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

[liaochang (A)]

在 2022/9/30 0:50, Catalin Marinas 写道:
> 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 at kernel.org>
>> Acked-by: Masami Hiramatsu (Google) <mhiramat at kernel.org>
>> Signed-off-by: Liao Chang <liaochang1 at huawei.com>
>> ---
>>  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?

Yes, or should i split this series into individual patch?

Thanks.

> 

-- 
BR,
Liao, Chang