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Re: [Qemu-devel] about live memory snapshot
From: |
Peter Xu |
Subject: |
Re: [Qemu-devel] about live memory snapshot |
Date: |
Mon, 2 Jul 2018 18:53:25 +0800 |
User-agent: |
Mutt/1.10.0 (2018-05-17) |
On Sat, Jun 30, 2018 at 01:45:29AM +0000, Gonglei (Arei) wrote:
> Hi Peter,
>
> As we discussed in LC3 China, the current scheme of "migration to file"
> can't fit on production environment, which will cause the snapshot file
> bigger
> and bigger when the guest is under enough memory pressure. We can't
> assume what size the snapshot file is.
>
> Pls have a look if we have a simple method to resolve the problem. :)
Yeah, it seems that the requirement of this live snapshot feature is
there for a long time but we haven't yet figured out a good way to
solve it.
>
> PS: the below link is zhanghailiang's scheme based on userfaultfd.
>
> https://lists.gnu.org/archive/html/qemu-devel/2016-01/msg00664.html
Thanks for the pointer!
Just to mention that there is another ongoing work from Denis that
implemented similar feature but with mprotect() and a new
(to-be-proposed?) kvm interface:
http://lists.gnu.org/archive/html/qemu-devel/2018-06/msg08684.html
Hopefully we can figure something out soon on the list.
Regards,
--
Peter Xu
- Re: [Qemu-devel] about live memory snapshot,
Peter Xu <=