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

[Baoquan He]

On 07/11/14 at 10:46am, Vivek Goyal wrote:
> On Fri, Jul 11, 2014 at 10:39:45PM +0800, Baoquan He wrote:
> > On 07/11/14 at 10:35am, Vivek Goyal wrote:
> > > On Fri, Jul 11, 2014 at 03:16:04PM +0800, Baoquan He wrote:
> > > > ->$ ./makedumpfile  --mem-usage  /proc/kcore
> > > > Excluding unnecessary pages        : [100.0 %] |
> > > > 
> > > > Page number of memory in different use
> > > > --------------------------------------------------
> > > > TYPE			PAGES			EXCLUDABLE	DESCRIPTION
> > > > pfn_zero		0x0000000000000000	yes		Pages filled with zero
> > > > pfn_cache		0x000000000002b19f	yes		Cache pages
> > > > pfn_cache_private	0x0000000000042526	yes		Cache pages + private
> > > > pfn_user		0x0000000000026bc3	yes		User process data pages
> > > > pfn_free		0x0000000000133f79	yes		Free pages
> > > > pfn_hwpoison		0x0000000000000000	yes		Hwpoison pages
> > > 
> > > Is there a need to display hwpoison pages? I think they are excluded by
> > > default. Otherwise reading them might kill makedumpfile process.
> > 
> > You are right, hwpoison pages are excluded by default. But it truly
> > calculated in makedumpfile. I will change it as non-excludable like
> > below:
> > 
> > TYPE			PAGES			EXCLUDABLE	DESCRIPTION
> > pfn_hwpoison		0x0000000000000000	No		Hwpoison pages
> 
> I think we don't have to display hwpoison pages. It is of no use. Let us
> just display the pages which can be excluded using various filtering
> levels and total number of pages (without memory hole).
> 
> That way people can do some math.
> 
> amount of disk space required = total_pages - filtered pages;

Sounds reasonable! Will change.

> 
> Thanks
> Vivek
> 
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