[LTP] [PATCH 1/1] ver_linux: Print sysctl settings

[Cyril Hrubis <chrubis@suse.cz>]

Hi!
> > > > +echo
> > > > +echo 'sysctl settings:'
> > > > +sysctl -a
> 
> > > Ping.
> > > It might be useful to get output of env to see environment variables.
> 
> > Hmm, I find this to be a bit too verbose, do we really have to print all
> > the variables?
> 
> > Can't we grep a few interesting ones and limit the output to something
> > as 20 lines?
> You're right. I'd grep something like:
> env |grep -m 20 -e PATH -e LTP -e RHOST -e IPV4 -e IPV6
> These are just for network related tests, would you propose some more?
> The problem with environment variables (at least for network.sh) is that they are set for
> subshell (child process), so they are not visible when env is running in ver_linux. We
> need to put it into scripts which set them. Either simple echo, or use 'set -x' before
> exporting variables and 'set +x' after.
> 
> Do you want to limit sysctl output somehow as well?

I would do that as well, I doubt that values such as cdrom speed are of
any value for us. Maybe we should just create a whitelist and print only
these variables that we find interesting.

For sysctl that would be as easy as:

for knob in foo.bar1 foo.bar2 ...; do
	sysclt $knob
done

The question is of course which ones. Looking at the sysctl output
settings related to vm overcommit and few from kernel.* namespace looks
most relevant to me. I suppose you want to add some network knobs as
well.

-- 
Cyril Hrubis
chrubis@suse.cz