Re: [PATCH] mm: convert totalram_pages, totalhigh_pages and managed_pages to atomic.

[Michal Hocko <mhocko@kernel.org>]

[Trimmed CC list + Julia - there is indeed no need to CC everybody maintain a
file you are updating for the change like this]

On Tue 23-10-18 10:16:51, Arun Sudhilal wrote:
> On Mon, Oct 22, 2018 at 11:41 PM Michal Hocko <mhocko@kernel.org> wrote:
> >
> > On Mon 22-10-18 22:53:22, Arun KS wrote:
> > > Remove managed_page_count_lock spinlock and instead use atomic
> > > variables.
> >
> 
> Hello Michal,
> > I assume this has been auto-generated. If yes, it would be better to
> > mention the script so that people can review it and regenerate for
> > comparision. Such a large change is hard to review manually.
> 
> Changes were made partially with script.  For totalram_pages and
> totalhigh_pages,
> 
> find dir -type f -exec sed -i
> 's/totalram_pages/atomic_long_read(\&totalram_pages)/g' {} \;
> find dir -type f -exec sed -i
> 's/totalhigh_pages/atomic_long_read(\&totalhigh_pages)/g' {} \;
> 
> For managed_pages it was mostly manual edits after using,
> find mm/ -type f -exec sed -i
> 's/zone->managed_pages/atomic_long_read(\&zone->managed_pages)/g' {}
> \;

I guess we should be able to use coccinelle for this kind of change and
reduce the amount of manual intervention to absolute minimum.
-- 
Michal Hocko
SUSE Labs