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Wed, 20 Aug 2025 00:26:45 -0700 (PDT) Precedence: bulk X-Mailing-List: linux-trace-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 References: <20250818103931.1100084-1-richard@nod.at> In-Reply-To: <20250818103931.1100084-1-richard@nod.at> From: Linus Walleij Date: Wed, 20 Aug 2025 09:26:34 +0200 X-Gm-Features: Ac12FXzmS-9yGVF-QG0jps5D9FFgyHp9dtJtJ14yfzuuesjlk_IGoKkXWSgMngU Message-ID: Subject: Re: [PATCH] ARM: ftrace: Implement HAVE_FUNCTION_GRAPH_FREGS To: Richard Weinberger Cc: linux@armlinux.org.uk, rostedt@goodmis.org, mhiramat@kernel.org, mark.rutland@arm.com, ardb@kernel.org, ebiggers@kernel.org, nathan@kernel.org, dave@vasilevsky.ca, ruanjinjie@huawei.com, liuyuntao12@huawei.com, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, linux-trace-kernel@vger.kernel.org, Donglin Peng Content-Type: text/plain; charset="UTF-8" Unsolicited thread intervention: Richard if you use ftrace on ARM a lot, have you looked into patchable function entry as described by Mark Rutland for ARM64 in this talk? https://www.youtube.com/watch?v=p9cqUTF4I0w (Described at 19:12 into the talk.) I think it would be neat if we could do this on ARM32 as well but I do not know how hard it would be. Yours, Linus Walleij