From owner-freebsd-bugs@FreeBSD.ORG  Sat Dec  3 13:40:04 2011
Return-Path: <owner-freebsd-bugs@FreeBSD.ORG>
Delivered-To: freebsd-bugs@hub.freebsd.org
Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34])
	by hub.freebsd.org (Postfix) with ESMTP id 8D21C106564A
	for <freebsd-bugs@hub.freebsd.org>;
	Sat,  3 Dec 2011 13:40:04 +0000 (UTC)
	(envelope-from gnats@FreeBSD.org)
Received: from freefall.freebsd.org (freefall.freebsd.org
	[IPv6:2001:4f8:fff6::28])
	by mx1.freebsd.org (Postfix) with ESMTP id 4CC0F8FC14
	for <freebsd-bugs@hub.freebsd.org>;
	Sat,  3 Dec 2011 13:40:04 +0000 (UTC)
Received: from freefall.freebsd.org (localhost [127.0.0.1])
	by freefall.freebsd.org (8.14.5/8.14.5) with ESMTP id pB3De4JN083802
	for <freebsd-bugs@freefall.freebsd.org>; Sat, 3 Dec 2011 13:40:04 GMT
	(envelope-from gnats@freefall.freebsd.org)
Received: (from gnats@localhost)
	by freefall.freebsd.org (8.14.5/8.14.5/Submit) id pB3De4xs083801;
	Sat, 3 Dec 2011 13:40:04 GMT (envelope-from gnats)
Resent-Date: Sat, 3 Dec 2011 13:40:04 GMT
Resent-Message-Id: <201112031340.pB3De4xs083801@freefall.freebsd.org>
Resent-From: FreeBSD-gnats-submit@FreeBSD.org (GNATS Filer)
Resent-To: freebsd-bugs@FreeBSD.org
Resent-Reply-To: FreeBSD-gnats-submit@FreeBSD.org,
	Eugen Konkov <kes-kes@yandex.ru>
Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34])
	by hub.freebsd.org (Postfix) with ESMTP id 27DE0106564A
	for <freebsd-gnats-submit@FreeBSD.org>;
	Sat,  3 Dec 2011 13:31:08 +0000 (UTC)
	(envelope-from nobody@FreeBSD.org)
Received: from red.freebsd.org (red.freebsd.org [IPv6:2001:4f8:fff6::22])
	by mx1.freebsd.org (Postfix) with ESMTP id 17E268FC08
	for <freebsd-gnats-submit@FreeBSD.org>;
	Sat,  3 Dec 2011 13:31:08 +0000 (UTC)
Received: from red.freebsd.org (localhost [127.0.0.1])
	by red.freebsd.org (8.14.4/8.14.4) with ESMTP id pB3DV7Hw040349
	for <freebsd-gnats-submit@FreeBSD.org>; Sat, 3 Dec 2011 13:31:07 GMT
	(envelope-from nobody@red.freebsd.org)
Received: (from nobody@localhost)
	by red.freebsd.org (8.14.4/8.14.4/Submit) id pB3DV7qe040330;
	Sat, 3 Dec 2011 13:31:07 GMT (envelope-from nobody)
Message-Id: <201112031331.pB3DV7qe040330@red.freebsd.org>
Date: Sat, 3 Dec 2011 13:31:07 GMT
From: Eugen Konkov <kes-kes@yandex.ru>
To: freebsd-gnats-submit@FreeBSD.org
X-Send-Pr-Version: www-3.1
Cc: 
Subject: misc/163038: can not connect through ssh to server when /usr is
	100% busy
X-BeenThere: freebsd-bugs@freebsd.org
X-Mailman-Version: 2.1.5
Precedence: list
List-Id: Bug reports <freebsd-bugs.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-bugs>,
	<mailto:freebsd-bugs-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/freebsd-bugs>
List-Post: <mailto:freebsd-bugs@freebsd.org>
List-Help: <mailto:freebsd-bugs-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-bugs>,
	<mailto:freebsd-bugs-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Sat, 03 Dec 2011 13:40:04 -0000


>Number:         163038
>Category:       misc
>Synopsis:       can not connect through ssh to server when /usr is 100% busy
>Confidential:   no
>Severity:       serious
>Priority:       high
>Responsible:    freebsd-bugs
>State:          open
>Quarter:        
>Keywords:       
>Date-Required:
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Sat Dec 03 13:40:03 UTC 2011
>Closed-Date:
>Last-Modified:
>Originator:     Eugen Konkov
>Release:        9
>Organization:
ISP FreeLine
>Environment:
FreeBSD flux 9.0-CURRENT FreeBSD 9.0-CURRENT #4: Fri Jun 10 01:30:12 UTC 2011     :/usr/obj/usr/src/sys/PAE_KES  i386

>Description:
when hard drive is 100% busy and I/O operations on /usr slice
you can not connect to system until IO complete

dump -0L -f - /usr | gzip -2 | ssh -c blowfish u@u dd of=/usr/sharedzone/snap/dump-usr.gz

df -h
/dev/ad0s1f    1.8T     21G    1.6T     1%    /usr

It seems that dump lock slice while doing snapshot

tty also locked if I try to 'cd to /usr/.snap'
>How-To-Repeat:

>Fix:


>Release-Note:
>Audit-Trail:
>Unformatted: