Re: [PATCHv6 06/37] thp: handle write-protection faults for file THP
From: Matthew Wilcox <willy@infradead.org>
Date: 2017-01-26 15:44:39
Also in:
linux-ext4, linux-fsdevel, linux-mm, lkml
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.
... of course, the filesystem could implement ->pmd_fault, and then it wouldn't hit this case ...