Cc: linux-kernel for generic bit of this change. Rest of patch was posted to linux-ia64: http://marc.theaimsgroup.com/?l=linux-ia64&m=116070997529216&w=2 On Thu, Oct 12, 2006 at 10:25:58PM -0500, Russ Anderson wrote: > int sched_create_sysfs_power_savings_entries(struct sysdev_class *cls) > { > - int err = 0; > + int err = 0, c; > > #ifdef CONFIG_SCHED_SMT > - if (smt_capable()) > - err = sysfs_create_file(&cls->kset.kobj, > + for_each_online_cpu(c) > + if (smt_capable(c)) { > + err = sysfs_create_file(&cls->kset.kobj, > &attr_sched_smt_power_savings.attr); > + break; > + } > #endif What if you booted an all-Madison system, and then hot-plugged some Montecitos later? Either we'd need the hotplug cpu code to run through this routine again to re-test whether any cpu has multi-thread support (it doesn't look like it does that now). Or perhaps it would be simpler to dispense with this test and always call sysfs_create_file() here (still inside CONFIG_SCHED_SMT) so that the hook is always present to tune the scheduler (even if it may be ineffective on a no-smt system)? -Tony - To unsubscribe from this list: send the line "unsubscribe linux-ia64" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
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