[PATCH 7/7] add a new interface to show the memory usage of 1st kernel

[Vivek Goyal]

On Fri, Jul 11, 2014 at 10:35:30PM +0800, Baoquan He wrote:

[..]
> > How about calling them just "User process pages" and not "user process
> > data pages" I am assuming that they could contain text too.
> 
> This function is based on the print_report() which is in makedumpfile.
> It has been defined like these already. But I will change this according
> reviewer's comments. After all, they are different.

Actually notation should match what's in makedumpfile man page. So that
a user can easily associate dump filtering levels with pages here.

> 
> > 
> > > pfn_free		0x0000000000133f79	yes		Free pages
> > > pfn_hwpoison		0x0000000000000000	yes		Hwpoison pages
> > > pfn_kernel_data		0x000000000001dd56	no		Dumpable kernel data
> > > 
> > > Total pages on system:	0x00000000001e5f57
> > > Excludable pages:	0x00000000001c8201
> > > Memory Hole: 		0x00000000000386a9
> > 
> > What is "Memory Hole" ?
> 
> That areas which are between "System Ram".

I think we should remove it from output. We are not concerned where memory
holes are. One can look up /proc/iomem to figure out where memory holes
are.

> 
> > 
> > > --------------------------------------------------
> > > Total pages:		0x000000000021e600
> > 
> > How this total pages is different from "Total pages on system"?
> 
> "Total pages on system" is all physical pages without hole. "Total pages"
> is equal to the max_pfn in current system. This is got from the
> print_report() too. It could be removed if people think it's useless.

We are just interested in total pages without memory hole. And can
remove total pages with memory hole.

Thanks
Vivek