There are systems which can. They have the ability to remap in hardware. KOSAKI Motohiro <kosaki.motohiro@xxxxxxxxx> wrote: >(8/14/13 3:55 PM), Tejun Heo wrote: >> Hello, >> >> On Wed, Aug 14, 2013 at 03:40:31PM -0400, KOSAKI Motohiro wrote: >>> I don't agree it. Please look at other kernel options. A lot of >these don't >>> follow you. These behave as direction, not advise. >>> >>> I mean the fallback should be implemented at turning on default the >feature. >> >> Yeah, some options are "please try this" and others "do this or >fail". >> There's no frigging fundamental rule there. > >In this case, we have zero worth for fallback, right? > > >>> I don't read whole discussion and I don't quite understand why no >kernel >>> place controlling is relevant. Every unpluggable node is suitable >for >>> kernel. If you mean current kernel placement logic don't care >plugging, >>> that's a bug. >>> >>> If we aim to hot remove, we have to have either kernel relocation or >>> hotplug awre kernel placement at boot time. >> >> What if all nodes are hot pluggable? Are we moving the kernel >> dynamically then? > >Intel folks already told, we have no such system in practice. > > >>>> Failing to boot is *way* worse reporting mechanism than almost >>>> everything else. If the sysadmin is willing to risk machines >failing >>>> to come up, she would definitely be willing to check whether which >>>> memory areas are actually hotpluggable too, right? >>> >>> No. see above. Your opinion is not pragmatic useful. >> >> No, what you're saying doesn't make any sense. There are multiple >> ways to report when something doesn't work. Failing to boot is *one* >> of them and not a very good one. Here, for practical reasons, the >end >> result may differ depending on the specifics of the configuration, so >> more detailed reporting is necessary anyway, so why do you insist on >> failing the boot? In what world is it a good thing for the machine >to >> fail boot after bios or kernel update? > >Because boot failure have no chance to overlook and better way for >practice. -- Sent from my mobile phone. Please excuse brevity and lack of formatting. -- 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>