Re: [PATCH 0/1] User space notifications about VM cloning

Babis Chalios
2023-06-16T15:07:45Z

Hello all,

Some time has passed since I sent this. Any comments/thoughts?

On 31/5/23 11:51, Babis Chalios wrote:
> This patch revisits the story of user space notification about VM
> events. It uses uevents to send a notification to user space that the
> VMGENID has changed, thus we are now in a new VM.
>
> Please note, that this is not a "you need to reseed your PRNGs" event,
> which was what the previous RFC [1] was trying to do. It is, explicitly,
> meant to be a "you are now running in a new VM" event for the user space
> to consume, so it can do things like regenerating its MAC addresses and
> refreshing DHCP. For these cases, we do not want to tie on the "you need
> to reseed your PRNGs" event, since these do not necessarily get emitted
> only when VMs get cloned.
>
> [1] https://lore.kernel.org/lkml/65d872db2e1be29bb03b43ed606e7cc9e74ec08d.camel@infradead.org/T/
>
> Babis Chalios (1):
> vmgenid: emit uevent when VMGENID updates
>
> drivers/virt/vmgenid.c | 2 ++
> 1 file changed, 2 insertions(+)
>

Cheers,
Babis