Messages in this thread | | | Date | Thu, 28 Sep 2017 10:49:41 +0200 | From | Ingo Molnar <> | Subject | Re: [lkp-robot] [x86/asm] f5caf621ee: PANIC:double_fault |
| |
* Peter Zijlstra <peterz@infradead.org> wrote:
> On Thu, Sep 28, 2017 at 09:59:07AM +0200, Ingo Molnar wrote: > > > > * kernel test robot <xiaolong.ye@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.
Of course! I just mean I'd not be surprised if this was a GCC bug/quirk with legacy GCC versions that probably won't be fixed.
Thanks,
Ingo
| |