1 files changed, 43 insertions, 0 deletions
diff --git a/results/classifier/118/ppc/842 b/results/classifier/118/ppc/842
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+ppc: 0.903
+peripherals: 0.849
+kernel: 0.766
+graphic: 0.761
+device: 0.736
+debug: 0.667
+semantic: 0.654
+architecture: 0.569
+performance: 0.503
+files: 0.502
+vnc: 0.490
+risc-v: 0.443
+register: 0.432
+boot: 0.395
+permissions: 0.369
+PID: 0.329
+TCG: 0.317
+socket: 0.284
+network: 0.276
+user-level: 0.206
+VMM: 0.192
+x86: 0.172
+virtual: 0.163
+i386: 0.146
+arm: 0.132
+assembly: 0.130
+mistranslation: 0.124
+hypervisor: 0.121
+KVM: 0.036
+
+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)