On 1/16/2013 4:29 PM, Andrew Morton wrote: > On Wed, 16 Jan 2013 15:25:44 +0900 > Yasuaki Ishimatsu <isimatu.yasuaki@xxxxxxxxxxxxxx> wrote: > >>> >>> Things I'm wondering: >>> >>> - is there *really* a case for retaining the boot option if/when >>> SRAT support is available? >> >> Yes. If SRAT support is available, all memory which enabled hotpluggable >> bit are managed by ZONEMOVABLE. But performance degradation may >> occur by NUMA because we can only allocate anonymous page and page-cache >> from these memory. >> >> In this case, if user cannot change SRAT information, user needs a way to >> select/set removable memory manually. > > If I understand this correctly you mean that once SRAT parsing is > implemented, the user can use movablecore_map to override that SRAT > parsing, yes? That movablecore_map will take precedence over SRAT? I think movablecore_map (I prefer movablemem than it, btw) should behave so. because of, for past three years, almost all memory hotplug bug was handled only I and kamezawa-san and, afaik, both don't have hotremove aware specific hardware. So, if the new feature require specific hardware, we can't maintain this area any more. -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>