From owner-freebsd-stable@FreeBSD.ORG Wed Aug 10 07:48:01 2011 Return-Path: Delivered-To: freebsd-stable@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 76A94106566B for ; Wed, 10 Aug 2011 07:48:01 +0000 (UTC) (envelope-from jdc@koitsu.dyndns.org) Received: from qmta06.emeryville.ca.mail.comcast.net (qmta06.emeryville.ca.mail.comcast.net [76.96.30.56]) by mx1.freebsd.org (Postfix) with ESMTP id 5E9438FC0A for ; Wed, 10 Aug 2011 07:48:01 +0000 (UTC) Received: from omta22.emeryville.ca.mail.comcast.net ([76.96.30.89]) by qmta06.emeryville.ca.mail.comcast.net with comcast id JXlw1h0031vN32cA6XnxFW; Wed, 10 Aug 2011 07:47:57 +0000 Received: from koitsu.dyndns.org ([67.180.84.87]) by omta22.emeryville.ca.mail.comcast.net with comcast id JXnz1h0021t3BNj8iXnz81; Wed, 10 Aug 2011 07:48:00 +0000 Received: by icarus.home.lan (Postfix, from userid 1000) id 30D67102C19; Wed, 10 Aug 2011 00:47:59 -0700 (PDT) Date: Wed, 10 Aug 2011 00:47:59 -0700 From: Jeremy Chadwick To: Daniel Kalchev Message-ID: <20110810074759.GA30254@icarus.home.lan> References: <4E4143A6.6030307@digsys.bg> <20110809151646.GF1814@albert.catwhisker.org> <4E422F8A.1070508@digsys.bg> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <4E422F8A.1070508@digsys.bg> User-Agent: Mutt/1.5.21 (2010-09-15) Cc: FreeBSD-STABLE Mailing List Subject: Re: 32GB limit per swap device? X-BeenThere: freebsd-stable@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Production branch of FreeBSD source code List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 10 Aug 2011 07:48:01 -0000 On Wed, Aug 10, 2011 at 10:13:14AM +0300, Daniel Kalchev wrote: > On 09.08.11 18:16, David Wolfskill wrote: > >While FreeBSD cannot address more than 32GB per swap space, it > >permits as many as 32 swap spaces to be active concurrently. > > I am more concerned that with 32GB of swap in single device I could > not dump kernel core, with 64GB of RAM. My apologies if I've misunderstood something, but why does this of any concern? Machine has 64GB RAM. You have a single swap slice that's effectively 32GB. How is a kernel panic worth of 64GB RAM going to fit into a 32GB swap slice? I think what folks are saying is that if you use multiple swap slices (e.g. two of 32GB each), you can achieve what you need. -- | Jeremy Chadwick jdc at parodius.com | | Parodius Networking http://www.parodius.com/ | | UNIX Systems Administrator Mountain View, CA, US | | Making life hard for others since 1977. PGP 4BD6C0CB |