[linux-next:master] [KVM] 377b2f359d: kvm-unit-tests-qemu.vmx.fail

[linux-next:master] [KVM] 377b2f359d: kvm-unit-tests-qemu.vmx.fail

[kernel test robot]

Hello,

kernel test robot noticed "kvm-unit-tests-qemu.vmx.fail" on:

commit: 377b2f359d1f71c75f8cc352b5c81f2210312d83 ("KVM: VMX: Always honor guest PAT on CPUs that support self-snoop")
https://git.kernel.org/cgit/linux/kernel/git/next/linux-next.git master

[test failed on linux-next/master 6906a84c482f098d31486df8dc98cead21cce2d0]

in testcase: kvm-unit-tests-qemu
version: 
with following parameters:




compiler: gcc-13
test machine: 128 threads 2 sockets Intel(R) Xeon(R) Platinum 8358 CPU @ 2.60GHz (Ice Lake) with 128G 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/202406141424.5053d640-oliver.sang@intel.com


^[[31mFAIL^[[0m vmx (65128 tests, 2 unexpected failures, 2 expected failures, 5 skipped)


as a comparison, on parent, we observed


^[[32mPASS^[[0m vmx (430039 tests, 2 expected failures, 5 skipped)



The kernel config and materials to reproduce are available at:
https://download.01.org/0day-ci/archive/20240614/202406141424.5053d640-oliver.sang@intel.com



-- 
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki

Re: [linux-next:master] [KVM] 377b2f359d: kvm-unit-tests-qemu.vmx.fail

[Sean Christopherson]

On Fri, Jun 14, 2024, kernel test robot wrote:
> ^[[31mFAIL^[[0m vmx (65128 tests, 2 unexpected failures, 2 expected failures, 5 skipped)

This is a known issue, one of the VMX subtests clobbers PAT and causes subsequent
subtests to run with UC memory.  I'll sent a pull request to Paolo today.

https://lore.kernel.org/all/20240605224527.2907272-1-seanjc@google.com