From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (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 336D02868A9 for ; Wed, 13 May 2026 16:08:03 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1778688483; cv=none; b=JxX3DzzwK5Ona9mqAmfXbqwBWGUY7caqoE+h/lZA1VZ59sq7cQUfMqGwTrkkuRwV6zbpamVtakGTjY/5vZw0TqOfMTKttj9VoRr2xvRFslvLeYN7GaNlxPSBYKa1vW6WGdHhXFizXbqFQ8MA496z+ppZEKlEU/f3kx5T2yldqNg= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1778688483; c=relaxed/simple; bh=s5dV3Zi4bs8mAbYDN7AwwP5y16K91uc+T+gnzG8BLaY=; h=Message-ID:Date:MIME-Version:Subject:To:Cc:References:From: In-Reply-To:Content-Type; b=CMMMPuLTugxM6BORKlhQqjjgcbqSIk+vz2hJR1Y10Xpz4fQOJGWZ9t9vsjkforWCl2Ldm5yx8mrhp4uytdUi8qbcWMHT8HoEDU0QVF28qzXt5pZ32yAbvvQ5ht3RlSpY6E/hm694qfTed13ezgC4xCR0HQhfU/OiyqTsmS0AZYo= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=g1oal/Sm; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="g1oal/Sm" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 0014CC19425; Wed, 13 May 2026 16:08:00 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1778688482; bh=s5dV3Zi4bs8mAbYDN7AwwP5y16K91uc+T+gnzG8BLaY=; h=Date:Subject:To:Cc:References:From:In-Reply-To:From; b=g1oal/Sm+ZkN4MPtagYCJpkWGo6YflyWlT3pUF5+YAOxzCUyxRVNrh0mfeDBxYXvE 8Nir+iQ56qD1lVapsllAoTK7b8lPMdpbzdFFWJNszZQM96nKwpzEfD4XH80OV5HKkW 5IiWGUdvO5vVLXAIhPHK57qO1XZ4YQ6txLrqJs+pvyMsjl/cgVq5k5QUd3tUIrbA9c vzH/Ok5VLo6JfiAoHAwy9vnHUUnGk18Yc1eVXwFpzip8NlfAzhV6BjK73Agu6FrW0G t+3af5YWGfFePe8NRQ+AtgD2lCaFbNPwCkeb+EvrEY77GH4xvgejcwjsxKwQIJweyQ VS7aXNqHlqtRA== Message-ID: <9f0b2894-ba79-4ef5-8be0-be8f4b5dd3ff@kernel.org> Date: Wed, 13 May 2026 18:07:58 +0200 Precedence: bulk X-Mailing-List: linux-cxl@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH] drivers/base/memory: set mem->altmap after successful device registration To: Georgi Djakov , akpm@linux-foundation.org Cc: linux-mm@kvack.org, linux-cxl@vger.kernel.org, osalvador@suse.de, gregkh@linuxfoundation.org, rafael@kernel.org, djakov@kernel.org References: <20260513130900.2204499-1-georgi.djakov@oss.qualcomm.com> 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 5/13/26 18:01, Georgi Djakov wrote: > Hi David, > > On 5/13/2026 4:20 PM, David Hildenbrand (Arm) wrote: >> On 5/13/26 15:14, David Hildenbrand (Arm) wrote: >>> >>> Something does not add up here. How do you get an altmap with virtio-mem? >> >> That patch itself makes sense, but the callchain does not make sense. >> >> virtio_mem does not set MHP_MEMMAP_ON_MEMORY, so it should never reach >> create_altmaps_and_memory_blocks()? > > I have some out of tree virtio_mem patches on top that helped to trigger > this. Sorry for not mentioning it. Should i remove the callchain from the > commit text to avoid confusion? Yes. You can mention that this was trigger by modifying virtio-mem. But the misleading calltrace should not be included. -- Cheers, David