> > ii) disable CPU hardware cache for rogue processes > > This one needs more explanation OK... by example: imagine a badly/maliciously written program that allocates a very large 2D array and accesses it the "wrong way around" resulting in a low cache hit ratio. Not only does it run slowly itself (but that is OK), but it can badly penalise other processes, even those with a much higher priotity (NOT OK). If the CPU hardware cache was disabled for all vm areas belonging to the rogue process, other processes cache hit ratio and execution speed would not be hit so hard. Certainly ix86 hardware could do this (just set the appropriate flag in the page table), but I don't know about other archs. Andy -- Kernelnewbies: Help each other learn about the Linux kernel. Archive: http://mail.nl.linux.org/kernelnewbies/ IRC Channel: irc.openprojects.net / #kernelnewbies Web Page: http://www.kernelnewbies.org/
