selftests/bpf: Add a test for objects stuck in free_by_rcu_ttrace

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Delete all elements of BPF_F_NO_PREALLOC hash map in one batch. The first
free_bulk() starts RCU tasks trace GP and the rest of the elements are
freed while it's in flight. Wait for call_rcu_ttrace_in_progress to clear
in bpf_mem_cache of every cpu and check that free_by_rcu_ttrace and
waiting_for_gp_ttrace lists are empty.

Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Link: https://lore.kernel.org/bpf/20260930095920.601738-4-alexei.starovoitov@gmail.com
Signed-off-by: Kumar Kartikeya Dwivedi <memxor@gmail.com>

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Alexei Starovoitov 2026-09-30 09:59:20 +00:00 • committed by Kumar Kartikeya Dwivedi

parent fbd97dd1d3

commit aeb709c767

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60

tools/testing/selftests/bpf/prog_tests/bpf_ma_ttrace.c

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50

tools/testing/selftests/bpf/progs/bpf_ma_ttrace.c

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