Date: Tue, 13 Aug 2013 12:05:01 -1000 (HST) From: Jeff Roberson <jroberson@jroberson.net> To: Colin Percival <cperciva@freebsd.org> Cc: alc@freebsd.org, Attilio Rao <attilio@freebsd.org>, FreeBSD current <freebsd-current@freebsd.org>, Konstantin Belousov <kib@FreeBSD.org> Subject: Re: panic: UMA: Increase vm.boot_pages with 32 CPUs Message-ID: <alpine.BSF.2.00.1308131203350.4083@desktop> In-Reply-To: <5208A488.2050603@freebsd.org> References: <5208A488.2050603@freebsd.org>
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On Mon, 12 Aug 2013, Colin Percival wrote: > Hi all, > > A HEAD@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 >
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