> > Hi Shiang, > > Thanks for picking up this work. > > On 8:20 26/02, Shiyang Ruan wrote: > > This patchset is attempt to add CoW support for fsdax, and take XFS, > > which has both reflink and fsdax feature, as an example. > > How does this work for read sequence for two different files > mapped to the same extent, both residing in DAX? > > If two different files read the same shared extent, which file > would resultant page->mapping->host point to? > > This problem is listed as a TODO over dax_associate_entry() and is > still not fixed.
I have posted another patchset which I called "fix dax-rmap"[1]. It is a try to solve this problem, but still in disscussion for now. [1] https://lkml.org/lkml/2021/2/8/347 -- Thanks, Ruan Shiyang. > > <snip> > > -- > Goldwyn
