On 6/15/26 8:05 PM, Harry Yoo (Oracle) wrote: > slub_kunit uses hardware perf events to invoke _nolock() APIs from NMI > context. However, creating a HW perf event fails when there is no > hardware PMU, or when running in a virtualized environment without a > virtual PMU configured. > > Since tests are often performed in virtualized environments, fall back > to a SW perf event so that the test can still run, even if it cannot > cover IRQ-disabled sections. > > For the sheaves path, IRQs are not disabled until the barn is accessed. > So some coverage is still expected. > > Signed-off-by: Harry Yoo (Oracle) <[email protected]> > --- > lib/tests/slub_kunit.c | 70 > +++++++++++++++++++++++++++++++++++++++----------- > 1 file changed, 55 insertions(+), 15 deletions(-) > > diff --git a/lib/tests/slub_kunit.c b/lib/tests/slub_kunit.c > index fa6d31dbca16..11255fc8eb78 100644 > --- a/lib/tests/slub_kunit.c > +++ b/lib/tests/slub_kunit.c > @@ -303,6 +303,7 @@ struct test_nolock_context { > int alloc_ok; > int alloc_fail; > struct perf_event *event; > + bool is_perf_type_hw; > };
nit: should have checked struct perf_event.type instead of introducing a new field. Will fix. -- Cheers, Harry / Hyeonggon
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