From nobody Mon May 01 00:45:56 2023 X-Original-To: freebsd-hackers@mlmmj.nyi.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mlmmj.nyi.freebsd.org (Postfix) with ESMTP id 4Q8kzN553qz48WpS; Mon, 1 May 2023 00:46:08 +0000 (UTC) (envelope-from marietto2008@gmail.com) Received: from mail-yw1-x112b.google.com (mail-yw1-x112b.google.com [IPv6:2607:f8b0:4864:20::112b]) (using TLSv1.3 with cipher TLS_AES_128_GCM_SHA256 (128/128 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256 client-signature RSA-PSS (2048 bits) client-digest SHA256) (Client CN "smtp.gmail.com", Issuer "GTS CA 1D4" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 4Q8kzN3T4jz4ZmM; Mon, 1 May 2023 00:46:08 +0000 (UTC) (envelope-from marietto2008@gmail.com) Authentication-Results: mx1.freebsd.org; none Received: by mail-yw1-x112b.google.com with SMTP id 00721157ae682-55a00da4e53so20829927b3.0; Sun, 30 Apr 2023 17:46:08 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20221208; t=1682901967; x=1685493967; h=cc:to:subject:message-id:date:from:in-reply-to:references :mime-version:from:to:cc:subject:date:message-id:reply-to; bh=OLH7E+tNyMAOlFTmQ3zboPvehIf56Te4NVP8VPyTTDU=; b=DSQCRPiSGgG3tn6Pzypqt3oN7zB4N+46aUv4gN0FSd84ZbpNOmMnzoRHkDdFIWmQOW b+BDZq/2Khj1R/oE3Lj0P4jqyE2FGGQk/3PM5oiJboDb4i3dFV2d/DpsV1WP/EcX1jXj TFR1S+ENGiGHkj1JmM6RV3IRjEh6rdm83U/NxeuYcB9HN4Ev402b86mmZe1W+b0/H4rA NKCxSFeHiZ7qp/XKGDI8ALm1+cwWNgREHmK1JFVOa0mVCSvOOukTyhdivKqXPVyfUL9u Q84XsN4pFqnp1lGkgkrZSqesQr8eVAnTngFscomJWGo7sdm5xnGZ1mwFvfBeMmDa/RZe cM2w== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1682901967; x=1685493967; h=cc:to:subject:message-id:date:from:in-reply-to:references :mime-version:x-gm-message-state:from:to:cc:subject:date:message-id :reply-to; bh=OLH7E+tNyMAOlFTmQ3zboPvehIf56Te4NVP8VPyTTDU=; b=hCzdzzduSCCt72ySVTpXao+2jgExHj4mwdU7F/p1OZ/nHJaG7LlDK8OHOZwV06VwdF PE/eOajEwmBcX83/k8ghliB4/8wCSQ9Mz+Lvu4uUgm7Z40k0h6zj5dmh94Nhvd0toCPE 0buUO0NjqqNZjIjTmWkzX1DakB4p9EPiWPVcrTVSs3iiwk/q7Xke98Arrlrl9pcMPJ75 1Sk+oj7WV2D4jW9gwvfzo6OGULcXkEJRde+z5eDMfg1TEPIMRMFjzwpo7XVB9Ljgvrtp BsvkuYFcV5yB4BfFOGDYkc5MZ6EUYrBFebn2lrZJWqLQyLoWGR+/bEaK6lBE2zI48i+f g7Ag== X-Gm-Message-State: AC+VfDwL6WJITxNAGiQ3Nr5AKz7coHGeuYia1D86Re4J66lj2YX+6YSr F4Gwgow9XKrG2ZC9aZaXrMfElfnshcnbNnaTMG0= X-Google-Smtp-Source: ACHHUZ7Qmoatazbvvxk4LXs0v60QS2uLutzQkmU3Mq5dBFA2wX00HG/yo843iLvNCwJJKJOzB6Rk5UppoNlQKrfCok0= X-Received: by 2002:a81:71d6:0:b0:559:f52b:7c5f with SMTP id m205-20020a8171d6000000b00559f52b7c5fmr4941081ywc.17.1682901967597; Sun, 30 Apr 2023 17:46:07 -0700 (PDT) List-Id: Technical discussions relating to FreeBSD List-Archive: https://lists.freebsd.org/archives/freebsd-hackers List-Help: List-Post: List-Subscribe: List-Unsubscribe: Sender: owner-freebsd-hackers@freebsd.org MIME-Version: 1.0 References: In-Reply-To: From: Mario Marietto Date: Mon, 1 May 2023 02:45:56 +0200 Message-ID: Subject: Re: BHYVE_SNAPSHOT To: Tomek CEDRO Cc: Matthew Grooms , Graham Perrin , Ed Maste , FreeBSD Hackers , Virtualisation on FreeBSD , elenamihailescu22@gmail.com, Mihai Carabas , gusev.vitaliy@gmail.com Content-Type: multipart/alternative; boundary="000000000000f8772005fa9725dd" X-Rspamd-Queue-Id: 4Q8kzN3T4jz4ZmM X-Spamd-Bar: ---- X-Spamd-Result: default: False [-4.00 / 15.00]; REPLY(-4.00)[]; ASN(0.00)[asn:15169, ipnet:2607:f8b0::/32, country:US]; TAGGED_RCPT(0.00)[] X-Rspamd-Pre-Result: action=no action; module=replies; Message is reply to one we originated X-ThisMailContainsUnwantedMimeParts: N --000000000000f8772005fa9725dd Content-Type: text/plain; charset="UTF-8" whats the meaning of o_O ? Il lun 1 mag 2023, 02:04 Tomek CEDRO ha scritto: > o_O > > -- > CeDeROM, SQ7MHZ, http://www.tomek.cedro.info > > On Sun, Apr 30, 2023, 23:42 Matthew Grooms wrote: > >> On 4/29/23 06:17, void wrote: >> > Hi, >> > >> > Where can I read up about the recently introduced BHYVE_SNAPSHOT ? >> > >> > I can only find terse information about what it does (in man 5 src.conf) >> > but not about how to use it and/or why. >> >> This began as sponsored student work with the Politehnica University of >> Bucharest back in 2016 with an eye toward developing Live MIgration as a >> feature. The initial bhyve save/restore patch was committed back in 2020 >> ... >> >> https://reviews.freebsd.org/rS360648 >> >> Student projects related to bhyve continued until last year, but we gave >> up due to there being such a massive accumulation of patches with no >> path to getting them committed. We tried reaching out to project >> maintainers and the FreeBSD foundation alike for support and feedback, >> but there seems to be little to no interest. There have also been >> attempts by companies that rely on these features to and get them >> improved and committed. Unfortunately they don't appear to be having >> much luck either ... >> >> https://reviews.freebsd.org/D38858#885651 >> >> Would you like to see support for VM snapshots in the generic kernel? >> How about support for saving/restore checkpoints using QCOW2, VMDK via >> libvdsk? How about support for warm or live migration? How about USB >> device pass-through? There are experimental patches for all these >> features that were developed by students at UPB. In a lot of cases, >> there are open reviews that have been waiting on feedback for ages. Here >> is a a presentation given by Elena from UPB just last month at the >> FreeBSD devsumit in Tokyo ... >> >> >> https://wiki.freebsd.org/DevSummit/202303?action=AttachFile&do=view&target=Presentation+-+bhyvecon.pdf >> >> The case is quite plain. I'm not sure what the solution is to this >> problem. I'd love to hear feedback from the community about how I've got >> this completely wrong and how the course could be corrected. That would >> be something. >> >> -Matthew >> >> >> >> --000000000000f8772005fa9725dd Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable
whats the meaning of o_O ?

