selftests/bpf: Add a test for kmem_cache_iter

Browse source

The test traverses all slab caches using the kmem_cache_iter and save
the data into slab_result array map.  And check if current task's
pointer is from "task_struct" slab cache using bpf_get_kmem_cache().

Also compare the result array with /proc/slabinfo if available (when
CONFIG_SLUB_DEBUG is on).  Note that many of the fields in the slabinfo
are transient, so it only compares the name and objsize fields.

Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Link: https://lore.kernel.org/r/20241010232505.1339892-4-namhyung@kernel.org
Signed-off-by: Alexei Starovoitov <ast@kernel.org>

...

This commit is contained in:

Namhyung Kim 2024-10-10 16:25:05 -07:00 • committed by Alexei Starovoitov

parent a992d7a397

commit a496d0cdc8

3 changed files with 209 additions and 0 deletions

Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL

Download patch file Download diff file Expand all files Collapse all files

115

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

View file

7

tools/testing/selftests/bpf/progs/bpf_iter.h

View file

87

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

View file