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Date:      Mon, 3 Oct 2011 15:13:42 -0700
From:      Xin LI <delphij@gmail.com>
To:        Olivier Smedts <olivier@gid0.org>
Cc:        "freebsd-fs@freebsd.org" <freebsd-fs@freebsd.org>, Ivan Voras <ivoras@freebsd.org>
Subject:   Re: is TMPFS still highly experimental?
Message-ID:  <CAGMYy3s7RrP8oWC%2BJYgSG3hU1EXgKmnf%2BWQRiE2CDu4bHuz3UA@mail.gmail.com>
In-Reply-To: <CABzXLYNLhP%2BYFvT5Sw=hKVF6d_Yvmt%2Be_QjH7ghX-2MyzS0wWA@mail.gmail.com>
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> <CAGMYy3sCCxOiVqeP4PVbvxnpcyoyQZoL%2Bw3nY8STYnpUNfj6JQ@mail.gmail.com> <j6aorc$hf0$1@dough.gmane.org> <CAGMYy3tbMWU6JU1%2B%2B5XmzjZTrV1=oAgRaaDE3-=MMT73F_ojQQ@mail.gmail.com> <CABzXLYNLhP%2BYFvT5Sw=hKVF6d_Yvmt%2Be_QjH7ghX-2MyzS0wWA@mail.gmail.com>

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On Mon, Oct 3, 2011 at 2:36 PM, Olivier Smedts <olivier@gid0.org> wrote:
[...]
> Try reducing the swap size to less than the RAM size. No "configuration
> issue", try with some RAM + swap that should fit all.

But it's not ZFS+tmpfs specific, it can happen anywhere when memory
and swap is not sufficient.  Of course tmpfs and ZFS should play more
well together but it's pretty much a "you get what you paid for"
situation IMHO.

One thing I can not yet reproduce, but sounds like a serious issue is
that when system have sufficient RAM available, ZFS reports 0 in free
space...  If there is a test case for that then that's definitely
something we need to solve sooner.

Cheers,
-- 
Xin LI <delphij@delphij.net> https://www.delphij.net/
FreeBSD - The Power to Serve! Live free or die



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