Andrii Nakryiko 11b844b0b7 selftests/bpf: Work-around EBUSY errors from hashmap update/delete ... 20b6cc34ea ("bpf: Avoid hashtab deadlock with map_locked") introduced a possibility of getting EBUSY error on lock contention, which seems to happen very deterministically in test_maps when running 1024 threads on low-CPU machine. In libbpf CI case, it's a 2 CPU VM and it's hitting this 100% of the time. Work around by retrying on EBUSY (and EAGAIN, while we are at it) after a small sleep. sched_yield() is too agressive and fails even after 20 retries, so I went with usleep(1) for backoff. Also log actual error returned to make it easier to see what's going on. Fixes: 20b6cc34ea ("bpf: Avoid hashtab deadlock with map_locked") Signed-off-by: Andrii Nakryiko <andrii@kernel.org> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net> Acked-by: Song Liu <songliubraving@fb.com> Link: https://lore.kernel.org/bpf/20201223200652.3417075-1-andrii@kernel.org		2020-12-24 01:35:46 +01:00
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fault-injection
ktest	ktest.pl: Fix incorrect reboot for grub2bls	2020-11-30 16:29:40 -05:00
kunit	kunit: tool: fix extra trailing \n in raw + parsed test output	2020-11-10 13:44:35 -07:00
nvdimm	x86, libnvdimm/test: Remove COPY_MC_TEST	2020-10-26 18:08:35 +01:00
radix-tree	ida: Free allocated bitmap in error path	2020-10-07 09:11:33 -04:00
scatterlist	drm for 5.11-rc1	2020-12-14 11:07:56 -08:00
selftests	selftests/bpf: Work-around EBUSY errors from hashmap update/delete	2020-12-24 01:35:46 +01:00
vsock	SPDX patches for 5.7-rc1.	2020-04-03 13:12:26 -07:00