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=1794483198; b=eeOtO4xhjeOuhB/2dXu8oXA0H+qz7hGgb532QLhJOcB0sQqDOmDNomj9eCp6hCPiAyT+ 8x2GMBXhoJ08ZCfLMAItUSwebCMNvq4MhqzSBhOU8p2UVuTVhybyq7IpH6Pvpl/9iP4dQ s608gHJvJUw4WuT2QMIR/nV0nkZEHVM/9KE51hdi7imL0cBjbqoULUi3AFBGxKeOKY2r8 n8R0BiJd7On86iI3WRqTvBHf2LYwVHG0R9w2QlsFFHuGxRI6/h2PHZ6bcdnGkREtwPyQO afmR4kDQ9CL8+x5jJJ0MZmBcBK05VMyr0kCF/KH6SH/2vw/CtL9t+6n7vPtjrsB8LmA== ARC-Message-Signature: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; c=relaxed/relaxed; t=1794483198; h=Received:DKIM-Signature:Message-ID:From:Subject:Reply-To:To:Cc: In-Reply-To:References:Content-Type:Content-Transfer-Encoding:Date; bh=fkFNkK9waQrr04LqwebhOzpt6VfUKvnie5m0HgQWrUo=; b=L7BLIEDWirbQrMHDbKooMX00K/e3Ljbjm1MWsw//pKQZRcHS5OAHM/Pk17FpWryyyXiz yt7h9fMugW8XTCTnuk35ilS070LC9ebnKO5bct25CyKWJzLq+euogL+fgXkMYvPftGEBB ydWxa27bQurgGumLeseyaY932ulAOKcM3mwxbr0W7hnYl9rEtI7sqqqJ+UKI0za9+3o5z QbFYudSjLP9kUlc3gD5aQ0i8hH0BNDU5Yhpk+9PcyzvrfGewOY8znTAFP2zoQL4YndseC wl/kUwViTNkZf3FcFq1/QW3r1OgZcVB8W/eE0EGvTViEhjvYta7KPmFmdiPS05OgGFw== 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=onDgyYuJ; 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 00719606A323 for ; Thu, 12 Nov 2026 11:33:18 +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=onDgyYuJ Received: by smtp.kernel.org (Postfix) with ESMTPSA id 2D8511F00A05; Thu, 12 Nov 2026 11:33:17 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1794483197; bh=fkFNkK9waQrr04LqwebhOzpt6VfUKvnie5m0HgQWrUo=; h=From:Subject:Reply-To:To:Cc:In-Reply-To:References:Date; b=onDgyYuJKgV44zugwU9gGwPzSAFyEAxTs/scsFiB0tU8kRJbXb2A3jG8IdykKNp2a 6zPxM0dPoTwCGGvxOZ6L/z3kL0BzkcEyREoh7k3n+otLvhLnxWcy6EDRvxrYzKOnei pbfH2+bz6mqvNyuTwv+igEJfT1jrvHfD5cyQWfg/qIhCrgVTz11baOAxOQ/ZCsKFlI v2CQGk+TuMgbV7PIVpo402NA6MWbw1y3+vG3NorVAg/o7Jz34JKpBJLofuMbBxMhbS 0jT1Es9hS8e2HE1WKQM/cfcJBAJtXrHgc4bBX0hlzElDzSAEuV3P1UHNzc+r7BUIlu W5xAOXdZJoAJw== Message-ID: From: sashiko-bot@kernel.org Subject: Re: [PATCH v1 4/8] s390/boot: Allow additional usable memory ranges Reply-To: sashiko-reviews@lists.linux.dev To: "Mikhail Zaslonko" , "Heiko Carstens" , "Vasily Gorbik" , "Alexander Gordeev" Cc: "Ilya Leoshkevich" , "Andrew Morton" , "Baoquan He" , "Mike Rapoport" , "Pasha Tatashin" , "Pratyush Yadav" , "Dave Young" , "Jiri Bohac" , "Jonathan Corbet" , "Usama Arif" , linux-s390@vger.kernel.org, kexec@lists.infradead.org, "Christian Borntraeger" In-Reply-To: <20261112112105.1169118-5-zaslonko@linux.ibm.com> References: <20261112112105.1169118-1-zaslonko@linux.ibm.com> <20261112112105.1169118-5-zaslonko@linux.ibm.com> Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable Date: Thu, 12 Nov 2026 11:33:16 +0000 X-Mailing-List: linux-s390@vger.kernel.org List-Id: List-Post: List-Help: List-Subscribe: List-Unsubscribe: List-Owner: Precedence: list > All online memory above the usable limit is left unused. A kdump kernel > will need a few ranges above that limit for the crashkernel CMA memory > of the crashed kernel. >=20 > Add physmem_add_usable_range() to register usable memory ranges. Clip > them to ident_map_size and merge overlapping or adjacent ranges. > for_each_physmem_usable_range() walks their intersection with the > online memory ranges. >=20 > Use the same ranges for boot allocations, identity mappings, KASAN > shadow and memblock. Keep the allocation position separate from the > usable ranges. >=20 > When no extra ranges are added, nothing changes. >=20 > Co-developed-by: Vasily Gorbik > Signed-off-by: Vasily Gorbik > Signed-off-by: Mikhail Zaslonko Sashiko has reviewed this patch and found no issues. --=20 Sashiko AI review =C2=B7 https://sashiko.dev/#/patchset/20261112112105.1169= 118-1-zaslonko@linux.ibm.com?part=3D4