Re: [PATCH] mm, sparse: fix typo in online_mem_sections

[Michal Hocko]

On Tue 05-09-17 12:32:28, Anshuman Khandual wrote:
> On 09/04/2017 04:52 PM, Michal Hocko wrote:
> > From: Michal Hocko <mhocko@xxxxxxxx>
> > 
> > online_mem_sections accidentally marks online only the first section in
> > the given range. This is a typo which hasn't been noticed because I
> > haven't tested large 2GB blocks previously. All users of
> 
> Section sizes are normally less than 2GB. Could you please elaborate
> why this never got noticed before ?

Section size is 128MB which is the default block size as well. So we
have one section per block. But if the amount of memory is very large
(64GB - see probe_memory_block_size) then we have a 2GB memory blocks
so multiple sections per block.
-- 
Michal Hocko
SUSE Labs