Re: [rfc patch] i386: don't save eflags on task switch

Linus Torvalds
2006-11-04T00:50:33Z

On Fri, 3 Nov 2006, Chuck Ebbert wrote:
>
> There is no real need to save eflags in switch_to(). Instead,
> we can keep a constant value in the thread_struct and always
> restore that.

I don't really see the point. The "pushfl" isn't the expensive part, and
it gives sane and expected semantics.

The "popfl" is the expensive part, and that's the thing that can't really
even be removed.

Linus