Date: Mon, 1 May 2023 02:04:22 +0200 From: Tomek CEDRO <tomek@cedro.info> To: Matthew Grooms <mgrooms@shrew.net>, Graham Perrin <grahamperrin@freebsd.org>, Ed Maste <emaste@freebsd.org> Cc: FreeBSD Hackers <freebsd-hackers@freebsd.org>, Virtualisation on FreeBSD <freebsd-virtualization@freebsd.org>, elenamihailescu22@gmail.com, Mihai Carabas <mihai.carabas@gmail.com>, gusev.vitaliy@gmail.com Subject: Re: BHYVE_SNAPSHOT Message-ID: <CAFYkXjkxm20P6%2BBJXV8pNoWReJVqikVFqZgeE=vK%2BXgNgthoAg@mail.gmail.com> In-Reply-To: <fe221c6a-acb7-ddbd-413d-7039de33e872@shrew.net> References: <ZEz8tU_83QfqbbMu@int21h> <fe221c6a-acb7-ddbd-413d-7039de33e872@shrew.net>
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--0000000000005719b605fa96918e Content-Type: text/plain; charset="UTF-8" o_O -- CeDeROM, SQ7MHZ, http://www.tomek.cedro.info On Sun, Apr 30, 2023, 23:42 Matthew Grooms <mgrooms@shrew.net> 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 > > > > --0000000000005719b605fa96918e Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable <div dir=3D"auto">o_O<br><br><div data-smartmail=3D"gmail_signature">--<br>= CeDeROM, SQ7MHZ, <a href=3D"http://www.tomek.cedro.info">http://www.tomek.c= edro.info</a></div></div><br><div class=3D"gmail_quote"><div dir=3D"ltr" cl= ass=3D"gmail_attr">On Sun, Apr 30, 2023, 23:42 Matthew Grooms <<a href= =3D"mailto:mgrooms@shrew.net">mgrooms@shrew.net</a>> wrote:<br></div><bl= ockquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1px #= ccc solid;padding-left:1ex">On 4/29/23 06:17, void wrote:<br> > Hi,<br> ><br> > Where can I read up about the recently introduced BHYVE_SNAPSHOT ?<br> ><br> > I can only find terse information about what it does (in man 5 src.con= f)<br> > but not about how to use it and/or why.<br> <br> This began as sponsored student work with the Politehnica University of <br= > Bucharest back in 2016 with an eye toward developing Live MIgration as a <b= r> feature. The initial bhyve save/restore patch was committed back in 2020 ..= .<br> <br> <a href=3D"https://reviews.freebsd.org/rS360648" rel=3D"noreferrer noreferr= er" target=3D"_blank">https://reviews.freebsd.org/rS360648</a><br>; <br> Student projects related to bhyve continued until last year, but we gave <b= r> up due to there being such a massive accumulation of patches with no <br> path to getting them committed. We tried reaching out to project <br> maintainers and the FreeBSD foundation alike for support and feedback, <br> but there seems to be little to no interest. There have also been <br> attempts by companies that rely on these features to and get them <br> improved and committed. Unfortunately they don't appear to be having <b= r> much luck either ...<br> <br> <a href=3D"https://reviews.freebsd.org/D38858#885651" rel=3D"noreferrer nor= eferrer" target=3D"_blank">https://reviews.freebsd.org/D38858#885651</a><br= > <br> Would you like to see support for VM snapshots in the generic kernel? <br> How about support for saving/restore checkpoints using QCOW2, VMDK via <br> libvdsk? How about support for warm or live migration? How about USB <br> device pass-through? There are experimental patches for all these <br> features that were developed by students at UPB. In a lot of cases, <br> there are open reviews that have been waiting on feedback for ages. Here <b= r> is a a presentation given by Elena from UPB just last month at the <br> FreeBSD devsumit in Tokyo ...<br> <br> <a href=3D"https://wiki.freebsd.org/DevSummit/202303?action=3DAttachFile&am= p;do=3Dview&target=3DPresentation+-+bhyvecon.pdf" rel=3D"noreferrer nor= eferrer" target=3D"_blank">https://wiki.freebsd.org/DevSummit/202303?action= =3DAttachFile&do=3Dview&target=3DPresentation+-+bhyvecon.pdf</a><br= > <br> The case is quite plain. I'm not sure what the solution is to this <br> problem. I'd love to hear feedback from the community about how I'v= e got <br> this completely wrong and how the course could be corrected. That would <br= > be something.<br> <br> -Matthew<br> <br> <br> <br> </blockquote></div> --0000000000005719b605fa96918e--
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