Re: [PATCH v3 0/6] Static calls

[Josh Poimboeuf]

On Fri, Jan 11, 2019 at 01:10:47PM -0800, Linus Torvalds wrote:
> On Fri, Jan 11, 2019 at 1:05 PM Andy Lutomirski <luto@xxxxxxxxxx> wrote:
> >
> > > Yeah, my suggestion doesn't allow for batching, since it would
> > > basically generate one trampoline for every rewritten instruction.
> >
> > Sure it does.  Just make 1000 trampolines and patch 1000 sites in a
> > batch :)  As long as the number of trampolines is smallish (e.g. fits
> > in a page), then we should be in good shape.
> 
> Yeah, I guess that's true.
> 
> But let's not worry about it. I don't think we do batching for any
> alternative instruction rewriting right now, do we?

Not at the moment, but Daniel has been working on some patches to do so:

  https://lkml.kernel.org/r/cover.1545228276.git.bristot@xxxxxxxxxx

-- 
Josh