Re: [PATCH v3 0/7] x86: Rewrite switch_to()

[Linus Torvalds]

On Sat, Aug 13, 2016 at 9:38 AM, Brian Gerst <brgerst@xxxxxxxxx> wrote:
> This patch set simplifies the switch_to() code, by moving the stack switch
> code out of line into an asm stub before calling __switch_to().  This ends
> up being more readable, and using the C calling convention instead of
> clobbering all registers improves code generation.  It also allows newly
> forked processes to construct a special stack frame to seamlessly flow
> to ret_from_fork, instead of using a test and branch, or an unbalanced
> call/ret.

Do you have performance numbers? Is it noticeable/measurable?

             Linus