On Saturday 14 February 2009 10:18:05 Peter Zijlstra wrote: > On Sat, 2009-02-14 at 07:46 +1030, Rusty Russell wrote: > > I'd be fascinated to see perf numbers once you kill the kmalloc. Because > > this patch will add num_possible_cpus * NR_CPUS/8 bytes to the kernel which > > is something we're trying to avoid unless necessary. > > You're free to make it a pointer and do node affine allocations from an > init section of choice and add a hotplug handler. > > But I'm not quite sure how perf is affected by size overhead on > ridiculous configs. No, I meant "can you actually measure the perf win of this patch?". If you did so, I missed it? But if this patch is worthwhile, the right way to do this is make it a cpumask_var_t, and do the alloc_cpumask_var_node() in that init routine. Thanks, Rusty. -- To unsubscribe from this list: send the line "unsubscribe linux-rt-users" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
