Messages in this thread | | | Subject | Re: [ANNOUNCE] KVM Microconference at LPC 2023 | Date | Wed, 7 Jun 2023 14:20:57 +0200 | From | Babis Chalios <> |
| |
On 7/6/23 12:37, Paolo Bonzini wrote: > CAUTION: This email originated from outside of the organization. Do > not click links or open attachments unless you can confirm the sender > and know the content is safe. > > > > On 6/7/23 12:13, Babis Chalios wrote: >> >> >> On our side, we 've been working on providing ways to let VMs (kernel >> and user space) know that they have been cloned/snapshotted/restored >> from snapshots[1]. >> >> This is tightly coupled with PRNGs both in kernel and user space and >> there needs to be some collaboration with random.c to tie everything >> together [2][3]. It sounds like it could be a good fit for this MC >> (?). > > Does the VM generation ID ACPI device from Microsoft work for you? It > is not tied to Hyper-V. > > Paolo >
It's a long story :P
TLDR:
For some use-cases it should be enough [1]. For PRNGs though it doesn't seem to work as is. (1) The Linux implementation of VMGENID is racy and (2) last year there were long discussions related to the user-space ABI, which diverged us away from it.
BTW, just saw that you have already submitted the proposal for the MC, sorry for being late :)
Cheers, Babis
| |