From: Steven Rostedt <rostedt@goodmis.org>
To: Menglong Dong <menglong8.dong@gmail.com>
Cc: alexei.starovoitov@gmail.com, jolsa@kernel.org,
bpf@vger.kernel.org, Menglong Dong <dongml2@chinatelecom.cn>,
Mark Rutland <mark.rutland@arm.com>,
Mathieu Desnoyers <mathieu.desnoyers@efficios.com>,
linux-kernel@vger.kernel.org, linux-trace-kernel@vger.kernel.org
Subject: Re: [PATCH bpf-next v2 04/18] ftrace: add reset_ftrace_direct_ips
Date: Mon, 7 Jul 2025 14:52:28 -0400 [thread overview]
Message-ID: <20250707145228.43c669f6@batman.local.home> (raw)
In-Reply-To: <CADxym3YaHGxQ7AORGka1CV+KpnPOknohP9a6zi=3RSPXYBKC-g@mail.gmail.com>
On Fri, 4 Jul 2025 09:54:52 +0800
Menglong Dong <menglong8.dong@gmail.com> wrote:
> > What exactly do you mean by "reset"?
>
> It means to reset the filter hash of the ftrace_ops to ips. In
> the origin logic, the filter hash of a direct ftrace_ops will not
> be changed. However, in the tracing-multi case, there are
> multi functions in the filter hash and can change. This function
> is used to change the filter hash of a direct ftrace_ops.
The above still doesn't make sense to me.
Can you explain more what exactly you are doing at a higher level? To
me "reset" means to set back to what it originally was (which usually
is zero or nothing).
-- Steve
next prev parent reply other threads:[~2025-07-07 18:52 UTC|newest]
Thread overview: 73+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <20250703121521.1874196-1-dongml2@chinatelecom.cn>
2025-07-03 12:15 ` [PATCH bpf-next v2 01/18] bpf: add function hash table for tracing-multi Menglong Dong
2025-07-04 16:07 ` kernel test robot
2025-07-15 1:55 ` Alexei Starovoitov
2025-07-15 2:37 ` Menglong Dong
2025-07-15 2:49 ` Alexei Starovoitov
2025-07-15 3:13 ` Menglong Dong
2025-07-15 9:06 ` Menglong Dong
2025-07-15 16:22 ` Alexei Starovoitov
2025-07-03 12:15 ` [PATCH bpf-next v2 02/18] x86,bpf: add bpf_global_caller for global trampoline Menglong Dong
2025-07-15 2:25 ` Alexei Starovoitov
2025-07-15 8:36 ` Menglong Dong
2025-07-15 9:30 ` Menglong Dong
2025-07-16 16:56 ` Inlining migrate_disable/enable. Was: " Alexei Starovoitov
2025-07-16 18:24 ` Peter Zijlstra
2025-07-16 22:35 ` Alexei Starovoitov
2025-07-16 22:49 ` Steven Rostedt
2025-07-16 22:50 ` Steven Rostedt
2025-07-28 9:20 ` Menglong Dong
2025-07-31 16:15 ` Alexei Starovoitov
2025-08-01 1:42 ` Menglong Dong
2025-08-06 8:44 ` Menglong Dong
2025-08-08 0:58 ` Alexei Starovoitov
2025-08-08 5:48 ` Menglong Dong
2025-08-08 6:32 ` Menglong Dong
2025-08-08 15:47 ` Alexei Starovoitov
2025-07-15 16:35 ` Alexei Starovoitov
2025-07-16 13:05 ` Menglong Dong
2025-07-17 0:59 ` multi-fentry proposal. Was: " Alexei Starovoitov
2025-07-17 1:50 ` Menglong Dong
2025-07-17 2:13 ` Alexei Starovoitov
2025-07-17 2:37 ` Menglong Dong
2025-07-16 14:40 ` Menglong Dong
2025-07-03 12:15 ` [PATCH bpf-next v2 03/18] ftrace: factor out ftrace_direct_update from register_ftrace_direct Menglong Dong
2025-07-05 2:41 ` kernel test robot
2025-07-03 12:15 ` [PATCH bpf-next v2 04/18] ftrace: add reset_ftrace_direct_ips Menglong Dong
2025-07-03 15:30 ` Steven Rostedt
2025-07-04 1:54 ` Menglong Dong
2025-07-07 18:52 ` Steven Rostedt [this message]
2025-07-08 1:26 ` Menglong Dong
2025-07-03 12:15 ` [PATCH bpf-next v2 05/18] bpf: introduce bpf_gtramp_link Menglong Dong
2025-07-04 7:00 ` kernel test robot
2025-07-04 7:52 ` kernel test robot
2025-07-03 12:15 ` [PATCH bpf-next v2 06/18] bpf: tracing: add support to record and check the accessed args Menglong Dong
2025-07-14 22:07 ` Andrii Nakryiko
2025-07-14 23:45 ` Menglong Dong
2025-07-15 17:11 ` Andrii Nakryiko
2025-07-16 12:50 ` Menglong Dong
2025-07-03 12:15 ` [PATCH bpf-next v2 07/18] bpf: refactor the modules_array to ptr_array Menglong Dong
2025-07-03 12:15 ` [PATCH bpf-next v2 08/18] bpf: verifier: add btf to the function args of bpf_check_attach_target Menglong Dong
2025-07-03 12:15 ` [PATCH bpf-next v2 09/18] bpf: verifier: move btf_id_deny to bpf_check_attach_target Menglong Dong
2025-07-03 12:15 ` [PATCH bpf-next v2 10/18] x86,bpf: factor out arch_bpf_get_regs_nr Menglong Dong
2025-07-03 12:15 ` [PATCH bpf-next v2 11/18] bpf: tracing: add multi-link support Menglong Dong
2025-07-03 12:15 ` [PATCH bpf-next v2 12/18] libbpf: don't free btf if tracing_multi progs existing Menglong Dong
2025-07-14 22:07 ` Andrii Nakryiko
2025-07-15 1:15 ` Menglong Dong
2025-07-03 12:15 ` [PATCH bpf-next v2 13/18] libbpf: support tracing_multi Menglong Dong
2025-07-14 22:07 ` Andrii Nakryiko
2025-07-15 1:58 ` Menglong Dong
2025-07-15 17:20 ` Andrii Nakryiko
2025-07-16 12:43 ` Menglong Dong
2025-07-03 12:15 ` [PATCH bpf-next v2 14/18] libbpf: add btf type hash lookup support Menglong Dong
2025-07-14 22:07 ` Andrii Nakryiko
2025-07-15 4:40 ` Menglong Dong
2025-07-15 17:20 ` Andrii Nakryiko
2025-07-16 11:53 ` Menglong Dong
2025-07-03 12:15 ` [PATCH bpf-next v2 15/18] libbpf: add skip_invalid and attach_tracing for tracing_multi Menglong Dong
2025-07-14 22:07 ` Andrii Nakryiko
2025-07-15 5:48 ` Menglong Dong
2025-07-15 17:23 ` Andrii Nakryiko
2025-07-16 11:46 ` Menglong Dong
2025-07-03 12:15 ` [PATCH bpf-next v2 16/18] selftests/bpf: move get_ksyms and get_addrs to trace_helpers.c Menglong Dong
2025-07-03 12:15 ` [PATCH bpf-next v2 17/18] selftests/bpf: add basic testcases for tracing_multi Menglong Dong
2025-07-03 12:15 ` [PATCH bpf-next v2 18/18] selftests/bpf: add bench tests " Menglong Dong
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