From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.133.124]) (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 1984C14BF92 for ; Thu, 1 Aug 2024 22:12:29 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=170.10.133.124 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1722550351; cv=none; b=fKopQDqBZBKppggun/K8uyZ4SWF4j3PJT/YWamCpULyeoZfqp/NLN8be56C0SIBx7LoysPwisyW7WzbqhYMR+DQW9W4aUrz5qyoynvJ250sbgMMS4jxeTpr3gYYTKBjL3F86xu3scx31/MJOtEGTQplcccRHbTTdLnALNy4JWaI= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1722550351; c=relaxed/simple; bh=0UTEUABwLl9nPHyasmA3Zw/bHjsSB/lUKnDNzfoDXeg=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=WlVBLPNAMUiwVL963ry0hfmMpucqROMmvjzXd2P0hgkVC6RxzYqk6QrAa9XKUjYVj6yPHQ9AzggTHzBg4J52sEBFtKF/VIm0VnnMT7of49yZ5FEygGAueP1zxbyEtLpzBzhLl28BLqA+UxX9q1dd0TRNCsuFlaDDDVWH9iq9AyA= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=redhat.com; spf=pass smtp.mailfrom=redhat.com; dkim=pass (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b=MWC2XevP; arc=none smtp.client-ip=170.10.133.124 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=redhat.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=redhat.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b="MWC2XevP" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1722550349; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: in-reply-to:in-reply-to:references:references; bh=oEkakUjv0oShqAlgA+JoFFoT773rpEPOk5LHphGKBXA=; b=MWC2XevPWxNDw4qHj4RffqWocP21wC3ik63MipWViTP9C6o5TbEGIjsvw9iPXyxMX7AEca gtZbob4SnkGUsEMYy/IWagT1nwxgDzsdkVsfLv1/wWMGMI3dr3Xw8ZbumLyHzvZNUZqbFs nX0CCY97dfgrktqxacWmXQaz2w+U7Ww= Received: from mail-qv1-f69.google.com (mail-qv1-f69.google.com [209.85.219.69]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.3, cipher=TLS_AES_256_GCM_SHA384) id us-mta-408-qOn1K_FxORSo7BZ3WOcnBg-1; Thu, 01 Aug 2024 18:12:27 -0400 X-MC-Unique: qOn1K_FxORSo7BZ3WOcnBg-1 Received: by mail-qv1-f69.google.com with SMTP id 6a1803df08f44-6b79ccc1504so12531406d6.3 for ; Thu, 01 Aug 2024 15:12:27 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1722550347; x=1723155147; h=in-reply-to:content-disposition:mime-version:references:message-id :subject:cc:to:from:date:x-gm-message-state:from:to:cc:subject:date :message-id:reply-to; bh=oEkakUjv0oShqAlgA+JoFFoT773rpEPOk5LHphGKBXA=; b=XGo4cWEch3mpBITbHclLFWk3WYuh72V9oJZSZu4XgNt4zX/faSdVnni5o7yX1DyNJ2 jo708+QLLp3YxgyUZBifoVrbWTkTp9Dg8yTGbs9RNk+d2Do6L/GjU/6V2X+oIq7WJaox egYzLL5NpFHXLGMNktQtbfqHsulxKdlzHII1u+Bl0bYPvsQwqU6LP6s4qXPUJzfSy/hu PvTaGHLr08vCRt+Ush/Xk6bwR4rENBFTPBE+9EuZNopLczwzR/MHHw3RQEP6J8F13UQ8 ul6pF3wqR9/lt+Ueo7fS/3Cs2FHyU6Ycz/LqdiLgfEb9BvPM+BNAuexhI6HxXQvoNfUt bTbg== X-Forwarded-Encrypted: i=1; AJvYcCUXVO3GWXjSU0FsFBPL7q07PiNTLfaqcN9AmCZ1fknpqjRdhUc82f53JCyqj4VXQWmE347Pf2QesYU=@vger.kernel.org X-Gm-Message-State: AOJu0YxUNzigW17MGf7YreDf7gP4CIAcM225lJJR3uoWgYbwyCO4/d+N re5qSzbzhn9vwvBrntuIqpW6hi5kMYX9qUekSvdX2UHWZ7eAGpdfcEQeE8Da81JxXB1cvpmxd0x OlcYfSw07Ci4YTr9JHxfcbNBLmANd5Z63CLKQYzyvmKQ+DL/7kt+BOkhg1Q== X-Received: by 2002:a05:6214:c48:b0:6b7:586c:2cf9 with SMTP id 6a1803df08f44-6bb98477071mr10740546d6.8.1722550347295; Thu, 01 Aug 2024 15:12:27 -0700 (PDT) X-Google-Smtp-Source: AGHT+IHYiPlQnhQgnszBxOlYnmcmzkuBRtiLsO/YtZH3gTULjwGEVWYGXNe4E6cY2VjLct5v9IMvig== X-Received: by 2002:a05:6214:c48:b0:6b7:586c:2cf9 with SMTP id 6a1803df08f44-6bb98477071mr10740356d6.8.1722550346938; Thu, 01 Aug 2024 15:12:26 -0700 (PDT) Received: from x1n (pool-99-254-121-117.cpe.net.cable.rogers.com. [99.254.121.117]) by smtp.gmail.com with ESMTPSA id 6a1803df08f44-6bb9c77099asm1039296d6.12.2024.08.01.15.12.25 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 01 Aug 2024 15:12:26 -0700 (PDT) Date: Thu, 1 Aug 2024 18:12:23 -0400 From: Peter Xu To: James Houghton Cc: Paolo Bonzini , Marc Zyngier , Oliver Upton , James Morse , Suzuki K Poulose , Zenghui Yu , Sean Christopherson , Shuah Khan , Axel Rasmussen , David Matlack , kvm@vger.kernel.org, linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, kvmarm@lists.linux.dev Subject: Re: [RFC PATCH 00/18] KVM: Post-copy live migration for guest_memfd Message-ID: References: <20240710234222.2333120-1-jthoughton@google.com> Precedence: bulk X-Mailing-List: linux-doc@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline In-Reply-To: On Wed, Jul 10, 2024 at 04:48:36PM -0700, James Houghton wrote: > Ah, I put the wrong email for Peter! I'm so sorry! So I have a pure (and even stupid) question to ask before the rest of details.. it's pure question because I know little on guest_memfd, especially on the future plans. So.. Is there any chance guest_memfd can in the future provide 1G normal (!CoCo) pages? If yes, are these pages GUP-able, and mapp-able? Thanks, -- Peter Xu