. I'd recommend using the command line interface. That is, you could copy your command line setup in a bash script and modify/reuse it. Is there a use case that it cannot work or suboptimum? [1] https://github.com/damonitor/damo/issues/3#issuecomment-5655965736 Thanks, SJ [...]