Niklas Söderlund bc2c4dc5b5 samples/bpf, xdpsock: Fix race when running for fix duration of time ... [ Upstream commit 8fa42d78f6 ] When running xdpsock for a fix duration of time before terminating using --duration=<n>, there is a race condition that may cause xdpsock to terminate immediately. When running for a fixed duration of time the check to determine when to terminate execution is in is_benchmark_done() and is being executed in the context of the poller thread, if (opt_duration > 0) { unsigned long dt = (get_nsecs() - start_time); if (dt >= opt_duration) benchmark_done = true; } However start_time is only set after the poller thread have been created. This leaves a small window when the poller thread is starting and calls is_benchmark_done() for the first time that start_time is not yet set. In that case start_time have its initial value of 0 and the duration check fails as it do not correlate correctly for the applications start time and immediately sets benchmark_done which in turn terminates the xdpsock application. Fix this by setting start_time before creating the poller thread. Fixes: d3f11b018f ("samples/bpf: xdpsock: Add duration option to specify how long to run") Signed-off-by: Niklas Söderlund <niklas.soderlund@corigine.com> Signed-off-by: Simon Horman <simon.horman@corigine.com> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net> Link: https://lore.kernel.org/bpf/20220315102948.466436-1-niklas.soderlund@corigine.com Signed-off-by: Sasha Levin <sashal@kernel.org>		2022-04-08 14:23:40 +02:00
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acrn	…
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bpf	samples/bpf, xdpsock: Fix race when running for fix duration of time	2022-04-08 14:23:40 +02:00
configfs	…
connector	…
ftrace	ftrace/samples: Add missing prototypes direct functions	2022-01-11 15:35:13 +01:00
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kprobes	samples/kretprobes: Fix return value if register_kretprobe() failed	2021-11-18 19:16:42 +01:00
landlock	samples/landlock: Fix path_list memory leak	2022-04-08 14:22:59 +02:00
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