Re: [PATCHv6 06/37] thp: handle write-protection faults for file THP
From: Matthew Wilcox
Date: Thu Feb 09 2017 - 15:35:58 EST
On Thu, Jan 26, 2017 at 02:57:48PM +0300, Kirill A. Shutemov wrote:
> For filesystems that wants to be write-notified (has mkwrite), we will
> encount write-protection faults for huge PMDs in shared mappings.
>
> The easiest way to handle them is to clear the PMD and let it refault as
> wriable.
>
> Signed-off-by: Kirill A. Shutemov <kirill.shutemov@xxxxxxxxxxxxxxx>
> Reviewed-by: Jan Kara <jack@xxxxxxx>
Reviewed-by: Matthew Wilcox <mawilcox@xxxxxxxxxxxxx>