From owner-freebsd-fs@FreeBSD.ORG Sun Oct 2 06:41:01 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 8DE01106564A; Sun, 2 Oct 2011 06:41:01 +0000 (UTC) (envelope-from utisoft@gmail.com) Received: from mail-iy0-f182.google.com (mail-iy0-f182.google.com [209.85.210.182]) by mx1.freebsd.org (Postfix) with ESMTP id F0FEA8FC0C; Sun, 2 Oct 2011 06:41:00 +0000 (UTC) Received: by iadk27 with SMTP id k27so5409230iad.13 for ; Sat, 01 Oct 2011 23:41:00 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=mime-version:sender:in-reply-to:references:date :x-google-sender-auth:message-id:subject:from:to:cc:content-type; bh=rnnF3kACPL3mamDOLTbDZL3yGFm2iaeL6Hb51uCP91I=; b=RuOm18CoKxbyRZjwT2nuzdY/HQXkVjnEWWy/FkYEubgd91CPfpPEFWPbDjIZBWJje5 uXv/XQR1xr3Q2TyPyA8bLbZRSXI7ZoewN7aojnUwwGtKk3lazHNTif3SVvKf14gVgbPK MUMLf3FOgQMZEiMv/ppvmNYpzIN7QxYuWTez4= MIME-Version: 1.0 Received: by 10.231.65.73 with SMTP id h9mr8050327ibi.21.1317537660349; Sat, 01 Oct 2011 23:41:00 -0700 (PDT) Sender: utisoft@gmail.com Received: by 10.231.35.194 with HTTP; Sat, 1 Oct 2011 23:41:00 -0700 (PDT) Received: by 10.231.35.194 with HTTP; Sat, 1 Oct 2011 23:41:00 -0700 (PDT) In-Reply-To: <20111002020231.GA70864@icarus.home.lan> References: <20111002020231.GA70864@icarus.home.lan> Date: Sun, 2 Oct 2011 07:41:00 +0100 X-Google-Sender-Auth: LXFxCzb8B4vvzSgGEdqkf4PX_GE Message-ID: From: Chris Rees To: Jeremy Chadwick Content-Type: text/plain; charset=ISO-8859-1 X-Content-Filtered-By: Mailman/MimeDel 2.1.5 Cc: freebsd-fs@freebsd.org, Adrian Chadd , delphij@freebsd.org 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: Sun, 02 Oct 2011 06:41:01 -0000 On 2 Oct 2011 03:03, "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 > > * Michael Loftis > - 2009/12/08 > - FreeBSD 8.0-RELEASE (RELENG_8_0) > - World/kernel build date of 2009/11/21 > - Might be a different problem altogether, but tmpfs is explicitly > mentioned in the fix/commit text from avg@ > - http://www.freebsd.org/cgi/query-pr.cgi?pr=kern/141305 > > Plus Chris Rees' report. So that makes 3, possibly 4 if you consider > the PR from Michael Loftis. > > Possibly it has something to do with the exact FreeBSD version they're > using. Not just version (e.g. 8.2-RELEASE vs. 8.2-STABLE), but also > kernel/world build date -- because as we've established, ZFS changes are > happening all the time and there is very little transparency when it > comes to communicating these changes to the community. > > Maybe the problem has been fixed in RELENG_8 sometime after 2011/01/08, > but we do not know. ZFS committers would need to help. Else, folks > should be reaching out to the first two people I mentioned above and > asking if they can reproduce the problem on present-day RELENG_8. > Thanks hugely for doing the linking and research I should have done-- I've not personally had these problems but I recalled the recent conversation, that's all. Chris