From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from linux.microsoft.com (linux.microsoft.com [13.77.154.182]) by smtp.subspace.kernel.org (Postfix) with ESMTP id 2A28A3ABD82; Thu, 8 Oct 2026 16:55:29 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=13.77.154.182 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1791478530; cv=none; b=uj/82SB3JRIzAcYTVnT2/U9Nho+oYs7JvNzxY7zs8qjrl2EIKJ+JhGFsh2PIqwYCTZUxWu8soC8lXjKtPtcaxt2dmKuPTvyzxt2IJy+o3jc2yGHarLAj88FkZveN7xIyTuHwyr/Ftmp5/QP6eteEgqNMeEa03D/gwEllVi995DQ= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1791478530; c=relaxed/simple; bh=M+C7oa0qlOXJuKMG7trryJofZicerOzbBwHwVAwaveU=; h=Message-ID:Date:MIME-Version:Cc:Subject:To:References:From: In-Reply-To:Content-Type; b=O5XUe8B8ouEu1G+JBdb4OaLfyHEjxdNtS2kLHBnZRiMOc+wYxAr9ZSGTB/yRq8NewakQ1Nd1I0jzIlbvwzb1lUlARp3okAYoTKyE3x+yKugaoFoc7VOlMOrQgHyaDXD4KhGYd3SP6ObGwxH2mz6/qAbPyjPlIDAitUHltInySxY= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.microsoft.com; spf=pass smtp.mailfrom=linux.microsoft.com; dkim=pass (1024-bit key) header.d=linux.microsoft.com header.i=@linux.microsoft.com header.b=ndVOvjF0; arc=none smtp.client-ip=13.77.154.182 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.microsoft.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=linux.microsoft.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linux.microsoft.com header.i=@linux.microsoft.com header.b="ndVOvjF0" Received: from [100.64.161.192] (unknown [52.148.140.42]) by linux.microsoft.com (Postfix) with ESMTPSA id 69E0C20B7166; Thu, 8 Oct 2026 09:54:31 -0700 (PDT) DKIM-Filter: OpenDKIM Filter v2.11.0 linux.microsoft.com 69E0C20B7166 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linux.microsoft.com; s=default; t=1791478471; bh=wQpKVuFoBgYqlY1J3u33QmU+YvSK+kPYfJmYVLlAMbE=; h=Date:Cc:Subject:To:References:From:In-Reply-To:From; b=ndVOvjF0v5TjpIIKUCxIa7aFyX0OMDq+YZ5w3ISFZAd14VRUi/6WhSqfZS6WB8JH9 6zeboYeJJ6Hs+Ws8K54eL33IYMLRT+JW7P8DcUuseXIe7htN07hEPxMwD8ct8DJYVT yTJTI9wkW7Sa/LsTqC18qAXPT0ajckF/vgw/+A8E= Message-ID: <28fe612a-e91b-4825-bb8c-f34c893c2dec@linux.microsoft.com> Date: Thu, 8 Oct 2026 09:55:27 -0700 Precedence: bulk X-Mailing-List: linux-hyperv@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Cc: mhklinux@outlook.com, easwar.hariharan@linux.microsoft.com, kys@microsoft.com, haiyangz@microsoft.com, wei.liu@kernel.org, decui@microsoft.com, andrew+netdev@lunn.ch, davem@davemloft.net, edumazet@google.com, kuba@kernel.org, pabeni@redhat.com, gregkh@linuxfoundation.org, linux-kernel@vger.kernel.org, linux-hyperv@vger.kernel.org, netdev@vger.kernel.org Subject: Re: [PATCH v2 0/14] hv: vmbus: make rings and host-visible buffers survive buddy fragmentation To: Emerson Busson References: <20261007190752.336426-1-emersonbusson@gmail.com> From: Easwar Hariharan Content-Language: en-US In-Reply-To: <20261007190752.336426-1-emersonbusson@gmail.com> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit On 10/7/2026 12:07, Emerson Busson wrote: > This series moves VMBus ring backing to the chunk allocator and keeps the > allocation, GPADL ownership, and mapping references together. It preserves > the exported four-argument interfaces while allowing the private allocation > paths to carry ownership and sharing policy. > > A review of the original vzalloc fallback noted that CCA and TDX guests > without a paravisor need direct-map page transitions. This revision uses > contiguous chunks for buffers that must be host-shared, transitions each > page through page_address(), and combines the chunks with vmap(). Ordinary > guest-private buffers retain vzalloc-style allocation. > Can you provide a link to the v1 of this changeset and this "original vzalloc fallback" review? And a changelog and motivation for this series? Thanks, Easwar (he/him)