panic: UMA: Increase vm.boot_pages with 32 CPUs

[Jeff Roberson]

On Mon, 12 Aug 2013, Colin Percival wrote:

> Hi all,
>
> A HEAD at 254238 kernel fails to boot in EC2 with
>> panic: UMA: Increase vm.boot_pages
> on 32-CPU instances.  Instances with up to 16 CPUs boot fine.
>
> I know there has been some mucking about with VM recently -- anyone want
> to claim this, or should I start doing a binary search?

It's not any one commit really, just creeping demand for more pages before 
the VM can get started.  I would suggest making boot pages scale with 
MAXCPU.  Or just raising it as the panic suggests.  We could rewrite the 
way that the vm gets these early pages but it's a lot of work and 
typically people just bump it and forget about it.

Thanks,
Jeff

>
> -- 
> Colin Percival
> Security Officer Emeritus, FreeBSD | The power to serve
> Founder, Tarsnap | www.tarsnap.com | Online backups for the truly paranoid
>