On Wed, Jun 02, 2021 at 05:02:10PM +0900, Michael Paquier wrote: > On Wed, Jun 02, 2021 at 06:20:30PM +1200, Thomas Munro wrote: > > The main thing I noticed was that Linux < 5.3 can fail with EXDEV if > > you cross a filesystem boundary, is that something we need to worry > > about there? > > Hmm. Good point. That may justify having a switch to control that.
Paul, the patch set still needs some work, so I am switching it as waiting on author. I am pretty sure that we had better have a fallback implementation of copy_file_range() in src/port/, and that we are going to need an extra switch in pg_rewind to allow users to bypass copy_file_range()/EXDEV if they do a local rewind operation across different FSes with a kernel < 5.3. -- Michael
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