On Thu, Jun 11, 2015 at 08:08:07AM +0200, Ingo Molnar wrote: > > * Josh Poimboeuf <jpoimboe@xxxxxxxxxx> wrote: > > > I should also mention that my proposed ia32_ptregs_common patch, which > > duplicated the needed code, was more optimized for performance than code size. > > > > But if you're more worried about code size, we could turn ia32_ptregs_common > > into a proper callable function, and then replace > > > > jmp ia32_ptregs_common > > > > with: > > > > call ia32_ptregs_common > > ret > > > > So it becomes a regular call instead of a tail call. It only adds a few > > instructions and the function is self-contained. Would that be good enough? > > No, debug info should not slow down the kernel, especially not code we write in > assembly partly for performance. Ok. I'll work on adding support for external jumps. -- Josh -- To unsubscribe from this list: send the line "unsubscribe live-patching" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
