On Mon, 2015-08-24 at 08:44 +0200, Ingo Molnar wrote: > the 'housekeeping CPU' is essentially the boot CPU. Yet we dedicate a full > mask to > it (housekeeping_mask - a variable mask to begin with) and recover the > housekeeping CPU via: > > + return cpumask_any_and(housekeeping_mask, cpu_online_mask);
There can be, and had better be if box is big, multiple housekeepers. Imagine a NO_HZ_FULL_ALL kernel on an SGI beast from hell. Offloading 8191 CPUs onto poor little CPU0 probably wouldn't work out well :) -Mike -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/