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Date:      Tue, 09 Jan 2007 07:57:02 -0800
From:      "Bruce A. Mah" <bmah@freebsd.org>
To:        LI Xin <delphij@delphij.net>
Cc:        peter@holm.cc, Thomas Herrlin <junics-fbsdstable@atlantis.maniacs.se>, Ken Smith <kensmith@cse.Buffalo.EDU>, freebsd-stable@freebsd.org
Subject:   Re: FreeBSD 6.2-RC2 Available - networking zoneli freeze problem still exist.
Message-ID:  <45A3BB4E.3@freebsd.org>
In-Reply-To: <4593E790.8080509@delphij.net>
References:  <1167247246.96863.23.camel@opus.cse.buffalo.edu>	<4593DC34.2030308@atlantis.maniacs.se>	<1167320870.52842.20.camel@opus.cse.buffalo.edu> <4593E790.8080509@delphij.net>

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If memory serves me right, LI Xin wrote:
> Ken Smith wrote:
>> On Thu, 2006-12-28 at 16:01 +0100, Thomas Herrlin wrote:
>>> It still runs networking daemons into a frozen zoneli state on
>>> heavy/(D)DOS network loads. Such processes cant be kill-9ed so there =
is
>>> no way to recover from it. (think frozen sshd and a very remote/headl=
ess
>>> server).
>>> See the stress test panic called 'Ran out of "128 Bucket"
>>> <http://people.FreeBSD.org/%7Epho/stress/log/cons210.html>' on the 6.=
2
>>> todo list and my own latest test here:
>>> http://www.maniacs.se/~junics/temp/vmstat-z.txt
>>> This test was on a new 6.2-RC2 install with no zone limit tweaks nor =
any
>>> sbsize limits in /etc/login.conf.
>>> I just made a vm disk image with replication instructions, however Pe=
ter
>>> Holm have replicated it with his own tools so i have not bothered wit=
h
>>> it until now.=20
>> That problem is being worked on but won't be fixed for 6.2-REL.
>> Depending on how complex the fix winds up being it may be an Errata
>> candidate when the time comes.
>=20
> Perhaps we should mention some known workarounds in the errata
> documentation.  E.g. raising nmbclusters limit, etc.?

That's a good idea.  Do you have more specifics (e.g. any particular
nmbclusters value, other workarounds, etc.)?

Thanks,

Bruce.


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