Re: [PATCH 3/3] arm64/kprobe: Optimize the performance of patching single-step slot
From: Catalin Marinas <catalin.marinas@arm.com>
Date: 2022-09-29 16:50:57
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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@kernel.org> Acked-by: Masami Hiramatsu (Google) <mhiramat@kernel.org> Signed-off-by: Liao Chang <redacted> --- 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 _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel