From owner-freebsd-current@FreeBSD.ORG Tue Aug 13 22:03:19 2013 Return-Path: Delivered-To: freebsd-current@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [8.8.178.115]) (using TLSv1 with cipher ADH-AES256-SHA (256/256 bits)) (No client certificate requested) by hub.freebsd.org (Postfix) with ESMTP id 2C507E71 for ; Tue, 13 Aug 2013 22:03:19 +0000 (UTC) (envelope-from jroberson@jroberson.net) Received: from mail-oa0-f51.google.com (mail-oa0-f51.google.com [209.85.219.51]) (using TLSv1 with cipher ECDHE-RSA-RC4-SHA (128/128 bits)) (No client certificate requested) by mx1.freebsd.org (Postfix) with ESMTPS id E84902931 for ; Tue, 13 Aug 2013 22:03:18 +0000 (UTC) Received: by mail-oa0-f51.google.com with SMTP id h1so12309926oag.10 for ; Tue, 13 Aug 2013 15:03:11 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20120113; h=x-gm-message-state:date:from:to:cc:subject:in-reply-to:message-id :references:user-agent:mime-version:content-type; bh=rYJJQaa9pNhOg/0Lb3doWeauQKJvopUyY0x8Qddx1OQ=; b=jv6kX6VDjXJslt4O0Wh+fhNqPHybsJrxaJJ16qQbRfdNBAHc2M3Kvn8K++cYUUGFDk JB19nzUuFovPu10CC+2z5RPpSy/uWvyNGHhXv9OPQ7Ay4ZJo4/E7WpcHtsoFE3Qc/LrW lc8jTPcPeiDX8fnhkmA1ss3z87UEVAyssyygo/tlNUM7/2wiB1JjAMTKjRCLTPJ1VIsf RFevrRKbYLjJDo/kYRlIeiNwTgf6Dm1/KUk4j/1GTlxKnZD5XPKNTysMx2X12ZTH5pwU lTez8Jhd8AYCWjkyCDGTMm6fWnLEf47rp8WVSDiMheb4GF0K81mED/FMfHAwwOeSjHF0 JN4w== X-Gm-Message-State: ALoCoQmkEsoSUZSMZUvH6a00cjbioQzYaLf5zjNBg79tTL+OpOsu6KNB9RX7RWLUhhVorXROmo1Q X-Received: by 10.60.52.101 with SMTP id s5mr3684806oeo.56.1376431391854; Tue, 13 Aug 2013 15:03:11 -0700 (PDT) Received: from rrcs-66-91-135-210.west.biz.rr.com (rrcs-66-91-135-210.west.biz.rr.com. [66.91.135.210]) by mx.google.com with ESMTPSA id n2sm41745287obo.6.2013.08.13.15.03.09 for (version=TLSv1 cipher=RC4-SHA bits=128/128); Tue, 13 Aug 2013 15:03:11 -0700 (PDT) Date: Tue, 13 Aug 2013 12:05:01 -1000 (HST) From: Jeff Roberson X-X-Sender: jroberson@desktop To: Colin Percival Subject: Re: panic: UMA: Increase vm.boot_pages with 32 CPUs In-Reply-To: <5208A488.2050603@freebsd.org> Message-ID: References: <5208A488.2050603@freebsd.org> User-Agent: Alpine 2.00 (BSF 1167 2008-08-23) MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII; format=flowed Cc: alc@freebsd.org, Attilio Rao , FreeBSD current , Konstantin Belousov X-BeenThere: freebsd-current@freebsd.org X-Mailman-Version: 2.1.14 Precedence: list List-Id: Discussions about the use of FreeBSD-current List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 13 Aug 2013 22:03:19 -0000 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 >