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 6E8AB374E64 for ; Thu, 25 Jun 2026 10:42:13 +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=1782384136; cv=none; b=gSVPdaYPFbXKN+Tp7Nl/IOBLWKgYFf2r5vGAYICBL5Lne5MlpLs+VK/UUMHE5QHtPWEUV9g3pOmLBAdFb8Bc3iLhVBPTpK9pexHfAifVWst+4dNOmhg5L801lnAriYxu9KfZdP9rVP29YsHAhHRB6RPPCNY9oTHg5t5AOx7Ixdc= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1782384136; c=relaxed/simple; bh=GeSC9hWOyej6NpunnYFK7nn5c7WcGxZdBm3dpwR4nOs=; h=Message-ID:Date:MIME-Version:Subject:To:Cc:References:From: In-Reply-To:Content-Type; b=fJZlUkxI5MxMN4CdE10lyCQagNHz3gsH76qKCEOCMYJXvmSyi15ATysT4LiApsREdpYt0ISS+sCh2FIEhs5MdnctcQew2PH4ZhN8xI7VRMblDGiMujH3f3ATpffcBjtL60Xzw1WveKEeHLq2gyS2XAPobUxCsBHVzsJj+X4t4O4= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=eKJynOg1; 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="eKJynOg1" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 3F0491F00ACA; Thu, 25 Jun 2026 10:42:10 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1782384133; bh=M+hdF44mAriMWEPKasVyDUzCqOm9ZECGxYcFzR8hX8E=; h=Date:Subject:To:Cc:References:From:In-Reply-To; b=eKJynOg1SL3teW0kvvwJeaHW1wK1bz+B+ChirrsSaw/ZNTJVF1MR9afvhvEOb7I6K gwZt0ZIsLVG9ND2mcQYVCF0XcSdFjTAX5dJHivLSTEBDAvxeEAgCBg78eEZz81qGrL Y3qKCU3MV2cRsGzraivboSUxCkpdQqYcUxDdO5mlgdC4mgtOFVRji6XdzftEYt9Yeh bpfE9Rdv4xjlDxlfAfO9LbOVNFNqVZBLZR4IgaGGiLz182rh9xC62UN+XjDAwqqRw3 7KCKdd7ZJd1uS+ZrABmRT0WI29tDzTZCLrCaDmMwlvpauwlEz89sHk6d5Y2llMmXrc HcWySn1cCuONw== Message-ID: Date: Thu, 25 Jun 2026 12:42:09 +0200 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH 1/2] mm/mm_init: don't overlap NORMAL and MOVABLE zones with kernelcore=mirror To: Mike Rapoport , linux-mm@kvack.org Cc: Andrew Morton , Taku Izumi , Wei Yang , Yuan Liu , linux-kernel@vger.kernel.org References: <20260625073941.145014-1-rppt@kernel.org> <20260625073941.145014-2-rppt@kernel.org> From: "David Hildenbrand (Arm)" Content-Language: en-US Autocrypt: addr=david@kernel.org; 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charset=UTF-8 Content-Transfer-Encoding: 7bit On 6/25/26 09:39, Mike Rapoport wrote: > From: "Mike Rapoport (Microsoft)" > > When kernelcore or movablecore kernel parameters define size of the > NORMAL and MOVABLE zones as percents of the total memory or by absolute > value, ZONE_NORMAL is clamped at the beginning of ZONE_MOVABLE. > > However, when kernelcore=mirror the ZONE_NORMAL span is not changed but > rather pages from ZONE_MOVABLE counted as absent in ZONE_NORMAL. > > Make the behaviour of kernelcore= parameter uniform and treat mirror > just as another way to size the zones. That sounds just about right to me. Hard to imagine that any code would have relied on the old behavior. Reviewed-by: David Hildenbrand (Arm) -- Cheers, David