Those are summaries of summaries of branches of commits. Actual commit and merge messages all have good titles and descriptions. full list: https://git.kernel.

Those are summaries of summaries of branches of commits. Actual commit and merge messages all have good titles and descriptions. full list: https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/log/?id=refs/tags/v4.9 https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.... (very "slow" at the very end of the development cycle) example merge: https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=810ac7b7558d7830e72d8dbf34b851fce39e08b0 https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.... example commit: https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=24d0492b7d5d321a9c5846c8c974eba9823ffaa0 https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.... I picked some of the longer ones on the first page just for contrast with your impression, many have shorter commit messages, but they all have a commit message with some explanation.