Re: versioning

[Ruediger Meier <sweet_f_a@gmx.de>]

On Wednesday 17 May 2017, Karel Zak wrote:
> On Wed, May 17, 2017 at 10:42:53AM +0200, Ruediger Meier wrote:
> > v3 just to avoid big numbers. But could also be a hint regarding
> > the minimum supported/tested kernel version. I believe that we have
> > already a few incompatibilities for kernel <2.6.32. Maybe we could
> > cleanup our code, only supporting kernel >=3.1.
>
> I'm almost sure we have users who use util-linux on old kernels. For
> example RHEL6 with 2.6.32 is pretty common and I have no problem to
> compile util-linux there. And sometimes we also backport patches from
> util-linux upstream to RHEL6 etc ;-)

Hehe, I think 2.6.32 LTS is a very good lower boundary and it's almost 
kernel v3. ;) This version was released in 2009 and widely used (SLE, 
RHEL, Xen and many devices, routers, etc.).

I remember 73f4f3d9 where I fixed a 3 year old bug in ipcs. Probably 
nobody noticed this. So I don't think that anbody is really using 
recent ul on even older kernels.

> It's fine to kill things for 2.2 (etc.) but for I'd like to be
> friendly to 2.6 users (if possible).

We could remove <=2.4 hacks from our code, if any. Especially such very 
old history in the man pages, like tunelp.8:

"... the -T option on a 2.0.36 kernel with an tunelp compiled under 
2.1.131 or later may have unexpected effects."


cu,
Rudi

>     Karel
>
>
> ./lscpu --version
> lt-lscpu from util-linux 2.30-rc1-25-b7eb
>
> $ ./lscpu
> Architecture:        s390x
> CPU op-mode(s):      32-bit, 64-bit
> Byte Order:          Big Endian
> CPU(s):              4
> On-line CPU(s) list: 0-3
> Thread(s) per core:  1
> Core(s) per socket:  1
> Socket(s) per book:  1
> Book(s):             4
> Vendor ID:           IBM/S390
> Machine type:        2827
> BogoMIPS:            2913.00
> Hypervisor vendor:   (null)
> Virtualization type: full
> Dispatching mode:    horizontal
> Flags:               esan3 zarch stfle msa ldisp eimm dfp etf3eh
> highgprs
>
> $ uname -a
> Linux devel2.s390.bos.redhat.com 2.6.32-550.el6.s390x #1 SMP Fri Apr
> 3 10:12:50 EDT 2015 s390x s390x s390x GNU/Linux