Re: [linus:master] [sched/core] 704069649b: kernel-selftests.kvm.hardware_disable_test.fail

[Peter Zijlstra <peterz@infradead.org>]

On Thu, Feb 12, 2026 at 10:08:04PM +0800, kernel test robot wrote:
> 
> 
> Hello,
> 
> we found the kernel-selftests.kvm.hardware_disable_test failed consistently upon
> this commit but pass on parent. unfortunately, we didn't find many useful
> information in dmesg. this report is just FYI what we observed in our tests.
> 
> 
> 
> kernel test robot noticed "kernel-selftests.kvm.hardware_disable_test.fail" on:

With the caveat of PEBKAC (it is Friday after all); I can't reproduce.

That is, ./hardware_disable_test as build from cee73b1e840c, doesn't
work for me on 704069649b5b^1 either.

Sean; is there a magic trick to operating that test, or is it a known
trouble spot?

> 
> commit: 704069649b5bfb7bf1fe32c0281fe9036806a59a ("sched/core: Rework sched_class::wakeup_preempt() and rq_modified_*()")
> https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git master
> 
> 
> in testcase: kernel-selftests
> version: kernel-selftests-x86_64-05f7e89ab973-1_20260208
> with following parameters:
> 
> 	group: kvm
> 
> 
> 
> config: x86_64-rhel-9.4-kselftests
> compiler: gcc-14
> test machine: 224 threads 2 sockets Intel(R) Xeon(R) Platinum 8480+ (Sapphire Rapids) with 256G memory
> 
> (please refer to attached dmesg/kmsg for entire log/backtrace)
> 
> 
> If you fix the issue in a separate patch/commit (i.e. not just a new version of
> the same patch/commit), kindly add following tags
> | Reported-by: kernel test robot <oliver.sang@intel.com>
> | Closes: https://lore.kernel.org/oe-lkp/202602122157.4e861298-lkp@intel.com
> 
> 
> 
> # timeout set to 120
> # selftests: kvm: hardware_disable_test
> # Random seed: 0x6b8b4567
> #
> not ok 85 selftests: kvm: hardware_disable_test # TIMEOUT 120 seconds
> /bin/sh: 50: cannot create : Directory nonexistent
> 
> 
> 
> The kernel config and materials to reproduce are available at:
> https://download.01.org/0day-ci/archive/20260212/202602122157.4e861298-lkp@intel.com
> 
> 
> 
> -- 
> 0-DAY CI Kernel Test Service
> https://github.com/intel/lkp-tests/wiki
>