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 6A9892FD7BE; Wed, 7 Jan 2026 21:52:37 +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=1767822757; cv=none; b=SavNIUD4V7Oa3gS1u0+TlVwft8d2rr8zoJ6yeA9HO8V6nznLY4O61BvJ3C3JkHJ9LGglbgOkFPAQ5DQ/8rRYmXvCxaii1gNAsog5YIME35MjZMgFi7M/6wQYeh7BSOgpSJaE9Mc6ZVvnzuQoDInX60vbg7GYh0z4DrWQRED4vPo= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1767822757; c=relaxed/simple; bh=RFll13xZ/a5vC1iqrVrPAUqu5AGsBMq8qegGaJ9IV3o=; h=Message-ID:Date:MIME-Version:Subject:To:References:From:Cc: In-Reply-To:Content-Type; b=pXxLJCUdfh1vz8bvHwF875EpJ6gFUXln6DP45s69jn2YW9ojB54FtJg/glka0xg9gqH0SBlXfpHmnxHknqIvQqo9Cyjb2ipPg65jnPPjxeXW/oOnOBWt8x1KuFLEa1z6Ur+o6GXMSbw99D9bD0EN1MtvaZaMT3aZp3hs+nPrW0c= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=kzuQX9u/; 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="kzuQX9u/" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 67FEFC4CEF1; Wed, 7 Jan 2026 21:52:35 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1767822757; bh=RFll13xZ/a5vC1iqrVrPAUqu5AGsBMq8qegGaJ9IV3o=; h=Date:Subject:To:References:From:Cc:In-Reply-To:From; b=kzuQX9u/cZr0QC7rtGsqNU2g8oz3UN556bmK7px+7qe0KfaGafNnQSF2uKAobn4gn c5wZGdvUbvGUo9i0PJ3pb1Bj4HrPQQ4PEwKvP9Qggas/f/nKSy4vViL0IyEafDPObU rnf1Pb4C7Esc2PZ8u0sPSQ55JMiuG17wzQELDBoPvUpPIwzVBGM79vvR6r4bnefHE6 OWCYAEgt2UBlH3gS3ZEI0/gUWw6yBU54EbRSfqP0iAGFDfj+SH+t4h9yJf817nmLer RgOaozskdLOCIerGzgT9YGtBPGAk12Q9ngyJlLnGMo2Oh+kvrY1G55YhWpgdRuFFzN Cdk8bCTPZqElA== Message-ID: <7737563a-c2b8-4e9e-ac18-3551ed9d1a33@kernel.org> Date: Wed, 7 Jan 2026 22:52:32 +0100 Precedence: bulk X-Mailing-List: linux-coco@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [Invitation] bi-weekly guest_memfd upstream call on 2025-12-04 To: dan.j.williams@intel.com, "linux-coco@lists.linux.dev" , "linux-mm@kvack.org" , KVM References: <66c32ad4-a59a-425e-8a00-bcfb918e7559@kernel.org> <695ec54cf5c3_875d1009d@dwillia2-mobl4.notmuch> From: "David Hildenbrand (Red Hat)" Content-Language: en-US Cc: Ackerley Tng Autocrypt: addr=david@kernel.org; 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charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit On 1/7/26 21:42, dan.j.williams@intel.com wrote: > David Hildenbrand (Red Hat) wrote: > [..] >> This might be the last meeting this year: I will be traveling for LPC on >> December 11 and December 18. Then, Christmas is already around the >> corner and we'll skip the one on December 25. So we'll probably have our >> next meeting then on January 8. > > Hi David, Hi Dan! > > Great seeing you at LPC! Absolutely :) > Can I grab some time on the agenda to > brainstorm the next level of detail on the topic I briefly ran by you in > the hallway track? I.e. is there a path to decouple dependencies and > land some of the low level huge page support upstream while the > guest_memfd reworks for in place conversion and hugetlbfs backing > continue to mature? Yes, Ackerley already added that to the meeting agenda :) > > As you said this at a minimum needs to be crippled / not production > worthy to maintain focus and momentum on the guest_memfd rework > completion. The observation that shifted my thinking is that, given the > timelines and remaining work, there are solid steps that the low level > implementations can be landing and maturing in advance of that > integration. All net progress for upstream. Right, I think we're good as long as we don't start splitting folios on partial truncation. That is: only allow truncation in THP granularity. I might not be around tomorrow and Ackerley will likely lead the meeting. I'll send out a reminder mail now that I realize I haven't ... -- Cheers David