linux - Linux Kernel (branches are rebased on master from time to time)

Age	Commit message (Collapse)	Author	Files	Lines
2022-10-25	selftests/bpf: Tracing prog can still do lookup under busy lock	Martin KaFai Lau	1	-3/+40
	This patch modifies the task_ls_recursion test to check that the first bpf_task_storage_get(&map_a, ...) in BPF_PROG(on_update) can still do the lockless lookup even it cannot acquire the percpu busy lock. If the lookup succeeds, it will increment the value by 1 and the value in the task storage map_a will become 200+1=201. After that, BPF_PROG(on_update) tries to delete from map_a and should get -EBUSY because it cannot acquire the percpu busy lock after finding the data. Signed-off-by: Martin KaFai Lau <martin.lau@kernel.org> Link: https://lore.kernel.org/r/20221025184524.3526117-10-martin.lau@linux.dev Signed-off-by: Alexei Starovoitov <ast@kernel.org>
2021-02-26	selftests/bpf: Test deadlock from recursive bpf_task_storage_[get\|delete]	Song Liu	1	-0/+70
	Add a test with recursive bpf_task_storage_[get\|delete] from fentry programs on bpf_local_storage_lookup and bpf_local_storage_update. Without proper deadlock prevent mechanism, this test would cause deadlock. Signed-off-by: Song Liu <songliubraving@fb.com> Signed-off-by: Alexei Starovoitov <ast@kernel.org> Link: https://lore.kernel.org/bpf/20210225234319.336131-5-songliubraving@fb.com