From: Masami Hiramatsu (Google) <mhiramat@kernel.org>
To: Heiko Carstens <hca@linux.ibm.com>
Cc: Steven Rostedt <rostedt@goodmis.org>,
Sven Schnelle <svens@linux.ibm.com>,
Alexei Starovoitov <alexei.starovoitov@gmail.com>,
Florent Revest <revest@chromium.org>,
linux-trace-kernel@vger.kernel.org,
LKML <linux-kernel@vger.kernel.org>,
Martin KaFai Lau <martin.lau@linux.dev>,
bpf <bpf@vger.kernel.org>, Alexei Starovoitov <ast@kernel.org>,
Jiri Olsa <jolsa@kernel.org>,
Alan Maguire <alan.maguire@oracle.com>,
Mark Rutland <mark.rutland@arm.com>,
linux-arch@vger.kernel.org,
Catalin Marinas <catalin.marinas@arm.com>,
Will Deacon <will@kernel.org>,
Huacai Chen <chenhuacai@kernel.org>,
WANG Xuerui <kernel@xen0n.name>,
Michael Ellerman <mpe@ellerman.id.au>,
Nicholas Piggin <npiggin@gmail.com>,
Christophe Leroy <christophe.leroy@csgroup.eu>,
Naveen N Rao <naveen@kernel.org>,
Madhavan Srinivasan <maddy@linux.ibm.com>,
Paul Walmsley <paul.walmsley@sifive.com>,
Palmer Dabbelt <palmer@dabbelt.com>,
Albert Ou <aou@eecs.berkeley.edu>,
Vasily Gorbik <gor@linux.ibm.com>,
Alexander Gordeev <agordeev@linux.ibm.com>,
Christian Borntraeger <borntraeger@linux.ibm.com>,
Thomas Gleixner <tglx@linutronix.de>,
Ingo Molnar <mingo@redhat.com>, Borislav Petkov <bp@alien8.de>,
Dave Hansen <dave.hansen@linux.intel.com>,
x86@kernel.org, "H. Peter Anvin" <hpa@zytor.com>,
Mathieu Desnoyers <mathieu.desnoyers@efficios.com>,
Andrew Morton <akpm@linux-foundation.org>
Subject: Re: [PATCH v17 11/16] fprobe: Rewrite fprobe on function-graph tracer
Date: Tue, 22 Oct 2024 18:00:48 +0900 [thread overview]
Message-ID: <20241022180048.989a3470b23ed34d048b246a@kernel.org> (raw)
In-Reply-To: <20241021163139.6950-F-hca@linux.ibm.com>
On Mon, 21 Oct 2024 18:31:39 +0200
Heiko Carstens <hca@linux.ibm.com> wrote:
> > > Please note that this only works for addresses in the kernel address
> > > space. For user space the full 64 bit address range (minus the top
> > > page) can be used for user space applications.
> >
> > I wonder what is the unsigned long size (stack entry size) of the
> > s390? is it 64bit?
>
> The s390 kernel is 64 bit only. So unsigned long is 64 bit as well.
>
Ah, got it.
> > > I'm just writing this
> > > here, just in case something like this comes up for uprobes or
> > > something similar as well.
> >
> > I'm considering another solution if it doesn't work. Of course if
> > above works, it is the best compression ratio.
>
> I'm think we are not talking about uprobes here, and everything ftrace
> related would just work (tm) with the first four MSBs assumed to be
> zero.
yeah, but we still have other 32bit architectures support (e.g. i386, arm).
Thank you,
--
Masami Hiramatsu (Google) <mhiramat@kernel.org>
next prev parent reply other threads:[~2024-10-22 9:00 UTC|newest]
Thread overview: 38+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-10-16 0:57 [PATCH v17 00/16] tracing: fprobe: function_graph: Multi-function graph and fprobe on fgraph Masami Hiramatsu (Google)
2024-10-16 0:57 ` [PATCH v17 01/16] function_graph: Pass ftrace_regs to entryfunc Masami Hiramatsu (Google)
2024-10-16 13:53 ` Steven Rostedt
2024-10-16 22:15 ` Masami Hiramatsu
2024-10-21 17:03 ` Will Deacon
2024-10-22 22:55 ` Masami Hiramatsu
2024-10-16 0:58 ` [PATCH v17 02/16] function_graph: Replace fgraph_ret_regs with ftrace_regs Masami Hiramatsu (Google)
2024-10-21 16:46 ` Will Deacon
2024-10-23 8:58 ` Masami Hiramatsu
2024-10-16 0:58 ` [PATCH v17 03/16] function_graph: Pass ftrace_regs to retfunc Masami Hiramatsu (Google)
2024-10-16 0:58 ` [PATCH v17 04/16] fprobe: Use ftrace_regs in fprobe entry handler Masami Hiramatsu (Google)
2024-10-16 0:58 ` [PATCH v17 05/16] fprobe: Use ftrace_regs in fprobe exit handler Masami Hiramatsu (Google)
2024-10-16 0:59 ` [PATCH v17 06/16] tracing: Add ftrace_partial_regs() for converting ftrace_regs to pt_regs Masami Hiramatsu (Google)
2024-10-21 16:46 ` Will Deacon
2024-10-23 8:57 ` Masami Hiramatsu
2024-10-16 0:59 ` [PATCH v17 07/16] tracing: Add ftrace_fill_perf_regs() for perf event Masami Hiramatsu (Google)
2024-10-21 17:01 ` Will Deacon
2024-10-23 8:58 ` Masami Hiramatsu
2024-10-16 0:59 ` [PATCH v17 08/16] tracing/fprobe: Enable fprobe events with CONFIG_DYNAMIC_FTRACE_WITH_ARGS Masami Hiramatsu (Google)
2024-10-16 0:59 ` [PATCH v17 09/16] bpf: Enable kprobe_multi feature if CONFIG_FPROBE is enabled Masami Hiramatsu (Google)
2024-10-16 0:59 ` [PATCH v17 10/16] ftrace: Add CONFIG_HAVE_FTRACE_GRAPH_FUNC Masami Hiramatsu (Google)
2024-10-16 1:00 ` [PATCH v17 11/16] fprobe: Rewrite fprobe on function-graph tracer Masami Hiramatsu (Google)
2024-10-16 12:07 ` Sven Schnelle
2024-10-16 14:10 ` Steven Rostedt
2024-10-16 18:13 ` Sven Schnelle
2024-10-17 21:10 ` Steven Rostedt
2024-10-18 12:49 ` Heiko Carstens
2024-10-21 15:15 ` Masami Hiramatsu
2024-10-21 16:31 ` Heiko Carstens
2024-10-22 9:00 ` Masami Hiramatsu [this message]
2024-10-16 14:46 ` Masami Hiramatsu
2024-10-16 18:14 ` Sven Schnelle
2024-10-18 0:45 ` Masami Hiramatsu
2024-10-16 1:00 ` [PATCH v17 12/16] tracing/fprobe: Remove nr_maxactive from fprobe Masami Hiramatsu (Google)
2024-10-16 1:00 ` [PATCH v17 13/16] selftests: ftrace: Remove obsolate maxactive syntax check Masami Hiramatsu (Google)
2024-10-16 1:00 ` [PATCH v17 14/16] selftests/ftrace: Add a test case for repeating register/unregister fprobe Masami Hiramatsu (Google)
2024-10-16 1:00 ` [PATCH v17 15/16] Documentation: probes: Update fprobe on function-graph tracer Masami Hiramatsu (Google)
2024-10-16 1:01 ` [PATCH v17 16/16] bpf: Add get_entry_ip() for arm64 Masami Hiramatsu (Google)
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