Re: [PATCH 01/29] iov_iter: Switch to using a table of operations

[David Howells]

Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx> wrote:

>  - I worry a bit about the indirect call overhead and spectre v2.

I don't know enough about how spectre v2 works to say if this would be a
problem for the ops-table approach, but wouldn't it also affect the chain of
conditional branches that we currently use, since it's branch-prediction
based?

David