Date: Mon, 03 Oct 2011 13:29:18 +0200 From: Attila Nagy <bra@fsn.hu> To: Jeremy Chadwick <freebsd@jdc.parodius.com> Cc: freebsd-fs@freebsd.org, delphij@freebsd.org, Adrian Chadd <adrian@freebsd.org> Subject: Re: is TMPFS still highly experimental? Message-ID: <4E899C8E.7040305@fsn.hu> In-Reply-To: <20111002020231.GA70864@icarus.home.lan> References: <CAOfDtXMm9K_fbOmvG2gvXxDfKakkgpPt9MLifqDxa4wCibMExg@mail.gmail.com> <alpine.GSO.1.10.1110011122030.882@multics.mit.edu> <CADLo83-s_3H8PbbxOPPxbe0m10U0U5JW-feB294dFs%2BQ3iTWvg@mail.gmail.com> <CAGMYy3ssi%2BkAuufDTHA1z6u7jRrZwRRkCCkcO94GHNGF9Rku_w@mail.gmail.com> <20111002020231.GA70864@icarus.home.lan>
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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<crees@freebsd.org> 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
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