On Sun, Nov 3, 2019 at 2:43 PM Chengguang Xu <cgxu519@xxxxxxxxxxxx> wrote: > > ---- 在 星期四, 2019-10-31 14:53:15 Amir Goldstein <amir73il@xxxxxxxxx> 撰写 ---- > > > > Yes, overlayfs does not comply with this "posix"' test. > > > > This is why it was removed from the auto and quick groups. > > > > > > So I'm curious what is the purpose for the test? > > > > > > > This is a POSIX compliance test. > > It is meant to "remind" us that this behavior is not POSIX compliant > > and that we should fix it one day... > > A bit controversial to have a test like this without a roadmap > > when it is going to be fixed in xfstests, but it's there. > > I haven't checked carefully for the detail but It seems feasible if we copy-up lower file during mmap regardless of ro/rw mode. > Is it acceptable by slightly changing copy-up assumption to fulfill POSIX compliance? Or we just wait for a better solution? > That was attempted in the past. It's complicated ;-) Cheers, Amir.
