This was the original rule in linux kernel as well. No more than 200 loc per patch. We should also introduce this to git commits and pull request descriptions:
1. 400 chars/10 lines per commit
1b. Not more than 3 commits in the initial pull request
2. 20 lines of explanation for pull request
3. not more than 3 pull request open at any one time
1. 400 chars/10 lines per commit
1b. Not more than 3 commits in the initial pull request
2. 20 lines of explanation for pull request
3. not more than 3 pull request open at any one time