From owner-freebsd-current@FreeBSD.ORG Sun Jan 6 14:51:06 2008 Return-Path: Delivered-To: freebsd-current@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 953ED16A469 for ; Sun, 6 Jan 2008 14:51:06 +0000 (UTC) (envelope-from ivoras@gmail.com) Received: from rv-out-0910.google.com (rv-out-0910.google.com [209.85.198.188]) by mx1.freebsd.org (Postfix) with ESMTP id 682EA13C45A for ; Sun, 6 Jan 2008 14:51:06 +0000 (UTC) (envelope-from ivoras@gmail.com) Received: by rv-out-0910.google.com with SMTP id l15so7312222rvb.43 for ; Sun, 06 Jan 2008 06:51:06 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=domainkey-signature:received:received:message-id:date:from:sender:to:subject:cc:in-reply-to:mime-version:content-type:content-transfer-encoding:content-disposition:references:x-google-sender-auth; bh=mYFTaSd9TitXM0YfAOjSauk3dDQx7TBh1aPM+PGTKFs=; b=F5HjgJTECqDKlZk49YLlLQkiEz791+cL+VLmkUBMffwL6edNwQVaVSgDU1aq2mytw3RXMu7GOfniea7aNvdc99z3jP8q5UGmxERpMomA0QopKAjTLNExNC6osuEKLVsFiXe71tzRDXEkmk6YA2awhU9/Vf4IB+2w7DGRiOXbP8E= DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=message-id:date:from:sender:to:subject:cc:in-reply-to:mime-version:content-type:content-transfer-encoding:content-disposition:references:x-google-sender-auth; b=n1saDmBCS3dNJ0FvI6KMPKImoZx1tJUbBBke91vc7VTBksblXyVxhDd2CoVPLpS32PY6tCzIB2NbiZ025IYAxCKmtWM4FeqRKodbch+WUOXnvPmXsiK/6dRStHMp4TO+l8gjJrN3ZnTJHtO44yDb3RdvvavHUtuhujh1QD9Imyw= Received: by 10.141.50.17 with SMTP id c17mr9974330rvk.295.1199631066007; Sun, 06 Jan 2008 06:51:06 -0800 (PST) Received: by 10.141.212.1 with HTTP; Sun, 6 Jan 2008 06:51:05 -0800 (PST) Message-ID: <9bbcef730801060651y489f1f9bw269d0968407dd8fb@mail.gmail.com> Date: Sun, 6 Jan 2008 15:51:05 +0100 From: "Ivan Voras" Sender: ivoras@gmail.com To: "Kris Kennaway" In-Reply-To: <4780E546.9050303@FreeBSD.org> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit Content-Disposition: inline References: <20080104163352.GA42835@lor.one-eyed-alien.net> <9bbcef730801040958t36e48c9fjd0fbfabd49b08b97@mail.gmail.com> <200801061051.26817.peter.schuller@infidyne.com> <9bbcef730801060458k4bc9f2d6uc3f097d70e087b68@mail.gmail.com> <4780D289.7020509@FreeBSD.org> <4780E546.9050303@FreeBSD.org> X-Google-Sender-Auth: 4c88e74dcc71c0d1 Cc: freebsd-current@freebsd.org Subject: Re: When will ZFS become stable? X-BeenThere: freebsd-current@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Discussions about the use of FreeBSD-current List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sun, 06 Jan 2008 14:51:06 -0000 On 06/01/2008, Kris Kennaway wrote: > That's an assertion directly contradicted by my experience running a > heavily loaded 8-core i386 package builder. What is the IO profile of this usage? I'd guess that it's "short bursts of high activity (archive extraction, installing) followed by long periods of low activity (compiling)". From what I see on the lists and somewhat from my own experience, the problem appears more often when the load is more like "constant high r+w activity", probably with several users (applications) doing the activity in parallel. > Please explain in detail > the steps you have taken to tune your kernel. vm.kmem_size="512M" vm.kmem_size_max="512M" This should be enough for a 2 GB machine that does other things. > Do you have the vm_kern.c > patch applied? I can confirm that while it delays the panics, it doesn't eliminate them (this also seems to be the conclusion of several users that have tested it shortly after it's been posted). The fact that it's not committed is good enough indication that it's not The Answer. (And besides, asking users to apply non-committed patches just to run their systems normally is bad practice :) I can just imagine the Release Notes: "if you're using ZFS, you'll have to manually patch the kernel with this patch:..." :) This close to the -RELEASE, I judge the chances of it being committed are low).