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Diffstat (limited to 'results/classifier/accel-gemma3:12b/kvm/842')
| -rw-r--r-- | results/classifier/accel-gemma3:12b/kvm/842 | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/results/classifier/accel-gemma3:12b/kvm/842 b/results/classifier/accel-gemma3:12b/kvm/842 new file mode 100644 index 00000000..07bf66f3 --- /dev/null +++ b/results/classifier/accel-gemma3:12b/kvm/842 @@ -0,0 +1,14 @@ + +ppc64: hard lockup / hang in Linux kernel v5.17-rc1 +Description of problem: +The kernel deterministically triggers a hard lockup / hang under QEMU since v5.17-rc1 (upgrading from v5.16). + +Bisecting points to the kernel's [0faf20a1ad16](https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=0faf20a1ad1647c0fc0f5a367c71e5e84deaf899) ("powerpc/64s/interrupt: Don't enable MSR[EE] in irq handlers unless perf is in use"). Reverting it on top of v5.17-rc1 fixes the issue. + +Reported to [linuxppc-dev](https://lore.kernel.org/linuxppc-dev/CANiq72n_FmDx=r-o9J8gYc6LpwRL5EGmhM6Xzwv27Xc7h1TNDw@mail.gmail.com/). Confirmed. Suspected QEMU modeling issue by Cédric Le Goater. +Steps to reproduce: +1. Build kernel v5.17-rc1 or commit 0faf20a1ad16 for ppc64le with the attached config (either GCC or Clang). +2. Run it under QEMU with at least `-smp 2`. +Additional information: +[qemu-and-dmesg.log](/uploads/7cb5ce1cb70e06262800c16f4c800157/qemu-and-dmesg.log) +[kernel.config](/uploads/327e9cec48a731abc9e44cb40db67de9/kernel.config) |