tree c1c2bdbb4b6b7174a5bbe9e4c2c1f1c0204adcb5
parent fbd97dd1d3ce32d32fb7be86acc3fdb7c04fa043
author Alexei Starovoitov <ast@kernel.org> 1790762360 +0000
committer Kumar Kartikeya Dwivedi <memxor@gmail.com> 1790872805 +0200
gpgsig -----BEGIN PGP SIGNATURE-----
 
 iHUEABYKAB0WIQR0/74CM8h5+1E9pgtHLTd7Y1QvgwUCar6M5QAKCRBHLTd7Y1Qv
 g3ajAQD3fyBj/sJJywuhj2m/4yujK9soZWDMJk6zjXUzHGRI2wEA5FIiRXjnQfWE
 6bSsRaZhQ6GZCXL+wl1ptGBu28lpPAs=
 =Gt1K
 -----END PGP SIGNATURE-----

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

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>