[$] Maintaining stable stability

The stable kernel trees are quite active, often seeing several releases ina week's time. But they are also meant to be ... well ... stable, so a lotof effort goes into trying to ensure that they do not introduce new bugs orregress the kernel's functionality. One of the stable maintainers, SashaLevin, gave a talk at the virtualOpenSource Summit North America that described the process of ensuring thatthese trees are carefully managed so that they can provide a stable base for their users.