From owner-freebsd-fs@FreeBSD.ORG Fri Jun 20 02:35:06 2014 Return-Path: Delivered-To: freebsd-fs@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:1900:2254:206a::19:1]) (using TLSv1 with cipher ADH-AES256-SHA (256/256 bits)) (No client certificate requested) by hub.freebsd.org (Postfix) with ESMTPS id B94B0BBF for ; Fri, 20 Jun 2014 02:35:06 +0000 (UTC) Received: from mail-qa0-x22f.google.com (mail-qa0-x22f.google.com [IPv6:2607:f8b0:400d:c00::22f]) (using TLSv1 with cipher ECDHE-RSA-RC4-SHA (128/128 bits)) (Client CN "smtp.gmail.com", Issuer "Google Internet Authority G2" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 741322646 for ; Fri, 20 Jun 2014 02:35:06 +0000 (UTC) Received: by mail-qa0-f47.google.com with SMTP id hw13so2698357qab.34 for ; Thu, 19 Jun 2014 19:35:05 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=3geeks.org; s=google; h=from:content-type:content-transfer-encoding:subject:message-id:date :to:mime-version; bh=h+N7ROw+uYM09RCn6A192ToNG39hSyRrJndkC6g8Wus=; b=OIy2e8HK59RfgBvbSO8LT0t5CNobyxdZQOIE4pYNTK6Gku1UqBwYkBUY2YRGaO3Bxl mRNISLsRgxn1HMVRFwrKXaks1JaXThJXMaIevpfuu0FOI6rm4OQ1qDA1MK/Fg4Rk8v9E SfXmBiXYgAlQTS+FLsCk3zweiImGi6YTXqbXA= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:from:content-type:content-transfer-encoding :subject:message-id:date:to:mime-version; bh=h+N7ROw+uYM09RCn6A192ToNG39hSyRrJndkC6g8Wus=; b=WI8Getzqje8/yubmDXaxqg+gILAjoGBOR9lAry7+AMkC7NENTdSzyINinFod6MZBmE LHnY88y7mjFmSMrTVFR0cZM+F4rDj5RShC45ETiMhhaygLLAVJZEqo+tnaZbkNfkGFAV q/bz1c3dYLsbdrgDhSpSLa1ei+94PZGFdXwcCPj7INJsV6RnSHEK5jTq9/2jLQrG3BFP cJr6mDsBVbe4cPEcOsY9iI5Rb+7i0f4xiW/oeAZ7bXZewSCAY4lMXwnY4yITx1ft+oBf FHOmlDxziHtfEj8uhB+PTtJ2os+ktxW1qc/FsNHA7XANblnudMH5qpnhvfoSRHqghfSd l6zQ== X-Gm-Message-State: ALoCoQlmQMnOdeBWNZIWbSCx7J6zVXaNCUF24Ll/I96z3EF2Wj7riOCm5uJnjKOk+1qqBwxUJVto X-Received: by 10.224.127.197 with SMTP id h5mr584833qas.3.1403231705262; Thu, 19 Jun 2014 19:35:05 -0700 (PDT) Received: from treehunter.3geeks.org (pool-108-28-189-172.washdc.fios.verizon.net. [108.28.189.172]) by mx.google.com with ESMTPSA id 22sm4396735qgs.23.2014.06.19.19.35.02 for (version=TLSv1 cipher=ECDHE-RSA-RC4-SHA bits=128/128); Thu, 19 Jun 2014 19:35:03 -0700 (PDT) From: Daniel Mayfield Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: quoted-printable Subject: Debugging newnfs Message-Id: <0016EC7C-7DCC-47B4-AD12-798525045F89@3geeks.org> Date: Thu, 19 Jun 2014 22:35:01 -0400 To: freebsd-fs@freebsd.org Mime-Version: 1.0 (Mac OS X Mail 7.3 \(1878.2\)) X-Mailer: Apple Mail (2.1878.2) X-BeenThere: freebsd-fs@freebsd.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: Filesystems List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 20 Jun 2014 02:35:06 -0000 I have a very strange problem between an NFS server running FreeBSD 10 = w/ ZFS and a number of FreeBSD 10 VMs running on a XenServer 6.2 SP1 = host. The problem manifests as seemingly random permissions issues = and/or IO errors on the clients when the ZFS pool is busy. There are no = entries in dmesg on either side, and no errors logged in nfsstat either. = If I keep the traffic down, the errors subside, but not completely. = Other than tcpdump, how can I go about debugging this? Dan=