From owner-freebsd-stable@FreeBSD.ORG Tue Feb 7 19:53:14 2012 Return-Path: Delivered-To: stable@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 1CE801065674 for ; Tue, 7 Feb 2012 19:53:14 +0000 (UTC) (envelope-from peter@pean.org) Received: from system.jails.se (system.jails.se [IPv6:2001:16d8:cc1e:1::1]) by mx1.freebsd.org (Postfix) with ESMTP id BA2F68FC0A for ; Tue, 7 Feb 2012 19:53:13 +0000 (UTC) Received: from localhost (system.jails.se [91.205.63.85]) by system.jails.se (Postfix) with SMTP id 630346A2BF for ; Tue, 7 Feb 2012 20:53:11 +0100 (CET) Received: from [172.20.10.4] (c-5eeaaa37-74736162.cust.telenor.se [94.234.170.55]) (using TLSv1 with cipher AES128-SHA (128/128 bits)) (No client certificate requested) by system.jails.se (Postfix) with ESMTPSA id 981C56A2B8; Tue, 7 Feb 2012 20:53:09 +0100 (CET) Mime-Version: 1.0 (Apple Message framework v1251.1) Content-Type: text/plain; charset=iso-8859-1 From: =?iso-8859-1?Q?Peter_Ankerst=E5l?= In-Reply-To: <99FFD8AE-F4E0-4BD9-92BC-45D8C8A31383@punkt.de> Date: Tue, 7 Feb 2012 20:53:08 +0100 Content-Transfer-Encoding: quoted-printable Message-Id: References: <99FFD8AE-F4E0-4BD9-92BC-45D8C8A31383@punkt.de> To: Patrick M. Hausen X-Mailer: Apple Mail (2.1251.1) X-DSPAM-Result: Innocent X-DSPAM-Processed: Tue Feb 7 20:53:11 2012 X-DSPAM-Confidence: 1.0000 X-DSPAM-Probability: 0.0023 X-DSPAM-Signature: 4f31812726811036549374 X-DSPAM-Factors: 27, Received*cipher+AES128, 0.40000, just, 0.40000, system+>, 0.40000, a+HUGE, 0.40000, AM, 0.40000, Mime-Version*Message, 0.40000, all+>, 0.40000, ZFS+guides, 0.40000, swap+is, 0.40000, "freebsd, 0.40000, or, 0.40000, or, 0.40000, Received*Tue, 0.40000, http+//lists, 0.40000, any+hints, 0.40000, org, 0.40000, from, 0.40000, be+the, 0.40000, of, 0.40000, of, 0.40000, M+Hausen, 0.40000, running+out, 0.40000, when+the, 0.40000, Received*2012, 0.40000, zvol+>, 0.40000, cause, 0.40000, swap+on, 0.40000 Cc: stable@freebsd.org Subject: Re: Swap on zvol - recommendable? 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, 07 Feb 2012 19:53:14 -0000 I can just tell you I had this problem still in 8.1 and it was a HUGE = problem.=20 System stalled every two weeks or so. Now when the swap is moved away = from zfs it works fine. On Feb 6, 2012, at 11:57 AM, Patrick M. Hausen wrote: > Hi, all, >=20 > is it possible to make a definite statement about swap on zvols? >=20 > I found some older discussions about a resource starvation > scenario when ZFS arc would be the cause of the system > running out of memory, trying to swap, yet the ZFS would > not be accessible until some memory was freed - leading to > a deadlock. >=20 > Is this still the case with RELENG_8? The various Root on > ZFS guides mention both choices (decicated or gmirror > partition vs. zvol), yet don't say anything about the respective > merits or risks. I am aware of the fact that I cannot dump to > a raidz2 zvol ... >=20 > Thanks for any hints, > Patrick > --=20 > punkt.de GmbH * Kaiserallee 13a * 76133 Karlsruhe > Tel. 0721 9109 0 * Fax 0721 9109 100 > info@punkt.de http://www.punkt.de > Gf: J=FCrgen Egeling AG Mannheim 108285 >=20 >=20 >=20 > _______________________________________________ > freebsd-stable@freebsd.org mailing list > http://lists.freebsd.org/mailman/listinfo/freebsd-stable > To unsubscribe, send any mail to = "freebsd-stable-unsubscribe@freebsd.org" >=20