diff options
| author | Hou Tao <[email protected]> | 2022-10-14 19:39:46 +0800 |
|---|---|---|
| committer | Alexei Starovoitov <[email protected]> | 2022-10-18 10:27:02 -0700 |
| commit | 4835f9ee980c1867584018e69cbf1f62d7844cb3 (patch) | |
| tree | e2b8022025e270d1f39a04f592dbdd468be80f94 /tools/testing/selftests/bpf/prog_tests/prog_array_init.c | |
| parent | d39d1445d37747032e2b26732fed6fe25161cd36 (diff) | |
bpf: Use rcu_trace_implies_rcu_gp() for program array freeing
To support both sleepable and normal uprobe bpf program, the freeing of
trace program array chains a RCU-tasks-trace grace period and a normal
RCU grace period one after the other.
With the introduction of rcu_trace_implies_rcu_gp(),
__bpf_prog_array_free_sleepable_cb() can check whether or not a normal
RCU grace period has also passed after a RCU-tasks-trace grace period
has passed. If it is true, it is safe to invoke kfree() directly.
Signed-off-by: Hou Tao <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Alexei Starovoitov <[email protected]>
Diffstat (limited to 'tools/testing/selftests/bpf/prog_tests/prog_array_init.c')
0 files changed, 0 insertions, 0 deletions