/proc/vmcore mmap() failure issue

[H. Peter Anvin]

On 11/13/2013 02:41 PM, Vivek Goyal wrote:
> 
> Hi Peter,
> 
> I noticed we seem to be trimming away partial pages in memblock.
> 
> memblock_x86_fill() {
> 	/* throw away partial pages */
>         memblock_trim_memory(PAGE_SIZE);
> }
> 
> But not in e820 hence they show up in /proc/iomem.
> 

Why does /proc/iomem matter?

> How about something along the lines as below patch. This fixes my
> /proc/vmcore mmap() issue.

I'm not sure if what you're seeing is something that is better handled
in userspace.

	-hpa