Re: [PATCH v2 0/1] Accept unaccepted kexec segments' destination addresses

[Jianxiong Gao]

> > It sounds like you're advocating for the "slow guest boot" option.
> > Kirill, can you remind us how fast a guest boots to the shell for
> > modestly-sized (say 256GB) memory with "accept_memory=eager" versus
> > "accept_memory=lazy"? IIRC, it was a pretty remarkable difference.
>
> I only have 128GB machine readily available and posted some number on
> other thread[1]:
>
>   On single vCPU it takes about a minute to accept 90GiB of memory.
>
>   It improves a bit with number of vCPUs. It is 40 seconds with 4 vCPU, but
>   it doesn't scale past that in my setup.
>
We have seen similar boot performance improvements on our larger shapes
of VMs. Both lazy accept and kexec with TDX are important features for us.


--
Jianxiong Gao