Il lun 1 mag 2023, 02:04 Tomek = CEDRO <tomek@cedro.info> ha s= critto:
o_O

On Sun, Apr 30, 2023, 23:42 Matthew Grooms &l= t;mgrooms@shrew.net> wrote:
O= n 4/29/23 06:17, void wrote:
> Hi,
>
> Where can I read up about the recently introduced BHYVE_SNAPSHOT ?
>
> I can only find terse information about what it does (in man 5 src.con= f)
> but not about how to use it and/or why.

This began as sponsored student work with the Politehnica University of Bucharest back in 2016 with an eye toward developing Live MIgration as a feature. The initial bhyve save/restore patch was committed back in 2020 ..= .

https://reviews.freebsd.org/rS360648
Student projects related to bhyve continued until last year, but we gave up due to there being such a massive accumulation of patches with no
path to getting them committed. We tried reaching out to project
maintainers and the FreeBSD foundation alike for support and feedback,
but there seems to be little to no interest. There have also been
attempts by companies that rely on these features to and get them
improved and committed. Unfortunately they don't appear to be having much luck either ...

https://reviews.freebsd.org/D38858#88= 5651

Would you like to see support for VM snapshots in the generic kernel?
How about support for saving/restore checkpoints using QCOW2, VMDK via
libvdsk? How about support for warm or live migration? How about USB
device pass-through? There are experimental patches for all these
features that were developed by students at UPB. In a lot of cases,
there are open reviews that have been waiting on feedback for ages. Here is a a presentation given by Elena from UPB just last month at the
FreeBSD devsumit in Tokyo ...

https://wiki.freebsd.org/DevSummit/20= 2303?action=3DAttachFile&do=3Dview&target=3DPresentation+-+bhyvecon= .pdf

The case is quite plain. I'm not sure what the solution is to this
problem. I'd love to hear feedback from the community about how I'v= e got
this completely wrong and how the course could be corrected. That would be something.

-Matthew



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