On Fri, Jul 19, 2013 at 03:59:33PM +0800, Tang Chen wrote: > Arrange hotpluggable memory as ZONE_MOVABLE will cause NUMA performance down > because the kernel cannot use movable memory. For users who don't use memory > hotplug and who don't want to lose their NUMA performance, they need a way to > disable this functionality. So we improved movablecore boot option. > > If users specify the original movablecore=nn@ss boot option, the kernel will > arrange [ss, ss+nn) as ZONE_MOVABLE. The kernelcore=nn@ss boot option is > similar > except it specifies ZONE_NORMAL ranges. > > Now, if users specify "movablecore=acpi" in kernel commandline, the kernel > will > arrange hotpluggable memory in SRAT as ZONE_MOVABLE. And if users do this, all > the other movablecore=nn@ss and kernelcore=nn@ss options should be ignored. > > For those who don't want this, just specify nothing. The kernel will act as > before.
As I wrote before, I find movablecore=acpi rather weird. Shouldn't it be memory_hotplug enable/disable switch instead and movablecore, if specified, overriding information provided by firmware? Thanks. -- tejun -- 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/
