If total package's size is larger than rootfs filesystem size, it makes errors even though second partition has extra partition's size.
So we find other general solution, but if not rpm consider all partition size and calculate file's size, i think there are no other solution for this.

could you list the real case and number?
disk size, how many partition, each partition size, mount point for each partiton, package size

Sorry. I can't list partitions and package information of our products.
But we use various partitions for performance, storage efficiency and product issues like /boot, /opt and so on.
So if you want to test this problem, please fix rootfs size like 256Mb, and mount partition like /var or /usr or /opt as partition including large data.

Is there any additional modification point or alternatives?
And I added 4 commits. please review those patches too.

I have no more comments, but now we are moving the mic development work from internal to tizen.org. (github is not the place we merge patches) so please resubmit the patch after the tizen.org repository is stable. I'll ping you when tizen.org is ready to receive patches.

How far are you on repository stabilization?
and please confirm below repository path.
(https://review.tizen.org/gerrit/tools/mic)

Yes, the path is correct.

Although we haven’t try the release process from tizen.org, the above code repository should be good for accepting new requests for devel branch. So feel free to submit your change there.