linuxolator: ... not implemented

[Alexander Leidinger]

On Sat, 25 Jan 2014 00:27:10 -0800
Yuri <yuri at rawbw.com> wrote:

> On 01/24/2014 14:16, Alexander Leidinger wrote:
> > Some comments regarding the linux packages:
> >   - the goal with the linux_base ports is to switch from Fedora to
> > CentOS
> >   - the linux_base ports are not designed for the use with chroot
> >   - the linux_dist port can be used with chroot
> >   - do you mind to give the linux_base-c6 port a try and maybe even
> > use it as a base for your development?
> 
> But linux_base is a repackaging of the various linux shared libraries 
> into yet another package. Why even bother doing this, if this all is 
> already pre-packaged by linux folks?

To use one tool to rule them all (= if you want to install software on
FreeBSD, use the FreeBSD package management tool).

Apart from that, please investigate more deeply what the linux_base
ports are doing, one eample:
 - NOT packaging files which are available in the linux package to fall
   through to the FreeBSD files in the same location
 - replacing linux files with symlinks/wrappers to use the
   corresponding FreeBSD functionality
Both of them result in re-using FreeBSD infrastructure to lessen the
need to do some config inside the linux area to have it configured the
same way as FreeBSD.

> CentOS also uses rpm/yum, just like Fedora. The difference is merely
> a repository string for yum. I am not sure if this will practically

The difference which was important for us is that the Fedora has a
faster turn-around time with new versions than CentOS. We don't have
the man-power to cope with the fast release cycle of Fedora.

> even make any difference at all, stock Fedora vs. stock CentOS. I can
> install any rpm package in fewer lines of code than in a Makefile of
> linux_base-c6.
> 
> User side done this way works like a charm. Most work is to implement 

Off-course, but what you are doing is a linux_dist setup (plain
vanilla linux, OK to chroot into), not a linux_base setup (a
FreeBSD-blended-linux, NOT OK to chroot into because of missing
configs as there is no fall-through to FreeBSD config files).

> missing kernel features, and some yet unexplained malfunctions.
> Missing futex operations being one of them, but there are quite a few
> others.

One known problem in the futex area is (attention: this is IIRC!) that
futexes don't work after a fork(), but we don't know how often this is
used or if it is used at all.

Bye,
Alexander.

-- 
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