On Linux kernel maintainer scalability

Subsystems differ. As tglx nicely put it at LinuxCon, I2C is more of a "drive-by" subsystem. You do the driver, get it accepted, then move on to, say, SPI. This is different from GFX and network drivers which need more constant attention. So IMO, there it is easier to keep developers also attached to the whole subsystem, too.

That being said, I got co-maintainers for ACPI and muxes. I definately am willing to share responsibility and do that when I see talent. Currently, though, there are exactly 0 regular reviewers on the list which I could award with extra responsibility.