From owner-freebsd-current@FreeBSD.ORG Mon Nov 28 07:48:34 2011 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 CE4F2106566B; Mon, 28 Nov 2011 07:48:34 +0000 (UTC) (envelope-from mm@FreeBSD.org) Received: from mail.vx.sk (mail.vx.sk [IPv6:2a01:4f8:150:6101::4]) by mx1.freebsd.org (Postfix) with ESMTP id 6AD238FC0C; Mon, 28 Nov 2011 07:48:34 +0000 (UTC) Received: from core.vx.sk (localhost [127.0.0.2]) by mail.vx.sk (Postfix) with ESMTP id 9ED3215C59; Mon, 28 Nov 2011 08:48:33 +0100 (CET) X-Virus-Scanned: amavisd-new at mail.vx.sk Received: from mail.vx.sk by core.vx.sk (amavisd-new, unix socket) with LMTP id REYqUcXXQMKW; Mon, 28 Nov 2011 08:48:31 +0100 (CET) Received: from [10.9.8.1] (188-167-78-15.dynamic.chello.sk [188.167.78.15]) by mail.vx.sk (Postfix) with ESMTPSA id 83CC615C52; Mon, 28 Nov 2011 08:48:29 +0100 (CET) Message-ID: <4ED33CCC.1050405@FreeBSD.org> Date: Mon, 28 Nov 2011 08:48:28 +0100 From: Martin Matuska User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:8.0) Gecko/20111105 Thunderbird/8.0 MIME-Version: 1.0 To: Mark Felder References: <95d00c1b714837aa32e7da72bc4afd03@feld.me> <20111126104840.GA8794@garage.freebsd.pl> <881f876f-6f27-49fd-b6c7-edbe6493ec75@email.android.com> <820791346f600ea50ff9ebd68e30c059@feld.me> In-Reply-To: <820791346f600ea50ff9ebd68e30c059@feld.me> X-Enigmail-Version: 1.3.3 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit Cc: freebsd-fs@freebsd.org, freebsd-current@freebsd.org Subject: Re: zfs i/o hangs on 9-PRERELEASE 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: Mon, 28 Nov 2011 07:48:34 -0000 On 28.11.2011 3:21, Mark Felder wrote: > After many hours of testing, reproducing, and testing again I've > finally been able to narrow down what the real issue is and it's not > ZFS as I suspected. After completely turning off all NFS functionality > and serving my files over Samba I haven't had a single issue. It seems > there is something going on with the new NFS code (I serve out over > v4, but reproduced it last week with v3) and my media player box, a > Popcorn Hour A-200 which is running Linux. If I can cobble some > hardware together and place it between so I can do some tcpdumps I > will provide that data so perhaps someone can understand what's going > on. If this is due to a badly behaving client this is potentially a > DoS on the server. > > > Regards, > > > > Mark Hi Mark, as to the output you have posted this seems to be a pf problem. Could you try the same situation with with pf(4) disabled? If you are not able to reproduce this hang with pf(4) disabled, it would be very nice to have a PR submitted. -- Martin Matuska FreeBSD committer http://blog.vx.sk