On Thu, Oct 04, 2018 at 05:44:54PM -0700, Darrick J. Wong wrote: > From: Darrick J. Wong <[email protected]> > > When we're reflinking between two files and the destination file range > is well beyond the destination file's EOF marker, zero any posteof > speculative preallocations in the destination file so that we don't > expose stale disk contents. The previous strategy of trying to clear > the preallocations does not work if the destination file has the > PREALLOC flag set.
But I think we should still drop speculative delalloc preallocations instead of zeroing them in addition to zeroing of any real blocks in the data fork.
