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Date: Tue, 13 Feb 2024 13:58:37 +0100
From: Andrea Parri <parri.andrea@gmail.com>
To: Samuel Holland <samuel.holland@sifive.com>
Cc: Palmer Dabbelt <palmer@dabbelt.com>, linux-riscv@lists.infradead.org,
	linux-kernel@vger.kernel.org, Ard Biesheuvel <ardb@kernel.org>,
	Daniel Borkmann <daniel@iogearbox.net>,
	Jason Baron <jbaron@akamai.com>,
	Josh Poimboeuf <jpoimboe@kernel.org>,
	Peter Zijlstra <peterz@infradead.org>,
	Steven Rostedt <rostedt@goodmis.org>, bpf@vger.kernel.org,
	Alexandre Ghiti <alexghiti@rivosinc.com>,
	=?iso-8859-1?Q?Bj=F6rn_T=F6pel?= <bjorn@rivosinc.com>
Subject: Re: [PATCH 0/7] riscv: Various text patching improvements
Message-ID: <ZctnfZWWO3HCiXe5@andrea>
References: <20240212025529.1971876-1-samuel.holland@sifive.com>
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In-Reply-To: <20240212025529.1971876-1-samuel.holland@sifive.com>

Hi Samuel,

On Sun, Feb 11, 2024 at 06:55:11PM -0800, Samuel Holland wrote:
> Here are a few changes to minimize calls to stop_machine() and
> flush_icache_*() in the various text patching functions, as well as
> to simplify the code.
> 
> 
> Samuel Holland (7):
>   riscv: jump_label: Batch icache maintenance
>   riscv: jump_label: Simplify assembly syntax
>   riscv: kprobes: Use patch_text_nosync() for insn slots
>   riscv: Simplify text patching loops
>   riscv: Pass patch_text() the length in bytes
>   riscv: Use offset_in_page() in text patching functions
>   riscv: Remove extra variable in patch_text_nosync()

This does look like a nice clean-up.  Just curious (a "teach me"-like question),
how did you test these changes? kselftests, micro-benchmarks, other?

BTW, I recall a parallel work from Alex and Bjorn [1] that might have some minor
conflict with these changes; + both of them to Cc: for further sync.

  Andrea

[1] https://lore.kernel.org/lkml/20240206204607.527195-1-alexghiti@rivosinc.com/