From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-alma10-1.taild15c8.ts.net [100.103.45.18]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 7F75F2DF3DA for ; Sun, 28 Jun 2026 17:05:00 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=100.103.45.18 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1782666302; cv=none; b=jA+6vrcZL4B0+Xa7Y64T/IBtV6C5zJhMoOJHhwluBLmV9vIqZZ7ZTryZYwNDMPodPPyl5QbuWquqqarn5vmGe3Eu0rwi08fbOxTduBYIgEvwhYJZcxW1FC2nfGWq89S0eOZ/7qPmIww/S8G4EqOgDOL5ozZBkcXAw1cMXsehFH8= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1782666302; c=relaxed/simple; bh=7edhWxlAT7p3uGUAXujBkPV7O8n2yQgUDtRVQ62nP4w=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=IQl9fb78hEzMqfEtnOmZ7+nGymJo9RcUAV0utMnONae5rY9yYmi7YQmGD7UXtn5a6Oy6M8llzt0qk15gRat+BpWLqfYXZ3w1SJOOamBTR3Ln62EiqrRs/AOCauZDY+ympAYn0hCBVY+G2imoDWu0CXBTvqEpcBXfdfjm7aSLF5w= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=aBVRzBQl; arc=none smtp.client-ip=100.103.45.18 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="aBVRzBQl" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 985881F000E9; Sun, 28 Jun 2026 17:04:59 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1782666299; bh=/ymacN+/8XLk9vgGgQDu7elYRViiHjsgkD4GV6NQOeo=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=aBVRzBQlIrFuu2OUTsWUbIox+hZloXoDBTy2pGUmntedummE3L9kqa8ZfGuBBGr7Q uYshUqMV/yFoM8+/atUm/RI/XgPlJQi2ba/siXveguUzhb5eUD1GhwSehIrTMQ/lOB cvwjL5Ie+qOqKMYW4toDZ9Cua/RE+4A2QnlpX47+VMJgBhCpH3bzrfARSKFfNr/P82 YpH9wkVYtOFcOcnidfqvV7tq6hKjr8i6oGARSx3dyoJIihFOx4FJTENEu5sMDdEnxL xrKnJWXOiCw3EdgO0u/3eoxXnSZNaPIiXM+PNmcjpyDwJMxvXUcVnriiFdfGJf5NoZ Hj38E/WLv3Q5A== From: SJ Park To: Liew Rui Yan Cc: SJ Park , damon@lists.linux.dev, linux-mm@kvack.org Subject: Re: [RFC PATCH] mm/damon/reclaim: add 'available' memory as an optional watermarks metric Date: Sun, 28 Jun 2026 10:04:45 -0700 Message-ID: <20260628170447.88064-1-sj@kernel.org> X-Mailer: git-send-email 2.47.3 In-Reply-To: <20260628085547.21814-1-aethernet65535@gmail.com> References: Precedence: bulk X-Mailing-List: damon@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit On Sun, 28 Jun 2026 16:55:38 +0800 Liew Rui Yan wrote: > On Sat, 27 Jun 2026 15:26:43 -0700 SJ Park wrote: > > > > I will drop this patch. I think controlling DAMOS pause/rusume > > > separately might be better suited for execution in user space (such as > > > controlling‘quota_ms’ and ‘quota_sz’). > > > > For explicit DAMOS-only pause/resume, you may also be interested in > > max_nr_snapshots [1] feature. > > Thank you for the pointer to the 'max_nr_snapshots' feature! Feel free to let me know if you have any question for the feature. > > > > > > > By the way, I sent you an email about three weeks ago (Fri, 5 Jun 2026 > > > 20:28:00 +0800) introducing a userspace auto-tuner program I wrote for > > > DAMON_RECLAIM's 'min_age', and asking for your thoughts. I am not sure > > > if it reached you, could you please check? I would really appreciate > > > your feedback on that as well. > > > > I don't recall that mail. Did you send that to damon@lists.linux.dev or other > > public mailing lists? If so, could you share the message id or lore.kernel.org > > link of the mail? If not, could you please resend? > > I hadn't previously sent this to damon@lists.linux.dev or any public > mailing list. > > Since I have completely rewritten it (the email) and it focuses on a > standalone userspace program/daemon, I have submitted it as a new > independent RFC thread [1] to avoid biasing this patch's topic. Makes perfect sense. I will review. > > > [1] https://lkml.kernel.org/r/20251216080128.42991-8-sj@kernel.org > > [1] https://lore.kernel.org/damon/20260628085155.20828-1-aethernet65535@gmail.com Thanks, SJ [...]