Messages in this thread | | | Date | Mon, 1 Oct 2012 08:23:38 -0700 (PDT) | From | Hugh Dickins <> | Subject | Re: x86_64: wrong DirectMap kB |
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On Mon, 1 Oct 2012, Jamie Gloudon wrote: > > Interesting. I am able to reproduce the same problem as you using mem=700M, which shows: > > DirectMap4k: 4096 kB > DirectMap2M: 18446744073709547520 kB > > However, it appears to be normal without the boot parameter: > > DirectMap4k: 4096 kB > DirectMap2M: 15708160 kB
It appears to be normal because the calculations haven't wrapped around, but if you compare with 3.4 or before, I think you'll find that it still adds up to too little.
> > What does your output looks like with the full amount on 3.6?
On 3.6:
MemTotal: 8060528 kB ... DirectMap4k: 2048 kB DirectMap2M: 7229440 kB
So it's showing significantly less direct mapped than is included in MemTotal (which itself omits some areas of reserved memory).
Whereas on 3.4:
MemTotal: 8060760 kB ... DirectMap4k: 4096 kB DirectMap2M: 8275968 kB
Hugh
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