From owner-freebsd-xen@FreeBSD.ORG Fri Mar 4 14:27:20 2011 Return-Path: Delivered-To: freebsd-xen@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 305F11065670 for ; Fri, 4 Mar 2011 14:27:20 +0000 (UTC) (envelope-from joe@tao.org.uk) Received: from alpha.tao.org.uk (alpha.tao.org.uk [212.42.1.232]) by mx1.freebsd.org (Postfix) with ESMTP id EAB258FC13 for ; Fri, 4 Mar 2011 14:27:19 +0000 (UTC) Received: from localhost (alpha.tao.org.uk [212.42.1.232]) by alpha.tao.org.uk (Postfix) with ESMTP id 5CB701076DBA; Fri, 4 Mar 2011 14:11:35 +0000 (GMT) Received: from alpha.tao.org.uk ([212.42.1.232]) by localhost (mail.tao.org.uk [212.42.1.232]) (amavisd-maia, port 10024) with LMTP id 84573-02; Fri, 4 Mar 2011 14:11:24 +0000 (GMT) Received: from [90.155.77.76] (unknown [90.155.77.76]) (Authenticated sender: joemail@alpha.tao.org.uk) by alpha.tao.org.uk (Postfix) with ESMTPA id 526E01076C76; Fri, 4 Mar 2011 14:11:22 +0000 (GMT) Content-Type: text/plain; charset=us-ascii Mime-Version: 1.0 (Apple Message framework v1081) From: Dr Josef Karthauser Date: Fri, 4 Mar 2011 14:11:20 +0000 Content-Transfer-Encoding: quoted-printable Message-Id: <423DA028-1CDB-443F-B3F0-C610D6268484@tao.org.uk> References: To: freebsd-xen@freebsd.org X-Mailer: Apple Mail (2.1081) X-Virus-Scanned: Maia Mailguard 1.0.2a Subject: XEN i386 with PAE and zfs, trouble? X-BeenThere: freebsd-xen@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Discussion of the freebsd port to xen - implementation and usage List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 04 Mar 2011 14:27:20 -0000 Hey there, I've been asking these questions to the wrong list! Just found the xen = list, so I'll recap here. I want to run amd64 on xen, at a VPS hosting provider. Due to cost = constraints the sweet spot in the cost/memory ratio has given me a = provider who will only support a "ops_pv" kernel. This means that XENHVM = on amd64 is not available to me. The VPS provider will be giving me at least 6 gb of ram, and I want to = run ZFS on the instance. This leaves me considering running the i386 = kernel and relying on PAE to get access to the extra memory. I presume = that I'll lose about 1.5-2gb of RAM to ZFS tuning, and hope that means = that I'll have 4gb(-ish) available to userland processes. Is this a sensible assumption? Can I rely on this being a stable = configuration, or am I high?! :) Thanks, Joe