From owner-freebsd-fs@FreeBSD.ORG Mon Oct 3 11:48:16 2011 Return-Path: Delivered-To: freebsd-fs@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id DC660106566B; Mon, 3 Oct 2011 11:48:16 +0000 (UTC) (envelope-from bra@fsn.hu) Received: from people.fsn.hu (people.fsn.hu [195.228.252.137]) by mx1.freebsd.org (Postfix) with ESMTP id EE7E78FC08; Mon, 3 Oct 2011 11:48:15 +0000 (UTC) Received: by people.fsn.hu (Postfix, from userid 1001) id DF6BEA8D868; Mon, 3 Oct 2011 13:29:19 +0200 (CEST) X-Bogosity: Ham, tests=bogofilter, spamicity=0.000001, version=1.2.2 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MF-ACE0E1EA [pR: 18.4129] X-CRM114-CacheID: sfid-20111003_13291_8FB976E7 X-CRM114-Status: Good ( pR: 18.4129 ) X-DSPAM-Result: Whitelisted X-DSPAM-Processed: Mon Oct 3 13:29:19 2011 X-DSPAM-Confidence: 0.9964 X-DSPAM-Probability: 0.0000 X-DSPAM-Signature: 4e899c8f617025446310241 X-DSPAM-Factors: 27, From*Attila Nagy , 0.00010, FreeBSD, 0.00054, FreeBSD, 0.00054, >+On, 0.00099, wrote+>, 0.00179, bug, 0.00198, On+Sat, 0.00219, On+Sat, 0.00219, wrote+>>, 0.00267, >+>, 0.00288, >+>, 0.00288, org>+wrote, 0.00292, References*mail.gmail.com>, 0.00295, References*mail.gmail.com>, 0.00295, >>+>>, 0.00409, root, 0.00454, wrote, 0.00495, wrote, 0.00495, 2011+at, 0.00532, 2011+at, 0.00532, STABLE, 0.00556, STABLE, 0.00556, /tmp, 0.00612, /tmp, 0.00612, FreeBSD+8, 0.00612, Filesystem, 0.00679, X-Spambayes-Classification: ham; 0.00 Received: from japan.t-online.private (japan.t-online.co.hu [195.228.243.99]) by people.fsn.hu (Postfix) with ESMTPSA id 0BA3EA8D85B; Mon, 3 Oct 2011 13:29:19 +0200 (CEST) Message-ID: <4E899C8E.7040305@fsn.hu> Date: Mon, 03 Oct 2011 13:29:18 +0200 From: Attila Nagy User-Agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.8.1.23) Gecko/20090817 Thunderbird/2.0.0.23 Mnenhy/0.7.6.0 MIME-Version: 1.0 To: Jeremy Chadwick References: <20111002020231.GA70864@icarus.home.lan> In-Reply-To: <20111002020231.GA70864@icarus.home.lan> X-Stationery: 0.7.5 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit X-Content-Filtered-By: Mailman/MimeDel 2.1.5 Cc: freebsd-fs@freebsd.org, delphij@freebsd.org, Adrian Chadd Subject: Re: is TMPFS still highly experimental? X-BeenThere: freebsd-fs@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Filesystems List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 03 Oct 2011 11:48:16 -0000 Hi, On 10/02/11 04:02, Jeremy Chadwick wrote: > On Sat, Oct 01, 2011 at 06:02:39PM -0700, Xin LI wrote: >> On Sat, Oct 1, 2011 at 8:48 AM, Chris Rees wrote: >>> I've also not heard of anyone using it with zfs successfully- it tends to >>> shrink rapidly. >> I'm quite surprised with this assertion. I use tmpfs on my own system >> and I never see such problem as long as one have sufficient swap >> space. >> >> Not to say there is no problem --there is no way to say "commit this >> amount of memory to ZFS" but really I have never hit this exact >> alleged problem... > Its been reported multiple times by multiple people, and there has been > no official word on -fs, -stable, or zfs-devel that this specific > problem has been fixed: > > * miyamoto moesasji > - 2011/01/01 > - 8.2-PRERELEASE (thus RELENG_8) > - World/kernel build date unknown > - http://lists.freebsd.org/pipermail/freebsd-stable/2011-January/060850.html > - http://lists.freebsd.org/pipermail/freebsd-stable/2011-January/060852.html > - http://lists.freebsd.org/pipermail/freebsd-stable/2011-January/060860.html > - http://lists.freebsd.org/pipermail/freebsd-stable/2011-January/060861.html > - Statement from Ivan Voras that it's a known problem: > - http://lists.freebsd.org/pipermail/freebsd-stable/2011-January/060867.html > > * Atilla Nagy > - 2011/01/19 > - 8.2-PRERELEASE (thus RELENG_8) > - World/kernel build date of 2011/01/08 > - http://lists.freebsd.org/pipermail/freebsd-fs/2011-January/010496.html > - http://lists.freebsd.org/pipermail/freebsd-fs/2011-January/010497.html > - http://lists.freebsd.org/pipermail/freebsd-fs/2011-January/010498.html > - http://lists.freebsd.org/pipermail/freebsd-fs/2011-January/010499.html > - http://lists.freebsd.org/pipermail/freebsd-fs/2011-January/010501.html > - http://lists.freebsd.org/pipermail/freebsd-fs/2011-January/010569.html > - Ivan Voras mentions a thread he started on -CURRENT circa 2010/11/21 > about this problem: > http://www.mail-archive.com/freebsd-current@freebsd.org/msg126491.html > For me, the bug is still here: $ uname -a FreeBSD b 8.2-STABLE FreeBSD 8.2-STABLE #5: Wed Sep 14 15:01:25 CEST 2011 root@buildervm:/data/usr/obj/data/usr/src/sys/BOOTCLNT amd64 $ df -h /tmp Filesystem Size Used Avail Capacity Mounted on tmpfs 0B 0B 0B 100% /tmp I have no swap configured. The machine has 64 GB RAM. vm.kmem_size=60G; vfs.zfs.arc_max=55G; vfs.zfs.arc_min=20G