Re: [PATCH V2 0/3] kprobe: Optimize the performance of patching ss

[Google]

On Tue, 13 Sep 2022 11:34:51 +0800
Liao Chang <liaochang1@xxxxxxxxxx> wrote:

> Single-step slot would not be used until kprobe is enabled, that means
> no race condition occurs on it under SMP, hence it is safe to pacth ss
> slot without stopping machine.

All these patches look good to me, since single-step slot must not
be executed until it is prepared.

Acked-by: Masami Hiramatsu (Google) <mhiramat@xxxxxxxxxx>
for this series.

But I need Ack by each architecture maintainer.

Thank you,

> 
> v2:
> Backport riscv patch to cksy and arm64.
> 
> Liao Chang (3):
>   riscv/kprobe: Optimize the performance of patching single-step slot
>   csky/kprobe: Optimize the performance of patching single-step slot
>   arm64/kprobe: Optimize the performance of patching single-step slot
> 
>  arch/arm64/kernel/probes/kprobes.c | 5 ++---
>  arch/csky/kernel/probes/kprobes.c  | 6 +++++-
>  arch/riscv/kernel/probes/kprobes.c | 8 +++++---
>  3 files changed, 12 insertions(+), 7 deletions(-)
> 
> -- 
> 2.17.1
> 


-- 
Masami Hiramatsu (Google) <mhiramat@xxxxxxxxxx>