From mboxrd@z Thu Jan 1 00:00:00 1970 Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.remote-ip=100.103.45.18 ARC-Seal: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; cv=none; t=1794640540; b=F1sLnOBhfbNtCSp5l7IfDwXcfgzxNZ/s7wbhrTSguKjS+SKqlCU71HHhrTWVMO/U6hpu gf4cepSkwq7eJKQ5Ksds8FSSSHuXEDGNl1NDEwGem7nnrRBOTO3hjVi6bYw29nh5gPLUy laVwyHqNddOZb9rsqeIdmaLot2H/OgSPv8iK6T13JyFAOVugSFu/Fxcn/ttMFkVSWwUHG 0h5KQD1mUyQTnA+Ix6EOLuOhVevdxJBYG4mB9NqWEyRcsIwXXAQJRysn1QauyGWMIBBNh qY/i/GpE6RL/nhFBi2XmbRASUfXFIK2d0Zevon2R7MfhyuvKXBrBF616F7NZS4PotzQ== ARC-Message-Signature: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; c=relaxed/relaxed; t=1794640540; h=Received:DKIM-Signature:Message-ID:From:Subject:Reply-To:To:Cc: In-Reply-To:References:Content-Type:Content-Transfer-Encoding:Date; bh=zfr/7TUsQGHRg75UWbP+oAoDTK7BYVL25AVHLBl8PVM=; b=q5L3Oe8nVPvslpNrfefIRyN/LK/DaO37bM4Rv6zsAiqDiQQwvJAQZDEAufcJTVLJ1lC8 eClSoIMf/0uTDSINHSWlwezG3Rz01VtuNlSrg65cqzWlRd0shO1fDO9nXOfgUqs2KJckD nzfJJCyhMkFK5vlO5gDZUJMT7II4g3q6mTWqsXqDiB4xibtbZGlcy5NMB/5qIa/RGZ+27 jKvQWm2NqOVe4YnH8hlndb5bmmw3QGyFf2fx56afAy7fXvhgnwYrBrdBX3oRopB+b0bIf t+k4TpVglKs9J1OKnbxcEiIudkd2yRsQCx5YH2o6cqoNwX1pVHz74jU/U3ggSRzo4Jw== ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass header.d=kernel.org header.i=@kernel.org header.a=rsa-sha256 header.s=k20260515 header.b=JOOcGkKY; arc=none smtp.remote-ip=100.103.45.18 Received: from smtp.kernel.org (quasi.space.kernel.org [100.103.45.18]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (prime256v1)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id F36A7606A329; Sat, 14 Nov 2026 07:15:39 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.a=rsa-sha256 header.s=k20260515 header.b=JOOcGkKY Received: by smtp.kernel.org (Postfix) with ESMTPSA id 609C21F000C4; Sat, 14 Nov 2026 07:15:39 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1794640539; bh=zfr/7TUsQGHRg75UWbP+oAoDTK7BYVL25AVHLBl8PVM=; h=From:Subject:Reply-To:To:Cc:In-Reply-To:References:Date; b=JOOcGkKYIcseXNvmwLdijlmNwJ9spEyPHULev35iXCqKjG6iJyDJjKJAffnrwvdhe fx4wUlSpMOLDgE0CrrASbnxkH6dtWlIVHpSMKzsepSG5npGq8kgK8k+wN+ZtCDypo9 C3UgYg4kenHEAi/fcQ9HMkJzJjw3v+VSZkNelCTxPbgYFcla1LEuit/eXNSzyUQpC0 5RgRTSlDR8859RrIyZaLuihgDG+oP/K2sz9jGcNqc+VAK4RLD8Z5GMYAS7wKsnLxb4 efON4Ur0lohnjv0tPx78ZV2UeZ2FETOyxcRiKIY85BVpt9qGQNQHWRAxY0vhKeE81+ oF0Eb1IDevABA== Message-ID: From: sashiko-bot@kernel.org Subject: Re: [PATCH 12/22] mm/damon: restrict DAMON-native folio operations to common memory Reply-To: sashiko-reviews@lists.linux.dev To: =?utf-8?b?R3JlZ29yeSBQcmljZSAoTWV0YSk=?= Cc: linux-serial@vger.kernel.org, damon@lists.linux.dev In-Reply-To: <20261114070959.3490008-13-gourry@gourry.net> References: <20261114070959.3490008-1-gourry@gourry.net> <20261114070959.3490008-13-gourry@gourry.net> Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable Date: Sat, 14 Nov 2026 07:15:38 +0000 X-Mailing-List: linux-serial@vger.kernel.org List-Id: List-Post: List-Help: List-Subscribe: List-Unsubscribe: List-Owner: Precedence: list > DAMON acquires folios to age them, check their accesses, and apply LRU > operations and migration. Treat these as general-purpose MM services > and restrict them to N_MEMORY_COMMON. >=20 > Memory outside N_MEMORY_COMMON can still hold ordinary LRU folios, so > it would pass the checks that keep ZONE_DEVICE memory out of these > operations. >=20 > Treat these folios like ZONE_DEVICE memory. >=20 > DAMON cannot acquire such a folio, so it never ages one and virtual > address monitoring reports it as accessed, and DAMOS cannot isolate > one for migration. >=20 > Reject migration destinations outside N_MEMORY_COMMON. >=20 > All memory is common at this point, so behavior is unchanged. >=20 > Signed-off-by: Gregory Price (Meta) Sashiko has reviewed this patch and found no issues. --=20 Sashiko AI review =C2=B7 https://sashiko.dev/#/patchset/20261114070959.3490= 008-1-gourry@gourry.net?part=3D12