Re: [PATCH v4 1/1] mm: introduce put_user_page*(), placeholder versions

Christopher Lameter
2019-03-20T01:01:09Z

On Wed, 20 Mar 2019, Dave Chinner wrote:

> So the plan for GUP vs writeback so far is "break fsync()"? :)

Well if its an anonymous page and not a file backed page then the
semantics are preserved. Disallow GUP long term pinning (marking stuff like in this
patchset may make that possible) and its clean.