selftests/bpf: fix flaky bpf_cookie selftest #6050
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bpf_cookie can fail on perf_event_open(), when it runs after the task_work
selftest. The task_work test causes perf to lower
sysctl_perf_event_sample_rate, and bpf_cookie uses sample_freq,
which is validated against that sysctl. As a result,
perf_event_open() rejects the attr if the (now tighter) limit is
exceeded.
From perf_event_open():
if (attr.freq) {
if (attr.sample_freq > sysctl_perf_event_sample_rate)
return -EINVAL;
} else {
if (attr.sample_period & (1ULL << 63))
return -EINVAL;
}
Switch bpf_cookie to use sample_period, which is not checked against
sysctl_perf_event_sample_rate.
Signed-off-by: Mykyta Yatsenko <[email protected]>
Author
|
Upstream branch: 5e3fee3 |
Author
|
At least one diff in series https://patchwork.kernel.org/project/netdevbpf/list/?series=1006374 irrelevant now. Closing PR. |
kernel-patches-daemon-bpf-rc
bot
deleted the
series/1006374=>bpf-net
branch
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Pull request for series with
subject: selftests/bpf: fix flaky bpf_cookie selftest
version: 2
url: https://patchwork.kernel.org/project/netdevbpf/list/?series=1006374