From owner-freebsd-current@FreeBSD.ORG Sat Nov 3 18:38:33 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 ABBF416A469 for ; Sat, 3 Nov 2007 18:38:33 +0000 (UTC) (envelope-from davidt@yadt.co.uk) Received: from outcold.yadt.co.uk (outcold.yadt.co.uk [81.187.204.178]) by mx1.freebsd.org (Postfix) with ESMTP id 5B32913C4B5 for ; Sat, 3 Nov 2007 18:38:33 +0000 (UTC) (envelope-from davidt@yadt.co.uk) Received: from localhost (localhost [127.0.0.1]) by outcold.yadt.co.uk (Postfix) with ESMTP id E50FF6708 for ; Sat, 3 Nov 2007 16:42:34 +0000 (GMT) X-Virus-Scanned: amavisd-new at yadt.co.uk Received: from outcold.yadt.co.uk ([127.0.0.1]) by localhost (outcold.yadt.co.uk [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id 3Q9x1cticLyE for ; Sat, 3 Nov 2007 16:42:31 +0000 (GMT) Received: by outcold.yadt.co.uk (Postfix, from userid 1001) id 8DC286700; Sat, 3 Nov 2007 16:42:31 +0000 (GMT) Date: Sat, 3 Nov 2007 16:42:31 +0000 From: David Taylor To: freebsd-current@freebsd.org Message-ID: <20071103164231.GB23714@outcold.yadt.co.uk> Mail-Followup-To: freebsd-current@freebsd.org References: <200711021208.25913.Thomas.Sparrevohn@btinternet.com> Mime-Version: 1.0 Content-Type: text/plain; charset=iso-8859-15 Content-Disposition: inline In-Reply-To: <200711021208.25913.Thomas.Sparrevohn@btinternet.com> User-Agent: Mutt/1.4.2.3i 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: Sat, 03 Nov 2007 18:38:33 -0000 On Fri, 02 Nov 2007, Thomas Sparrevohn wrote: > > Hi > > One of the recent changes (after 28/10) has started making CURRENT hang in a wait state called zfs:(&zio->io_cv) - As the machine just has been rebuild > I cannot narrow it down any more than that I have seen a number of processes appear to hang in that state. For example, pkg_delete seems to be _extremely_ slow and ^T reports that it is stuck waiting on zfs:(&zio->io_cv) for an unreasonable (IMO) amount of time. I may once have been forced to reboot the system due to this problem "spreading" to other processes, but I had no time nor ability to investigate it further, so I'm not even sure it was the same problem. -- David Taylor