[PATCH] kill lmb_add_io

Anton Blanchard anton at samba.org
Fri Feb 6 00:36:50 EST 2004


> On the subject of lmb's ... I've got a pSeries 615.  On this machine
> I only see one lmb of 4GB in size.  This is what is dug out of the
> prom by 'prom_initialize_lmb' before any coalescing.  I was somehow
> expecting more lmb's of a smaller size.  Of course, I don't know the
> hardware specifics of this machine or how many DIMMs of what size it
> contains.
> Dave, what does the lmb layout on your 'bigger' machine look like?

You only start caring about it when we talk partitioning and hot swap
memory. The reality is your 615s memory is most probably contiguous.

I seem to remember firmware were doing a 32bit backwards compatible
thing and splitting memory into at least two blocks, one of 4GB or less.
Not sure if they do that any more.


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