Re: Re: Re: [PATCH] [RESEND] x86_64: add memory hotremove config option

[kamezawa . hiroyu]

----- Original Message -----
>>Having said that, i have my doubts about its generic utility (the power 
>>saving aspects are likely not realizable - nobody really wants DIMMs to 
>>just sit there unused and the cost of dynamic migration is just 
>>horrendous) - but as long as it's opt-in there's no reason to limit the 
>>availability of an in-kernel feature artificially.
>
>Nobody ? maybe just a trade-off problem in user side. 
>Even without DIMM hotplug or DIMM's power save mode, making a DIMM idle
>is of no use ? I think memory consumes much power when it used.
>Memory Hotplug and ZONE_MOVABLE can make some memory idle.
>(I'm sorry if my thinking is wrong.)
>
But I have to point out HDD access consumes far power than memory.
That's trade-off problem depends on usage, anyway.

Thanks,
-Kame
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