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Eigler) To: Masami Hiramatsu Cc: peterz@infradead.org, Ingo Molnar , linux-kernel@vger.kernel.org, Eddy_Wu@trendmicro.com, x86@kernel.org, davem@davemloft.net, rostedt@goodmis.org, naveen.n.rao@linux.ibm.com, anil.s.keshavamurthy@intel.com, linux-arch@vger.kernel.org, cameron@moodycamel.com, oleg@redhat.com, will@kernel.org, paulmck@kernel.org, systemtap@sourceware.org Subject: Re: [PATCH v5 00/21] kprobes: Unify kretprobe trampoline handlers and make kretprobe lockless References: <159870598914.1229682.15230803449082078353.stgit@devnote2> <20200901190808.GK29142@worktop.programming.kicks-ass.net> <20200902093739.8bd13603380951eaddbcd8a5@kernel.org> <20200902070226.GG2674@hirez.programming.kicks-ass.net> <20200902171755.b126672093a3c5d1b3a62a4f@kernel.org> <20200902093613.GY1362448@hirez.programming.kicks-ass.net> <20200902221926.f5cae5b4ad00b8d8f9ad99c7@kernel.org> <20200902134252.GH1362448@hirez.programming.kicks-ass.net> <20200903103954.68f0c97da57b3679169ce3a7@kernel.org> <20200903110226.8963179e6a7c978e2d56c595@kernel.org> Date: Mon, 07 Sep 2020 13:44:19 -0400 In-Reply-To: <20200903110226.8963179e6a7c978e2d56c595@kernel.org> (Masami Hiramatsu's message of "Thu, 3 Sep 2020 11:02:26 +0900") Message-ID: <87eendo51o.fsf@redhat.com> User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/24.3 (gnu/linux) MIME-Version: 1.0 Content-Type: text/plain X-Scanned-By: MIMEDefang 2.79 on 10.5.11.16 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Masami Hiramatsu writes: > Sorry, for noticing this point, I Cc'd to systemtap. Is systemtap taking > care of spinlock too? On PRREMPT_RT configurations, systemtap uses the raw_spinlock_t types/functions, to keep its probe handlers as atomic as we can make them. - FChE