On Fri, Sep 27, 2024 at 09:25:11PM -0400, Michael Stone wrote: > On Sat, Sep 28, 2024 at 01:20:17AM +0100, Matthew Wilcox wrote: > > On Fri, Sep 27, 2024 at 06:23:05PM -0400, Michael Stone wrote: > > > It would be just as confusing for cp to ignore reflink, right? > > > > I didn't ask cp to use reflink. It chose to do that all by itself. > > I asked for a sparse file to be made, and it didn't do that. > > You did, by not selecting reflink=always or reflink=never.
I didn't even know cp had grown a --reflink option. So no, I didn't ask cp to use reflink. But I did ask it to use sparse. That should disable reflink.