From owner-freebsd-hackers@FreeBSD.ORG  Wed Oct  3 11:23:40 2012
Return-Path: <owner-freebsd-hackers@FreeBSD.ORG>
Delivered-To: freebsd-hackers@freebsd.org
Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34])
	by hub.freebsd.org (Postfix) with ESMTP id 2BD0E1065672
	for <freebsd-hackers@freebsd.org>; Wed,  3 Oct 2012 11:23:40 +0000 (UTC)
	(envelope-from ramquick@gmail.com)
Received: from mail-ee0-f54.google.com (mail-ee0-f54.google.com [74.125.83.54])
	by mx1.freebsd.org (Postfix) with ESMTP id B32F78FC15
	for <freebsd-hackers@freebsd.org>; Wed,  3 Oct 2012 11:23:39 +0000 (UTC)
Received: by eekc50 with SMTP id c50so4168331eek.13
	for <freebsd-hackers@freebsd.org>; Wed, 03 Oct 2012 04:23:33 -0700 (PDT)
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113;
	h=mime-version:reply-to:date:message-id:subject:from:to:content-type;
	bh=kHSynCOu98vNI3TA7r+Ijzpnmca2P6p+zmH8SJKweA4=;
	b=Se3TiaoG03erdQoJXtiS7gNO+V3UA5IADEOIr1sDNNiIOlN7WbI3g7ah2H0Vpj3YLc
	8Bv9FqojVJ39w4gAmaQrXKfLqMXJilgp06dL1KiivalzVqxuSnLa8tiPZC0j2nu+4QNk
	Qd0LzgjlRVRyX2H5ZcPr7VNW45xhZLp6wOn9fVv5EoW5XTpPpIB/NIvkVUqVOGhLM8zT
	XM3Jp1NrzoAqq1KDGv0wl4dljxPMGbOAW74wYvZv/j5WdfKMoq8rTjwI8vn+PPeXRUW8
	Z6JjANfjpz7jNFlrR2RhEiLAmSDQ8fWZGmdrvNJ0/7r5hV2qZEoSroE71SKYwlXQfEEI
	TszQ==
MIME-Version: 1.0
Received: by 10.14.209.5 with SMTP id r5mr2149103eeo.28.1349263413556; Wed, 03
	Oct 2012 04:23:33 -0700 (PDT)
Received: by 10.14.198.4 with HTTP; Wed, 3 Oct 2012 04:23:33 -0700 (PDT)
Date: Wed, 3 Oct 2012 16:53:33 +0530
Message-ID: <CAMRGQbNX7ZiZhD0tp9k6a2pfE9EnzPPw+yuegt8vJ250GdzU3w@mail.gmail.com>
From: Ram Chander <ramquick@gmail.com>
To: freebsd-hackers@freebsd.org
Content-Type: text/plain; charset=ISO-8859-1
X-Content-Filtered-By: Mailman/MimeDel 2.1.5
Subject: Zfs import issue
X-BeenThere: freebsd-hackers@freebsd.org
X-Mailman-Version: 2.1.5
Precedence: list
Reply-To: ram_chander250@yahoo.com
List-Id: Technical Discussions relating to FreeBSD
	<freebsd-hackers.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-hackers>, 
	<mailto:freebsd-hackers-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/freebsd-hackers>
List-Post: <mailto:freebsd-hackers@freebsd.org>
List-Help: <mailto:freebsd-hackers-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-hackers>,
	<mailto:freebsd-hackers-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Wed, 03 Oct 2012 11:23:40 -0000

Hi,

 I am importing zfs snapshot to freebsd-9 from anther host running
freebsd-9.  When the import happens, it locks the filesystem, "df" hangs
and unable to use the filesystem. Once the import completes, the filesystem
is back to normal and read/write works fine.  The same doesnt happen in
Solaris/OpenIndiana.

# uname -an
FreeBSD hostname 9.0-RELEASE FreeBSD 9.0-RELEASE #0: Tue Jan  3 07:46:30
UTC 2012     root@farrell.cse.buffalo.edu:/usr/obj/usr/src/sys/GENERIC
amd64

Zfs ver: 28


Any inputs would be helpful. Is there any way to overcome this freeze ?


Regards,
Ram