Messages in this thread | | | Date | Wed, 14 Aug 2013 16:29:05 -0400 | From | KOSAKI Motohiro <> | Subject | Re: [PATCH part5 0/7] Arrange hotpluggable memory as ZONE_MOVABLE. |
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(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.
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