[LTP] [PATCH 1/1] if-mtu-change.sh: Lower CHANGE_INTERVAL to 1

[Alexey Kodanev]

On 14.01.2021 17:47, Petr Vorel wrote:
> Hi Alexey,
> 
>> Hi Petr,
> 
>> Do you mean "sleep $NS_DURATION" in mcast-pktfld02.sh is not needed
> Yes: sleep $NS_DURATION in mcast-pktfld02.sh and other mcast*.sh tests in:
> https://urldefense.com/v3/__https://patchwork.ozlabs.org/project/ltp/patch/20201125053459.3314021-2-lkml@jv-coder.de/__;!!GqivPVa7Brio!P0xbdqXlRQX7GPsKJmcPapdEOX5VV4OnkCKv-P9OqIWNcTvY9a9KXhOSjdJ1dKco5YbG$ 
> https://urldefense.com/v3/__https://patchwork.ozlabs.org/project/ltp/patch/20201125053459.3314021-1-lkml@jv-coder.de/__;!!GqivPVa7Brio!P0xbdqXlRQX7GPsKJmcPapdEOX5VV4OnkCKv-P9OqIWNcTvY9a9KXhOSjdJ1dKjzIVpO$ 
> 

It's needed because the commands run in parallel in the background
during $NS_DURATION. Without it, the test terminates them all shortly
after starting.