FreeBSD 6.2-RC2 Available - networking zoneli freeze problem still exist.

[LI Xin]

Bruce A. Mah wrote:
> 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/headless
>>>> 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 Peter
>>>> Holm have replicated it with his own tools so i have not bothered with
>>>> it until now. 
>>> 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.
>> 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.)?

The current workaround is that set the following in /boot/loader.conf:

kern.ipc.nmbclusters="0"

And reboot;  Note that this is not perfect as it can lead to the need of
increasing KVA space under certain load.

Cheers,
-- 
Xin LI <delphij at delphij.net>	http://www.delphij.net/
FreeBSD - The Power to Serve!

-------------- next part --------------
A non-text attachment was scrubbed...
Name: signature.asc
Type: application/pgp-signature
Size: 249 bytes
Desc: OpenPGP digital signature
Url : http://lists.freebsd.org/pipermail/freebsd-stable/attachments/20070109/64718931/signature.pgp