From owner-freebsd-arm@FreeBSD.ORG Wed Feb 20 21:11:09 2013 Return-Path: Delivered-To: freebsd-arm@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:1900:2254:206a::19:1]) by hub.freebsd.org (Postfix) with ESMTP id 3F3A58D4 for ; Wed, 20 Feb 2013 21:11:09 +0000 (UTC) (envelope-from imp@bsdimp.com) Received: from mail-gg0-x229.google.com (gg-in-x0229.1e100.net [IPv6:2607:f8b0:4002:c02::229]) by mx1.freebsd.org (Postfix) with ESMTP id 05D7D740 for ; Wed, 20 Feb 2013 21:11:08 +0000 (UTC) Received: by mail-gg0-f169.google.com with SMTP id j5so1087120ggn.28 for ; Wed, 20 Feb 2013 13:11:08 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20120113; h=x-received:sender:subject:mime-version:content-type:from :in-reply-to:date:cc:content-transfer-encoding:message-id:references :to:x-mailer:x-gm-message-state; bh=LajH/BkVlTcasgGP5xMwq2qaVxnxutjpZ3VmKwU7Rbk=; b=g2meKwZrK2GngtzSz0/i5odkbSGEwkTAijLO39Ge1woHlfmd1kXjqJMmA1hso9Pm3+ XtJfUovCi8j/FJDMJstIE6gYaVOIfprhuyOQBWPUmx2RLl7oSLXcvaEqGE0G3KFNWC+S JmlFXN4TNc7QLZ/0UOeWRVW1ezkSfswH3MOebqCm0KnqpwXQZZS+jH6wVvfDoT6h+Zrj jfJEUHkR2DhH/JN6JG3e001UPG7XiSm0wQ3chQbff9KY0l9u0hiqiB9FKRgh237Bokad V/YnlkZwu6mzZuUhuEOK1zh7XRxQLSMY39o4RRF7Q9oE/MSiYarWB5XiARD8BawfY2ZS sqMw== X-Received: by 10.236.119.69 with SMTP id m45mr38850651yhh.128.1361394668596; Wed, 20 Feb 2013 13:11:08 -0800 (PST) Received: from fusionlt2834a.int.fusionio.com ([209.117.142.2]) by mx.google.com with ESMTPS id o8sm13251433ani.4.2013.02.20.13.11.06 (version=TLSv1 cipher=ECDHE-RSA-RC4-SHA bits=128/128); Wed, 20 Feb 2013 13:11:07 -0800 (PST) Sender: Warner Losh Subject: Re: zfs on arm Mime-Version: 1.0 (Apple Message framework v1085) Content-Type: text/plain; charset=us-ascii From: Warner Losh In-Reply-To: <20130220153519.7626984a@ivory.wynn.com> Date: Wed, 20 Feb 2013 14:11:05 -0700 Content-Transfer-Encoding: quoted-printable Message-Id: <3B5DE103-7042-4FBE-B883-2856E73BFE6E@bsdimp.com> References: <20130220134556.3499369c@ivory.wynn.com> <20130220202537.705decddfaa2b4a495dc5e1d@sohara.org> <20130220153519.7626984a@ivory.wynn.com> To: Brett Wynkoop X-Mailer: Apple Mail (2.1085) X-Gm-Message-State: ALoCoQk6iAHdZIf6gp+uQmldzqex8zQbGYN231mzf647asN+kEr/m7BLI6yx9OIztzKMkDP6hrlg Cc: freebsd-arm@freebsd.org X-BeenThere: freebsd-arm@freebsd.org X-Mailman-Version: 2.1.14 Precedence: list List-Id: Porting FreeBSD to the StrongARM Processor List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 20 Feb 2013 21:11:09 -0000 On Feb 20, 2013, at 1:35 PM, Brett Wynkoop wrote: > On Wed, 20 Feb 2013 20:25:37 +0000 > "Steve O'Hara-Smith" wrote: >=20 >> ZFS in 256MB (or 512MB if you have a later model B), isn't >> that pushing things just a little, given that 4GB is considered small >> memory for ZFS. >>=20 >=20 > Greeting- >=20 > There are many cases of x86 boxes running zfs with 512M and 768M of > memory. It takes some tweaking, but it works after the correct > adjustments. =20 >=20 > I think a 512M Pi should be able to do zfs just fine. =20 I've done this on x86 with 640MB, but it requires a lot of hand tuning. = You should be able to build the kernel (most likely the OPENSOLARIS = issue is just moving from options.* to options, mostly), but you'll = encounter resource starvation issues until the tuning is right. :( But = that was in the 7.x timeframe, iirc, and that was so many ZFS revisions = ago... Warner