On Wed, 2009-05-20 at 13:58 +0200, Andi Kleen wrote: > Could you explain that please? How does changing the top level > cpuset affect other cpu sets? Suppose you have 8 cpus and created 3 cpusets: A: cpu0 - system administration stuff B: cpu1-5 - generic computational stuff C: cpu6-7 - latency critical stuff Each such set is made a load-balance domain (iow load-balancing on the top level set is disabled). Now, suppose someone thinks its a good idea to remove cpu0 because the machine is running against some thermal limit -- what will all the administration stuff (including sshd) do? Same goes for the latency critical stuff. You really want to start shrinking the generic computational capacity first. The thing is, you cannot simply rip cpus out from under a system, people might rely on them being there and have policy attached to them -- esp. people touching cpusets should know that a machine isn't configured homogeneous and any odd cpu will do. -- To unsubscribe from this list: send the line "unsubscribe linux-acpi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
