echo 1 > foo; stat foo; echo 2 > foo; stat foo
Do both stats show the same mtime for the file? Seeing that on some linux 2.16 systems and trying to understand why.
@joeyh likely, maybe the storage resolution of the mtime
@joeyh I get an mtime difference:
Modify: 2018-10-30 10:02:02.612055158 +0200
Modify: 2018-10-30 10:02:02.616055159 +0200
My computer's not fast enough for that difference. I assume your speculation of some in-kernel minimum timer tick is on the right track.