Messages in this thread | | | Date | Thu, 09 Feb 2006 19:56:48 +0900 | From | Yasunori Goto <> | Subject | Re: [discuss] Re: [RFC:PATCH(003/003)] Memory add to onlined node. (ver. 2) (For x86_64) |
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> On Thursday 09 February 2006 10:50, Yasunori Goto wrote: > > > Current code adds memory to ZONE_NORMAL like this. > > But, ZONE_DMA32 is available on 2.6.15. So, I'm afraid there are > > 2 types trouble. > > > > a) When new memory is added to < 4GB, this should be added to > > Zone_DMA32. > > Are there any real machine which allow to add memory under > > 4GB? > > x86-64 machines usually use a continuous memory map > because Windows gets unhappy with too big memory holes (and even > Linux is not completely troublefree for UP install kernels) And for a small > system this implies memory < 4GB.
Ah, Ok. Then, it is bug. :-P
> > > b) If machine boots up with under 4GB memory, and new memory > > is added to over 4GB, then kernel might panic due to Zone Normal's > > initialization is imcomplete. > > > > Q2) > > Are there any real machine which can add memory with NUMA feature? > > There are and will be.
I see. I'll continue my job with x86_64 too. :-)
Thanks.
-- Yasunori Goto
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