Pablo Conesa added the comment:
So, is it ok, when the fast copy fails, not to _GiveupOnFastCopy(err)?
I can understand that fast copy might fail, but then the Giveup part should
happen and it wasn't.
Additionally, _USE_CP_SENDFILE could be taken, optionally from an environment
variab
New submission from Pablo Conesa :
Hi, one of our users is reporting this starting to happen in a GPFS. All has
been working fine for NTFS so far for many years.
I had a look at my shutil code, and I can see the try/except code trying to
fall back to the "slower" copyfileobj(