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

[Baoquan He]

On 07/11/14 at 10:26am, Vivek Goyal wrote:
> On Fri, Jul 11, 2014 at 03:16:04PM +0800, Baoquan He wrote:

> Hi Bao,
> 
> How about priting number of pages in decimal numbers. Humans read decimal
> numbers much better.

That's fine too. I can change it to decimal number. Just think that
maybe it's mainly used by script.


> 
> 
> > --------------------------------------------------
> > TYPE			PAGES			EXCLUDABLE	DESCRIPTION
> > pfn_zero		0x0000000000000000	yes		Pages filled with zero
> 
> I am wondering if we display TYPE of page as follows. Will it be more
> redable

OK, will change.

> 
> ZERO
> CACHE
> CACHE_PRIVATE
> ..
> ..
> 
> > pfn_cache		0x000000000002b19f	yes		Cache pages
> > pfn_cache_private	0x0000000000042526	yes		Cache pages + private
> > pfn_user		0x0000000000026bc3	yes		User process data pages
> 
> 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.

> 
> > 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".

> 
> > --------------------------------------------------
> > 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.

> 
> Thanks
> Vivek