[Linux-cachefs] Re: [PATCH 2/7] FS-Cache: Add notification of page becoming writable to VMA ops

[Zach Brown]

David Howells wrote:
> The attached patch adds a new VMA operation to notify a filesystem or other
> driver about the MMU generating a fault because userspace attempted to write
> to a page mapped through a read-only PTE.

This will almost certainly help OCFS2 get shared writable mmap() right,
too, though it probably won't be the whole story.

- z