On Mon, Jul 13, 2020 at 04:32:39PM -0400, Steven Rostedt wrote:
> On Sat, 11 Jul 2020 12:49:30 +0200
> Peter Zijlstra wrote:
> >
> > Something like so (on top of the next patch) ?
> >
> > I'm not convinced it actually helps much, but if it makes you feel
> > better :-)
>
> After you have
On Sat, 11 Jul 2020 12:49:30 +0200
Peter Zijlstra wrote:
>
> Something like so (on top of the next patch) ?
>
> I'm not convinced it actually helps much, but if it makes you feel
> better :-)
After you have bricked a bunch of people's NICs, you would be paranoid
about this too!
You work for
On Fri, Jul 10, 2020 at 07:08:25PM -0400, Steven Rostedt wrote:
> On Fri, 10 Jul 2020 15:38:44 +0200
> Peter Zijlstra wrote:
>
> > +static void __static_call_transform(void *insn, enum insn_type type, void
> > *func)
> > {
> > - const void *code = text_gen_insn(opcode, insn, func);
> > +
On Fri, Jul 10, 2020 at 07:08:25PM -0400, Steven Rostedt wrote:
> On Fri, 10 Jul 2020 15:38:44 +0200
> Peter Zijlstra wrote:
>
> > +static void __static_call_transform(void *insn, enum insn_type type, void
> > *func)
> > {
> > - const void *code = text_gen_insn(opcode, insn, func);
> > +
On Fri, 10 Jul 2020 15:38:44 +0200
Peter Zijlstra wrote:
> +static void __static_call_transform(void *insn, enum insn_type type, void
> *func)
> {
> - const void *code = text_gen_insn(opcode, insn, func);
> + int size = CALL_INSN_SIZE;
> + const void *code;
>
> - if
Extend the static_call infrastructure to optimize the following common
pattern:
if (func_ptr)
func_ptr(args...)
For the trampoline (which is in effect a tail-call), we patch the
JMP.d32 into a RET, which then directly consumes the trampoline call.
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