By the time Linus Torvalds released 5.8-rc1
and closed the merge
window for this development cycle, 14,206 non-merge changesets had
been pulled into the repository for 5.8. That is more work than
was pulled for the entire 5.7 cycle; clearly development work on the kernel
has not (yet) slowed
down in response to events in the wider world. The nearly 6,700 changes
pulled since the previous summary include
huge numbers of fixes and internal cleanups, but there were a number of
significant features added as well.

Source: LWN.net – [$] 5.8 Merge window, part 2