Re: [PATCH v3 2/3] sha1_file: open window into packfiles with O_CLOEXEC

Linus Torvalds [off-list ref] writes:

But the basic issue still remains - I'd really prefer to have NOATIME
stay around for all those poor misguided souls that for some reason
don't like "relatime" or run old kernels. But whether it is with
O_NOATIME at open time or with F_SETFL, I don't care.

Understood.  

Would the best endgame shape for this function be to open with
O_NOATIME (and retry without), and then add CLOEXEC with fcntl(2)
but ignoring an error from it, I guess?  That would be the closest
to what we historically had, I would think.