Footnotes

**UNIX is a registered trademark of AT&T in the US and other countries.

**One might seriously ask the question what good it is if ``only'' one subsystem within the kernel hangs if it is something like the network on a diskless workstation.

**To understand why this number is one observes that the power-of-two algorithm yields sizes of 1, 2, 4, 8, ... pages while the large block algorithm that allocates in multiples of pages yields sizes of 1, 2, 3, 4, ... pages. Thus for allocations of sizes between one and two pages both algorithms use two pages; it is not until allocations of sizes between two and three pages that a difference emerges where the power-of-two algorithm will use four pages while the large block algorithm will use three pages.