From owner-freebsd-stable@FreeBSD.ORG  Fri Jun  6 21:43:31 2008
Return-Path: <owner-freebsd-stable@FreeBSD.ORG>
Delivered-To: stable@freebsd.org
Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34])
	by hub.freebsd.org (Postfix) with ESMTP id 0198F1065677
	for <stable@freebsd.org>; Fri,  6 Jun 2008 21:43:31 +0000 (UTC)
	(envelope-from ericlin@tamama.org)
Received: from rv-out-0506.google.com (rv-out-0506.google.com [209.85.198.228])
	by mx1.freebsd.org (Postfix) with ESMTP id EAFDA8FC15
	for <stable@freebsd.org>; Fri,  6 Jun 2008 21:43:30 +0000 (UTC)
	(envelope-from ericlin@tamama.org)
Received: by rv-out-0506.google.com with SMTP id b25so1646673rvf.43
	for <stable@freebsd.org>; Fri, 06 Jun 2008 14:43:30 -0700 (PDT)
Received: by 10.140.248.17 with SMTP id v17mr396919rvh.9.1212788610655;
	Fri, 06 Jun 2008 14:43:30 -0700 (PDT)
Received: by 10.141.69.19 with HTTP; Fri, 6 Jun 2008 14:43:30 -0700 (PDT)
Message-ID: <47713ee10806061443v3e44576am2facb75df031f47e@mail.gmail.com>
Date: Sat, 7 Jun 2008 05:43:30 +0800
From: "Lin Jui-Nan Eric" <ericlin@tamama.org>
To: stable@freebsd.org
MIME-Version: 1.0
Content-Type: text/plain; charset=ISO-8859-1
Content-Transfer-Encoding: 7bit
Content-Disposition: inline
Cc: 
Subject: TMPFS: File System is Full
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: Fri, 06 Jun 2008 21:43:31 -0000

Hi,

I found when we exhaust memory, tmpfs will not be able to write
anything into it and cannot mount it.
I use ZFS and TMPFS at the same time.

Florence# cd /usr/src && make buildworld > /dev/null &
Florence# uname -a
FreeBSD Florence.tamama.org 7.0-RELEASE-p1 FreeBSD 7.0-RELEASE-p1 #5:
Mon May  5 00:36:32 CST 2008
root@Florence.tamama.org:/usr/obj/usr/src/sys/KERNEL  amd64
Florence# mount -t tmpfs -o rw,size=1024000 tmpfs /tmp/tmpfs
mount: tmpfs : No space left on device

first 5 lines of top:

last pid: 26893;  load averages:  1.50,  1.58,  1.48
    up 12+01:43:49  05:40:51
146 processes: 2 running, 144 sleeping
CPU states:     % user,     % nice,     % system,     % interrupt,     % idle
Mem: 406M Active, 574M Inact, 1775M Wired, 83M Cache, 214M Buf, 126M Free
Swap: 1024M Total, 1024M Free


I think there should be a "lower bound" size limit. Does TMPFS use
kernel-space memory?