On: Rob Pike discovers sendfile(2)

[tptacek]

For the uninitiated, the TLB is the thing that keeps your MMU hardware from having to trawl through the page directory in memory every time it accesses a virtual address; it's a cache, and you generally want to avoid flushing it.

[sovande → tptacek]

Oh that made it so much more clearer :)

[groks → sovande]

http://lwn.net/Articles/253361/