From owner-freebsd-fs@FreeBSD.ORG Fri Nov 29 21:40:03 2013 Return-Path: Delivered-To: freebsd-fs@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:1900:2254:206a::19:1]) (using TLSv1 with cipher ADH-AES256-SHA (256/256 bits)) (No client certificate requested) by hub.freebsd.org (Postfix) with ESMTPS id 3E833B4A for ; Fri, 29 Nov 2013 21:40:03 +0000 (UTC) Received: from sam.nabble.com (sam.nabble.com [216.139.236.26]) (using TLSv1 with cipher AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.freebsd.org (Postfix) with ESMTPS id 1A87A10E8 for ; Fri, 29 Nov 2013 21:40:02 +0000 (UTC) Received: from [192.168.236.26] (helo=sam.nabble.com) by sam.nabble.com with esmtp (Exim 4.72) (envelope-from ) id 1VmVn2-0000fM-E5 for freebsd-fs@freebsd.org; Fri, 29 Nov 2013 13:39:56 -0800 Date: Fri, 29 Nov 2013 13:39:56 -0800 (PST) From: Beeblebrox To: freebsd-fs@freebsd.org Message-ID: <1385761196424-5864850.post@n5.nabble.com> In-Reply-To: References: <1380880223590-5848720.post@n5.nabble.com> <524EEE40.5060208@gmail.com> <1381060830753-5849397.post@n5.nabble.com> <20131006123350.GJ3287@sludge.elizium.za.net> <1381683172518-5851539.post@n5.nabble.com> <1385711723411-5864713.post@n5.nabble.com> Subject: Re: Questions re swap-on-zfs MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit X-BeenThere: freebsd-fs@freebsd.org X-Mailman-Version: 2.1.16 Precedence: list List-Id: Filesystems List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 29 Nov 2013 21:40:03 -0000 Thank you. Just to be nit-picking over the details, * A zpool dataset hosting swap may lock-up. * As work-around, we want to enable SSD-based 1G partition as fall-back swap (only last resort) * My system DOES suffer from lockups (when poudriere is compiling), but the spindle-HDD hosted zpool/swap is not why (swap space usage barely maxes at 15%). The lockup is probably due to CPU (unlocked core). * Does a /dev/gconcat device, (zpool first, SSD partition as number 2) function as designed (and I mean does the SSD partition work as fallback), if and should the primary swap on zpool/swap have a lockup for some reason. Difficult to call IMHO. Thanks again. ----- FreeBSD-11-current_amd64_root-on-zfs_RadeonKMS -- View this message in context: http://freebsd.1045724.n5.nabble.com/Questions-re-swap-on-zfs-tp5848720p5864850.html Sent from the freebsd-fs mailing list archive at Nabble.com.