From owner-freebsd-current@FreeBSD.ORG Sun Nov 4 14:24:22 2007 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 F34CD16A41A for ; Sun, 4 Nov 2007 14:24:21 +0000 (UTC) (envelope-from Thomas.Sparrevohn@btinternet.com) Received: from smtp812.mail.ird.yahoo.com (smtp812.mail.ird.yahoo.com [217.146.188.72]) by mx1.freebsd.org (Postfix) with SMTP id 6673813C48A for ; Sun, 4 Nov 2007 14:24:21 +0000 (UTC) (envelope-from Thomas.Sparrevohn@btinternet.com) Received: (qmail 66440 invoked from network); 4 Nov 2007 14:23:55 -0000 DomainKey-Signature: a=rsa-sha1; q=dns; c=nofws; s=s1024; d=btinternet.com; h=Received:X-YMail-OSG:From:To:Subject:Date:User-Agent:Cc:References:In-Reply-To:MIME-Version:Content-Type:Content-Transfer-Encoding:Content-Disposition:Message-Id; b=6Zd26aEx40rFa7RJF5s3fSpahmVRsF4QCB/VM6G6CYJ4RvMnH2WKVcHHzccikI/f4wtC3SaGLLq+tPSQbRy6LYwwHmVSRgiGkzELdW14pYgZoDkb93KQo3heyZNn5bVEFuibtLILEJ+ZjfQSvrIkm/gJJxLjnot9ghYb/CL6AK0= ; Received: from unknown (HELO w2fzz0vc03.aah-go-on.com) (thomas.sparrevohn@btinternet.com@86.133.212.97 with login) by smtp812.mail.ird.yahoo.com with SMTP; 4 Nov 2007 14:23:55 -0000 X-YMail-OSG: 4ZYc25EVM1nQP1_rae2YvgGW52NK3k2ZvFKAcJKeZTkhWB26 From: Thomas Sparrevohn To: freebsd-current@freebsd.org Date: Sun, 4 Nov 2007 14:23:54 +0000 User-Agent: KMail/1.9.7 References: <200711021208.25913.Thomas.Sparrevohn@btinternet.com> <472D9B2A.5080900@FreeBSD.org> <200711041302.08877.peter.schuller@infidyne.com> In-Reply-To: <200711041302.08877.peter.schuller@infidyne.com> MIME-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit Content-Disposition: inline Message-Id: <200711041423.54336.Thomas.Sparrevohn@btinternet.com> Cc: Peter Schuller Subject: Re: ZFS Hangs 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, 04 Nov 2007 14:24:22 -0000 On Sunday 04 November 2007 12:02:08 Peter Schuller wrote: > > It certainly could be a caching effect but the particular problem you > > were seeing should have been fixed. Are you still seeing it? > > I am not still seeing it; the machine has since been switched to AMD 64, and > RAM increased from 1 GB to 3 GB (and FreeBSD itself upgraded several times > since then). I did not look into it in terrible detail; I just observed by > tracing that the I/O in question was definitely the package database, and > that it was definitely accessing the same files mutiple times. I assumed it > was a caching effect at the time, given all the maxvnode tweaking and sizing > restrictions put on the ARC. I do know I never saw it after the memory > increase. > > Also, this might have been prior to disabling prefetch. If it was, perhaps the > prefetch hosed the cache. (Are the prefetch issues still there, anyone?) > Hmm. I seeing the hang now - but had not been seeing it before as I had increased the arc cache size - seems a very low arc_max - its about 300MB on a 4GB amd64 system However ZFS haning in "zfs:(&zio_cv_io)" is new - I have been running this system using ZFS for month without any trouble - The only change I can think of is that the devices has been changes to ATA RAID 0+1 apart from that everything worked before the 28/10-2007 - that when I installed the extra disks to change from RAID 0 - to RAID 0+1 -