From: Jiri Olsa <jolsa@kernel.org>
To: Alexei Starovoitov <ast@kernel.org>,
Daniel Borkmann <daniel@iogearbox.net>,
Andrii Nakryiko <andrii@kernel.org>
Cc: Song Liu <song@kernel.org>,
bpf@vger.kernel.org, Martin KaFai Lau <kafai@fb.com>,
Song Liu <songliubraving@fb.com>, Yonghong Song <yhs@fb.com>,
John Fastabend <john.fastabend@gmail.com>,
KP Singh <kpsingh@chromium.org>,
Stanislav Fomichev <sdf@google.com>, Hao Luo <haoluo@google.com>,
Hou Tao <houtao1@huawei.com>, Daniel Xu <dxu@dxuuu.xyz>
Subject: [PATCHv3 bpf-next 1/9] bpf: Count stats for kprobe_multi programs
Date: Wed, 20 Sep 2023 23:31:37 +0200 [thread overview]
Message-ID: <20230920213145.1941596-2-jolsa@kernel.org> (raw)
In-Reply-To: <20230920213145.1941596-1-jolsa@kernel.org>
Adding support to gather missed stats for kprobe_multi
programs due to bpf_prog_active protection.
Reviewed-and-tested-by: Song Liu <song@kernel.org>
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
---
kernel/trace/bpf_trace.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/kernel/trace/bpf_trace.c b/kernel/trace/bpf_trace.c
index a7264b2c17ad..279a3d370812 100644
--- a/kernel/trace/bpf_trace.c
+++ b/kernel/trace/bpf_trace.c
@@ -2710,6 +2710,7 @@ kprobe_multi_link_prog_run(struct bpf_kprobe_multi_link *link,
int err;
if (unlikely(__this_cpu_inc_return(bpf_prog_active) != 1)) {
+ bpf_prog_inc_misses_counter(link->link.prog);
err = 0;
goto out;
}
--
2.41.0
next prev parent reply other threads:[~2023-09-20 21:32 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-09-20 21:31 [PATCHv3 bpf-next 0/9] bpf: Add missed stats for kprobes Jiri Olsa
2023-09-20 21:31 ` Jiri Olsa [this message]
2023-09-20 21:31 ` [PATCHv3 bpf-next 2/9] bpf: Add missed value to kprobe_multi link info Jiri Olsa
2023-09-21 18:52 ` Song Liu
2023-09-23 8:21 ` Jiri Olsa
2023-09-20 21:31 ` [PATCHv3 bpf-next 3/9] bpf: Add missed value to kprobe perf " Jiri Olsa
2023-09-20 21:31 ` [PATCHv3 bpf-next 4/9] bpf: Count missed stats in trace_call_bpf Jiri Olsa
2023-09-20 21:31 ` [PATCHv3 bpf-next 5/9] bpftool: Display missed count for kprobe_multi link Jiri Olsa
2023-09-20 21:31 ` [PATCHv3 bpf-next 6/9] bpftool: Display missed count for kprobe perf link Jiri Olsa
2023-09-20 21:31 ` [PATCHv3 bpf-next 7/9] selftests/bpf: Add test for missed counts of perf event link kprobe Jiri Olsa
2023-09-20 21:31 ` [PATCHv3 bpf-next 8/9] selftests/bpf: Add test for recursion " Jiri Olsa
2023-09-20 21:31 ` [PATCHv3 bpf-next 9/9] selftests/bpf: Add test for recursion counts of perf event link tracepoint Jiri Olsa
2023-09-25 23:50 ` [PATCHv3 bpf-next 0/9] bpf: Add missed stats for kprobes patchwork-bot+netdevbpf
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