add 18th iteration of classifier

1 files changed, 69 insertions, 0 deletions

diff --git a/results/classifier/118/kernel/1696 b/results/classifier/118/kernel/1696
new file mode 100644
index 00000000..6a59af88
--- /dev/null
+++ b/results/classifier/118/kernel/1696
@@ -0,0 +1,69 @@
+kernel: 0.865
+x86: 0.814
+architecture: 0.736
+boot: 0.708
+performance: 0.676
+device: 0.664
+files: 0.593
+debug: 0.492
+graphic: 0.480
+semantic: 0.428
+user-level: 0.421
+ppc: 0.407
+peripherals: 0.376
+risc-v: 0.347
+PID: 0.343
+vnc: 0.318
+network: 0.315
+hypervisor: 0.303
+socket: 0.296
+TCG: 0.295
+i386: 0.263
+VMM: 0.260
+register: 0.253
+permissions: 0.216
+virtual: 0.214
+arm: 0.174
+assembly: 0.096
+KVM: 0.073
+mistranslation: 0.050
+
+Linux kernel hangs rarely when booting on the latest qemu
+Description of problem:
+(Downstream bug: https://bugzilla.redhat.com/show_bug.cgi?id=2213346)
+
+In Fedora we have noticed that the latest Linux kernel (rarely) hangs when booting
+on the latest qemu.  It hangs after printing:
+
+```
+[    0.070120] x86/cpu: User Mode Instruction Prevention (UMIP) activated
+[    0.070120] Last level iTLB entries: 4KB 512, 2MB 255, 4MB 127
+[    0.070120] Last level dTLB entries: 4KB 512, 2MB 255, 4MB 127, 1GB 0
+[    0.070120] Spectre V1 : Mitigation: usercopy/swapgs barriers and __user pointer sanitization
+[    0.070120] Spectre V2 : Mitigation: Retpolines
+[    0.070120] Spectre V2 : Spectre v2 / SpectreRSB mitigation: Filling RSB on context switch
+[    0.070120] Spectre V2 : Spectre v2 / SpectreRSB : Filling RSB on VMEXIT
+[    0.070120] Spectre V2 : Enabling Speculation Barrier for firmware calls
+[    0.070120] RETBleed: Mitigation: untrained return thunk
+[    0.070120] Spectre V2 : mitigation: Enabling conditional Indirect Branch Prediction Barrier
+[    0.070120] Speculative Store Bypass: Mitigation: Speculative Store Bypass disabled via prctl
+[    0.070120] Freeing SMP alternatives memory: 48K
+```
+
+The next line which would be printed (if it didn't hang) is:
+
+```
+[    0.070794] smpboot: CPU0: AMD Ryzen 9 3900X 12-Core Processor (family: 0x17, model: 0x71, stepping: 0x0)
+```
+
+We've seen this hang on both AMD and Intel.  It probably happens one in every 300 boots.
+Steps to reproduce:
+By far the easiest way to reproduce this is to just run guestfish in a loop:
+
+```
+$ while guestfish -a /dev/null -v run >& /tmp/log; do echo -n . ; done 
+```
+Additional information:
+The full qemu command is rather long but you can find it in this log file:
+
+https://bugzilla-attachments.redhat.com/attachment.cgi?id=1969620