All the Python versions we support now implement sendfile fallback so its likely our sendfile fallback code is no longer needed.

[bdraco]

On a side note, all the Python versions we support now implement sendfile fallback so its likely our sendfile fallback code is no longer needed.

Originally posted by @bdraco in #10095 (comment)

[bdraco]

It looks like we have an env var to turn off SENDFILE for ancient versions of virtualbox

#628

https://www.virtualbox.org/ticket/12597
https://www.virtualbox.org/ticket/9069

[bdraco]

History #628 #629

[bdraco]

That bug has been fixed in virtualbox for 6 years now.

I think we can get rid of it in 4.x but keep in in 3.x

[asvetlov]

Should we care about 6 years old virtualbox?
Code cleanup matters for me in terms of the maintenance cost.

[Dreamsorcerer]

We also don't want to accidentally break existing systems, so dropping it from v4 sounds like a safe move with minimal maintenance cost.