Andreas Dilger <adil...@dilger.ca> wrote:
> I think in addition to fixing btrfs (because it needs to work with existing
> tar/rsync/etc. tools) it makes sense to *also* fix the heuristics of tar
> to handle this situation more robustly. One option is if st_blocks == 0 then
> tar should also check if st_mtime is less than 60s in the past, and if yes
> then it should call fsync() on the file to flush any unwritten data to disk,
> or assume the file is not sparse and read the whole file, so that it doesn't
> incorrectly assume that the file is sparse and skip archiving the file data.
A broken filesystem is a broken filesystem.
If you try to change gtar to work around a specific problem, it may fail in
other situations.
Jörg
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