On Thu, Dec 01, 2022 at 03:28:52PM +, Shiyang Ruan wrote:
> CoW changes the share state of a dax page, but the share count of the
> page isn't updated. The next time access this page, it should have been
> a newly accessed, but old association exists. So, we need to clear the
> share state
CoW changes the share state of a dax page, but the share count of the
page isn't updated. The next time access this page, it should have been
a newly accessed, but old association exists. So, we need to clear the
share state when CoW happens, in both dax_iomap_rw() and
dax_zero_iter().
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