From owner-freebsd-stable@FreeBSD.ORG Tue Jun 8 11:10:36 2010 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 E5846106564A for ; Tue, 8 Jun 2010 11:10:36 +0000 (UTC) (envelope-from jdc@koitsu.dyndns.org) Received: from qmta15.emeryville.ca.mail.comcast.net (qmta15.emeryville.ca.mail.comcast.net [76.96.27.228]) by mx1.freebsd.org (Postfix) with ESMTP id CAE9C8FC0C for ; Tue, 8 Jun 2010 11:10:36 +0000 (UTC) Received: from omta15.emeryville.ca.mail.comcast.net ([76.96.30.71]) by qmta15.emeryville.ca.mail.comcast.net with comcast id TP8b1e0011Y3wxoAFPAcZs; Tue, 08 Jun 2010 11:10:36 +0000 Received: from koitsu.dyndns.org ([98.248.46.159]) by omta15.emeryville.ca.mail.comcast.net with comcast id TPAb1e0093S48mS8bPAb3G; Tue, 08 Jun 2010 11:10:36 +0000 Received: by icarus.home.lan (Postfix, from userid 1000) id 52DDD9B42E; Tue, 8 Jun 2010 04:10:35 -0700 (PDT) Date: Tue, 8 Jun 2010 04:10:35 -0700 From: Jeremy Chadwick To: Yoshiaki Kasahara Message-ID: <20100608111035.GA3014@icarus.home.lan> References: <4BE82C5D.1080806@bit0.com> <20100608.181146.1224841629154014733.kasahara@nc.kyushu-u.ac.jp> <20100608095444.GA86953@icarus.home.lan> <20100608.192645.266793829033956713.kasahara@nc.kyushu-u.ac.jp> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20100608.192645.266793829033956713.kasahara@nc.kyushu-u.ac.jp> User-Agent: Mutt/1.5.20 (2009-06-14) Cc: pjd@freebsd.org, freebsd-stable@freebsd.org Subject: Re: Freebsd 8.0 kmem map too small 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: Tue, 08 Jun 2010 11:10:37 -0000 On Tue, Jun 08, 2010 at 07:26:45PM +0900, Yoshiaki Kasahara wrote: > On Tue, 8 Jun 2010 02:54:44 -0700, > Jeremy Chadwick said: > > > I realise you're talking about amd64, but I'm not sure how UMA is > > getting enabled on i386 to begin with. It does look like it's enabled > > on amd64 by default. > > I believe that this thread had been started before this tunable was > introduced on May 24th. Before that, ZIO_USE_UMA was used to control > the use of UMA, and it was enabled unconditionally in > /usr/src/sys/modules/zfs. Yoshiaki, thanks for the tip. I didn't check CVS commit logs to see when this tunable was introduced. It appears that the systems I'm looking at don't have the use_uma tunable because the kernel was built from RELENG_8 code dated May 23rd. This would also explain why Pete sees the tunable and I don't. Wish this stuff was documented somewhere. :-) -- | Jeremy Chadwick jdc@parodius.com | | Parodius Networking http://www.parodius.com/ | | UNIX Systems Administrator Mountain View, CA, USA | | Making life hard for others since 1977. PGP: 4BD6C0CB |