On Thu, Sep 28, 2017 at 09:59:07AM +0200, Ingo Molnar wrote:
>
> * kernel test robot <xiaolong...@intel.com> wrote:
>
> >
> > FYI, we noticed the following commit:
> >
> > commit: f5caf621ee357279e759c0911daf6d55c7d36f03 ("x86/asm: Fix inline asm
> > call constraints for Clang")
> > https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git master
> >
> > in testcase: trinity
> > with following parameters:
> >
> > runtime: 300s
> >
> > test-description: Trinity is a linux system call fuzz tester.
> > test-url: http://codemonkey.org.uk/projects/trinity/
> >
> >
> > on test machine: qemu-system-x86_64 -enable-kvm -m 420M
> >
> > caused below changes (please refer to attached dmesg/kmsg for entire
> > log/backtrace):
> >
> >
> > +-----------------------------------------+------------+------------+
> > | | 0d0970eef3 | f5caf621ee |
> > +-----------------------------------------+------------+------------+
> > | boot_successes | 9 | 4 |
> > | boot_failures | 0 | 4 |
> > | PANIC:double_fault | 0 | 4 |
> > | Kernel_panic-not_syncing:Machine_halted | 0 | 4 |
> > +-----------------------------------------+------------+------------+
>
> I think a key piece of information is that the test is using GCC 4.4:
>
> export compiler='gcc-4.4'
>
> ... which is pretty old compared to what gets tested typically.
>
> GCC 4.4 was released in 2009 (!), the last minor update of 4.4.7 was 5 years
> ago.
Sure, but its still an officially supported GCC version. So either it
must be made to work, or we must update the minimal GCC version
requirements for the kernel.
