KS2009: How Google uses Linux

In the Maemo (at least Diablo release) kernel source there are
configurable limits for when kernel starts to deny allocations and when to
OOM-kill (besides notifying user-space about crossing of these and some
earlier limits). If process is set as "OOM-protected", its allocations
will also always succeed. If "OOM-protected" processes waste all memory
in the system, then they can also get killed.