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    SubjectRe: [PATCH v2 00/10] fsdax,xfs: Add reflink&dedupe support for fsdax
    Date
    >
    > 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
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