IPv6 support by ISPs - current status? (was: Re: Links and some info about "IPv6 in Linux" lecture in Herzelinux yesterday)

2008-11-06 Thread Omer Zak
On Fri, 2008-11-07 at 01:14 +0200, Rami Rosen wrote:
> Hello,
> 
> As I promised, here are some links and some additional info about
> "IPv6 in Linux" lecture, which was given in Herzelinux yesterday
> (6.11.08) by me:
[... snipped ...]

Few subjects, which I understand were not covered by the lecture and
have great practical interest:

1. What is the status of IPv6 by your ISP, by your Web hosting service,
by your E-mail provider?
2. Is it feasible TODAY to switch all your home/office network and its
Internet connections to IPv6 and drop altogether any IPv4 use?  If not,
why?
3. What (if any) tunneling services are available if you want to access
IPv6-only resources in the open Internet?

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Links and some info about "IPv6 in Linux" lecture in Herzelinux yesterday (6.11.08)

2008-11-06 Thread Rami Rosen
Hello,

As I promised, here are some links and some additional info about
"IPv6 in Linux" lecture, which was given in Herzelinux yesterday
(6.11.08) by me:

1) The article about IPv6 I wrote, which was published in
linuxdevices two days ago, is here:
http://www.linuxdevices.com/articles/AT7843301253.html

2) Slides for today IPv6 lecture are available in tuxology web site are here:
http://tuxology.net/lectures/ipv6-in-the-linux-kernel/

3) Network namespaces and sysfs:
This issue was raised at the end of the lecture. For those who wonder
what is the tagged sysfs patch and what it has to do with network namespaces
and why it was dropped, here is a short explanation and links:

The problem with network namespaces is that when using some processes,
each with its own network stack (using network namespaces), it causes
a problem regarding sysfs; the reason is that one process
has, for example, /sys/class/net/eth0 entry, but a second process,
with a different namespace, can also
have a (different) /sys/class/net/eth0 entry. The entry
/sys/class/net/eth0 has an important
data :flags, statistics, and other parameters which are unique for each
process with a different network stack.

A solution for it was proposed by tagged sysfs, and patches were sent already
in August 2008. They were accepted into GregKH tree, but as I said,
recently GregKH announced that they are dropped because of a BUG.

In this thread in LKML (Linux Kernel Mailing List), GregKH  talks about
dropping the sysfs patch from his tree:
http://marc.info/?l=linux-kernel&m=122318517411596&w=2
the patch is:
driver-core/sysfs-implement-sysfs-tagged-directory-support.patch

see also:
"Sysfs and namespaces" article in: http://lwn.net/Articles/295587/

4) The links to the two vpn solutions I mentioned (and do not appear
in the slides) are:
http://www.openswan.org/
http://www.openvpn.org/

Best Regards,
Rami Rosen

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[CALL FOR LECTURES] Tickless Kernel/CFS Scheduler

2008-11-06 Thread Orna Agmon Ben-Yehuda
Hello All,

Two topics are calling for a lecture which exposes the internals (and
guts) of the new Linux:

*Tickless Kernel - how was it done? What are the mechanisms available
inside the kernel? What is expected of userspace programs? What should
a user do to make the best usage of a tickless kernel (powertop?
anything else?).

*Completely Fair Schedule - Ingo Molnar's (yet new) scheduler. I
remind you of Erez Hadad's lecture at Haifux about Ingo Molnar's O(1)
scheduler, which brought a record attendance (for the time) of 36
people.

Let the person who knows his/her kernel rise to the stage and speak!

Thanks,
Orna.

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efficiant debian backup

2008-11-06 Thread Erez D
After i was able to "ghost" my ntfs partitions, using ntfsclone, i wanted to
backup my linux partitions also

so i thought: whouldn't it be nice if there was a backup utility, which can
find which file is part of a package (via dpkg) and not back it up at all,
than if i have a disaster, i could just reinstall all packages i have, and
restore from backup. to get my old system back.

this will reduce the backup process bigtime !


thank i thought: myabe someone already thought of that ..


did anyone see such a utility ?

thanks,
erez.