Re: [RFC PATCH 6/8] preempt/dynamic: Provide preempt_schedule[_notrace]() static calls

[Josh Poimboeuf]

On Wed, Jan 27, 2021 at 07:44:01PM +0100, Peter Zijlstra wrote:
> On Wed, Jan 27, 2021 at 10:33:08AM -0600, Josh Poimboeuf wrote:
> 
> > What did you think about .static_call_tramp_key?  I could whip up a
> > patch later unless you beat me to it.
> 
> Yeah, I'm not sure.. why duplicate information already present in
> kallsyms?

Well, but it's not exactly duplicating kallsyms.  No need to store
symbol names, just the pointer relationships.  And kallsyms is
presumably slow.

> There's a fair number of features that already require KALLSYMS, I can't
> really be bothered about adding one more (kprobes, function_tracer,
> stack_tracer, ftrace_syscalls).

Right, but I don't think they rely on KALLSYMS_ALL?

-- 
Josh