Re: [Patch 1/8] kexec: allow to shrink reserved memory

[Amerigo Wang <amwang@redhat.com>]

Eric W. Biederman wrote:
> Amerigo Wang <amwang@redhat.com> writes:
>
>   
>> +
>> +	start = roundup(start, PAGE_SIZE);
>> +	end = roundup(start + new_size, PAGE_SIZE);
>> +
>> +	for (addr = end; addr < crashk_res.end; addr += PAGE_SIZE) {
>> +		ClearPageReserved(pfn_to_page(addr >> PAGE_SHIFT));
>> +		init_page_count(pfn_to_page(addr >> PAGE_SHIFT));
>> +		free_page((unsigned long)__va(addr));
>> +		totalram_pages++;
>>     
>
> Any chance we can move this inline snippet into a helper function in
> -mm.  To expose what is happening here to the mm developers.
>
>   

Yes, I believe so. In fact I also wanted to do this, but I forgot before 
I sent these patches... Will do it in the next version.

Thanks.