Re: hmm_test issues with latest mainline

On Thu, Oct 13, 2022 at 06:54:24PM +0200, Vlastimil Babka wrote:

Hi,

I've been trying the hmm_tests as of today's commit:

a185a0995518 ("Merge tag 'linux-kselftest-kunit-6.1-rc1-2' ...)

and run into several issues that seemed worth reporting.

First, it seems the FIXTURE_TEARDOWN(hmm) in tools/testing/selftests/vm/hmm-tests.c using ASSERT_EQ(ret, 0); can run into an infinite loop of reporting the assertion failure. Dunno if it's a kselftests issue or it's a bug to use asserts in teardown. I hacked it up like this locally to proceed:

I've seen this too in other tests, it is a kselftests bug/limitation, AFAIK. You can't use assert macros in those functions.

Jason