From owner-freebsd-stable@FreeBSD.ORG  Wed Jan 19 10:39:54 2011
Return-Path: <owner-freebsd-stable@FreeBSD.ORG>
Delivered-To: freebsd-stable@freebsd.org
Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34])
	by hub.freebsd.org (Postfix) with ESMTP id 018B9106564A
	for <freebsd-stable@freebsd.org>; Wed, 19 Jan 2011 10:39:54 +0000 (UTC)
	(envelope-from freebsd-stable@m.gmane.org)
Received: from lo.gmane.org (lo.gmane.org [80.91.229.12])
	by mx1.freebsd.org (Postfix) with ESMTP id AFA178FC0A
	for <freebsd-stable@freebsd.org>; Wed, 19 Jan 2011 10:39:53 +0000 (UTC)
Received: from list by lo.gmane.org with local (Exim 4.69)
	(envelope-from <freebsd-stable@m.gmane.org>) id 1PfVSC-0007Wc-AZ
	for freebsd-stable@freebsd.org; Wed, 19 Jan 2011 11:39:52 +0100
Received: from lara.cc.fer.hr ([161.53.72.113])
	by main.gmane.org with esmtp (Gmexim 0.1 (Debian))
	id 1AlnuQ-0007hv-00
	for <freebsd-stable@freebsd.org>; Wed, 19 Jan 2011 11:39:52 +0100
Received: from ivoras by lara.cc.fer.hr with local (Gmexim 0.1 (Debian))
	id 1AlnuQ-0007hv-00
	for <freebsd-stable@freebsd.org>; Wed, 19 Jan 2011 11:39:52 +0100
X-Injected-Via-Gmane: http://gmane.org/
To: freebsd-stable@freebsd.org
From: Ivan Voras <ivoras@freebsd.org>
Date: Wed, 19 Jan 2011 11:39:41 +0100
Lines: 27
Message-ID: <ih6f1d$u16$1@dough.gmane.org>
References: <4D36A2CF.1080508@fsn.hu> <20110119084648.GA28278@icarus.home.lan>
	<4D36B85B.8070201@fsn.hu>
Mime-Version: 1.0
Content-Type: text/plain; charset=UTF-8; format=flowed
Content-Transfer-Encoding: 7bit
X-Complaints-To: usenet@dough.gmane.org
X-Gmane-NNTP-Posting-Host: lara.cc.fer.hr
User-Agent: Mozilla/5.0 (X11; U; FreeBSD amd64; en-US;
	rv:1.9.2.12) Gecko/20101102 Thunderbird/3.1.6
In-Reply-To: <4D36B85B.8070201@fsn.hu>
X-Enigmail-Version: 1.1.2
Cc: freebsd-fs@freebsd.org
Subject: Re: tmpfs is zero bytes (no free space), maybe a zfs bug?
X-BeenThere: freebsd-stable@freebsd.org
X-Mailman-Version: 2.1.5
Precedence: list
List-Id: Production branch of FreeBSD source code <freebsd-stable.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-stable>, 
	<mailto:freebsd-stable-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/freebsd-stable>
List-Post: <mailto:freebsd-stable@freebsd.org>
List-Help: <mailto:freebsd-stable-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-stable>,
	<mailto:freebsd-stable-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Wed, 19 Jan 2011 10:39:54 -0000

On 19/01/2011 11:09, Attila Nagy wrote:
> On 01/19/11 09:46, Jeremy Chadwick wrote:
>> On Wed, Jan 19, 2011 at 09:37:35AM +0100, Attila Nagy wrote:
>>> I first noticed this problem on machines with more memory (32GB
>>> eg.), but now it happens on 4G machines too:
>>> tmpfs 0B 0B 0B
>>> 100% /tmp
>>> FreeBSD builder 8.2-PRERELEASE FreeBSD 8.2-PRERELEASE #0: Sat Jan 8
>>> 22:11:54 CET 2011
>>>
>>> Maybe it's related, that I use zfs on these machines...
>>>
>>> Sometimes it grows and shrinks, but generally there is no space even
>>> for a small file, or a socket to create.
>> http://lists.freebsd.org/pipermail/freebsd-stable/2011-January/060867.html
>>
>>
> Oh crap. :(
>
> I hope somebody can find the time to look into this, it's pretty
> annoying...

http://people.freebsd.org/~ivoras/diffs/tmpfs.h.patch

I don't think this is a complete solution but it's a start. If you can, 
try it and see if it helps.