Re: [PATCH 3/3] arm64/kprobe: Optimize the performance of patching single-step slot

[Catalin Marinas]

On Tue, Sep 27, 2022 at 10:24:35AM +0800, Liao Chang 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.
> 
> Since I and D caches are coherent within single-step slot from
> aarch64_insn_patch_text_nosync(), hence no need to do it again via
> flush_icache_range().
> 
> Acked-by: Will Deacon <will@xxxxxxxxxx>
> Acked-by: Masami Hiramatsu (Google) <mhiramat@xxxxxxxxxx>
> Signed-off-by: Liao Chang <liaochang1@xxxxxxxxxx>
> ---
>  arch/arm64/kernel/probes/kprobes.c | 27 +++++++++++++++++++++------
>  1 file changed, 21 insertions(+), 6 deletions(-)

What's your expectation with this series, should the arch maintainers
just pick the individual patches?

-- 
Catalin