Re: [PATCH] mm: fix potential pte_unmap_unlock pte error

[osalvador]

On 2020-10-16 14:31, Michal Hocko wrote:
> I do not like the fix though. The code is really confusing. Why should
> we check for flags in each iteration of the loop when it cannot change?
> Also why should we take the ptl lock in the first place when the look 
> is
> broken out immediately?

About checking the flags:

https://lore.kernel.org/linux-mm/20190320081643.3c4m5tec5vx653sn@xxxxxxxxxxxx/#t