On Thu, Dec 12, 2019 at 04:15:49PM +0000, halfdog wrote: > Hello list, > > Using btrfs on > > Linux version 5.3.0-2-amd64 (debian-kernel@xxxxxxxxxxxxxxxx) (gcc version 9.2.1 20191109 (Debian 9.2.1-19)) #1 SMP Debian 5.3.9-3 (2019-11-19) > > the FIDEDUPERANGE exposes weird behaviour on two identical but > not too large files that seems to be depending on the file size. > Before FIDEDUPERANGE both files have a single extent, afterwards > first file is still single extent, second file has all bytes sharing > with the extent of the first file except for the last 4096 bytes. > > Is there anything known about a bug fixed since the above mentioned > kernel version? For the record, the fix(es) for deduplicating tail extents have been merged to 5.6 and will appear in stable trees soon.
