Re: panic: UMA: Increase vm.boot_pages with 32 CPUs

From: Jeff Roberson <jroberson_at_jroberson.net>
Date: Tue, 13 Aug 2013 12:05:01 -1000 (HST)
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
>
Received on Tue Aug 13 2013 - 20:03:19 UTC

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