Re: [PATCH] khugepaged: Raplace barrier() with READ_ONCE() for a selective variable

["Kirill A. Shutemov" <kirill@xxxxxxxxxxxxx>]

On Tue, Mar 23, 2021 at 05:27:30PM +0800, yanfei.xu@xxxxxxxxxxxxx wrote:
> From: Yanfei Xu <yanfei.xu@xxxxxxxxxxxxx>
> 
> READ_ONCE() is more selective and lightweight. It is more appropriate that
> using a READ_ONCE() for the certain variable to prevent the compiler from
> reordering.
> 
> Signed-off-by: Yanfei Xu <yanfei.xu@xxxxxxxxxxxxx>

Acked-by: Kirill A. Shutemov <kirill.shutemov@xxxxxxxxxxxxxxx>

-- 
 Kirill A. Shutemov