hello Ingo,

在 2013年9月27日星期五，Ingo Molnar 写道：

>
> * Zhang Yanfei <zhangyanfei.yes@gmail.com <javascript:;>> wrote:
>
> > OK. Trying below:
> >
> > movablenode   [KNL,X86] This option enables the kernel to arrange
> >               hotpluggable memory into ZONE_MOVABLE zone. If memory
> >               in a node is all hotpluggable, the option may make
> >               the whole node has only one ZONE_MOVABLE zone, so that
> >               the whole node can be hot-removed after system is up.
> >               Note that this option may cause NUMA performance down.
>
> That paragraph doesn't really parse in several places ...


Sorry…could you point out the places a bit?


>
> Also, more importantly, please explain why this needs to be a boot option.
> In terms of user friendliness boot options are at the bottom of the list,
> and boot options also don't really help feature tests.
>
> Presumably the feature is safe and has no costs, and hence could be added
> as a regular .config option, with a boot option only as an additional
> configurability option?


Yeah, the kernel already has config MOVABLE_NODE, which is the config
enabing this feature, and we introduce this boot option to expand the
configurability.

Thanks.
Zhang


>
> Thanks,
>
>         Ingo
>