RE: [patch iproute2 v6 0/3] tc: Add -bs option to batch mode

[Chris Mi]

> >> I wonder whether specifying the batch size is necessary at all.
> >> Couldn't batch mode just collect messages until either EOF or an
> >> incompatible command is encountered which then triggers a commit to
> >> kernel? This might simplify code quite a bit.
> > That's a good suggestion.
> 
> Thanks for your time on this, Chris.
After testing, I find that the message passed to kernel should not be too big.
If it is bigger than about 64K, sendmsg returns -1, errno is 90 (EMSGSIZE).
That is about 400 commands.  So how about set batch size to 128 which is big 
enough?