Btrfs too. Booting to subvolume

You can check subvolume name with sudo btrfs subvol list /
Now you can create boot to subvolume record in grub.
Just add rootflags=subvol=<subvol_name> to linux kernel load string in grub menu item or use this to probe automatically.

3d printing ON TITANium

Electromagnetic induction gives heating bonus.
Try 120 celsium.
And isolate heating bed pins with capton.

Putting a mirror under bed significantly increases heating speed.

I have to note that high quality ABS used.

Btrfs

What is the most powerful feature of Btrfs for you?

Copy-on-write? Instant snapshots? Transactions? Deduplication:

duperemove /var/chroot/ /usr/ /bin/ /etc/ /lib* /var/lib/ /opt/ /boot/ /sbin/ /home/ -rd

Kernel processed data (excludes target files): 56513581056 Comparison of extent info shows a net change in shared extents of: 19615367505

Cool economy on chroots huh? And I had only four chroots for that moment! I guess this gives new wide ranges for VPS and VDS hosting providers. But who of them uses Btrfs...  

Gentoo secure Java

Everything was calm...

But what is it here https://github.com/gentoo/gentoo/pull/813#issuecomment-207053399
Looks like one of Gentoo developers thinks he know better what Gentoo "user" need...
But one brave developer took attempt to use FREE version of java (icedtea), not the one a developer prepared by his hands and put at a server in binary state... Here is the attempt https://github.com/gentoo/gentoo/pull/1221. It was brave attempt... But, now he calm.

Not going to do this, sorry, at least not for the time being. he say
We currently never mark icedtea stable he say
We don't promote icedtea over icedtea-bin he say
  ...`because it takes hours to build on some hardware and requires either itself (obviously a problem), icedtea-bin (so you'll need that either way) or gcj (even longer build time and Portage gets confused over the ant-core dependency). The icedtea build may run out of RAM depending on your CFLAGS and I've seen it fail for all sorts of other reasons. icedtea-bin is not some untrusted build from upstream but built by myself with Gentoo.`...................................................what?......does.......he.........HIDDING!!!

Setting up Eclipse native Python support

Update site is http://download.eclipse.org/technology/dltk/updates-dev/latest/

If you have questions about the project, you should connect directly with the development via the channels indicated on their contact page:

https://projects.eclipse.org/projects/technology.dltk/contact

Most would tell PyDev has far more features but it worst to try and support its development.