Messages in this thread |  | | Date | Thu, 17 Jan 2013 13:55:24 -0800 | From | Dave Hansen <> | Subject | Re: [RFC] Reproducible OOM with just a few sleeps |
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On 01/17/2013 01:04 PM, paul.szabo@sydney.edu.au wrote: >>> On my large machine, 'free' fails to show about 2GB memory ... >> You probably have a memory hole. ... >> The e820 map (during early boot in dmesg) or /proc/iomem will let you >> locate your memory holes. > > Now that my machine is running an amd64 kernel, 'free' shows total Mem > 65854128 (up from 64447796 with PAE kernel), and I do not see much > change in /proc/iomem output (below). Is that as should be?
Yeah, that all looks sane. Your increased memory is because your 64GB machine had some of its memory mapped _above_ the 64GB physical memory limit that PAE has.
/proc/iomem is generally just a dump of what the hardware *is*, so it shouldn't change between kernels.
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