Just over 7,500 non-merge changesets have been pulled into the mainline
repository since the opening of the 5.8 merge window — not a small amount
of work for just four days. The early pulls are dominated by the
networking and graphics trees, but there is a lot of other material in
there as well. Read on for a summary of what entered the kernel in the
first part of this development cycle.

Source: LWN.net – [$] 5.8 Merge window, part 1