On Tue 01 Feb 2022, NRK wrote: > On Mon, Jan 31, 2022 at 12:10:27AM +0200, Petros Pateros wrote: > > However, it was pointed out to me that relying on mtime can give wrong > > results, > > for example: > > (a) if the clock is set backwards or in case of insufficient granularity in > > mtime > > then a file that gets modified might have the same mtime > > (b) an mmap(2)-ed file can get modified but its mtime might not get updated > > soon enough > > How likely is it for these situations to occur in practice? If these are > practical problems, then it makes sense to solve them. Otherwise I think > it's best not to waste resource solving theoretical problems.
Speaking for myself, I certainly have experienced issues with inaccurate timestamps on NFS for compute clusters where its use is very common. Not saying this as a supporter of NFS and the likes, just as evidence that it does occur in practice.
