Bug 928251
| Summary: | guest call trace on haswell host when disable 'tsc' cpu flag via '-cpu model_name,-flag' | ||
|---|---|---|---|
| Product: | Red Hat Enterprise Linux 7 | Reporter: | Sibiao Luo <sluo> |
| Component: | qemu-kvm | Assignee: | Hai Huang <hhuang> |
| Status: | CLOSED NOTABUG | QA Contact: | Virtualization Bugs <virt-bugs> |
| Severity: | medium | Docs Contact: | |
| Priority: | medium | ||
| Version: | 7.0 | CC: | acathrow, chayang, ehabkost, hhuang, juzhang, michen, shuang, virt-maint, xfu |
| Target Milestone: | rc | ||
| Target Release: | --- | ||
| Hardware: | Unspecified | ||
| OS: | Unspecified | ||
| Whiteboard: | |||
| Fixed In Version: | Doc Type: | Bug Fix | |
| Doc Text: | Story Points: | --- | |
| Clone Of: | Environment: | ||
| Last Closed: | 2013-03-28 12:36:41 UTC | Type: | Bug |
| Regression: | --- | Mount Type: | --- |
| Documentation: | --- | CRM: | |
| Verified Versions: | Category: | --- | |
| oVirt Team: | --- | RHEL 7.3 requirements from Atomic Host: | |
| Cloudforms Team: | --- | Target Upstream Version: | |
| Embargoed: | |||
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Description
Sibiao Luo
2013-03-27 09:18:14 UTC
# nc -U /tmp/ttyS0 [ 0.011612] divide error: 0000 [#1] SMP [ 0.012000] Modules linked in: [ 0.012000] CPU 0 [ 0.012000] Pid: 1, comm: swapper/0 Tainted: G W -------------- 3.9.0-0.rc4.45.el7.x86_64 #1 Bochs Bochs [ 0.012000] RIP: 0010:[<ffffffff810b7a70>] [<ffffffff810b7a70>] clockevents_config.part.1+0x20/0x90 [ 0.012000] RSP: 0000:ffff880140e97dd8 EFLAGS: 00010246 [ 0.012000] RAX: ffffffffffffffff RBX: ffff880142a0dc00 RCX: 0000000000000000 [ 0.012000] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffffffffffff [ 0.012000] RBP: ffff880140e97de0 R08: 0000000000000001 R09: 00000000000000cb [ 0.012000] R10: 00000000000000ca R11: 0000000000000003 R12: 000000000000b008 [ 0.012000] R13: 000000000000b010 R14: 000000000000000a R15: 0000000000000009 [ 0.012000] FS: 0000000000000000(0000) GS:ffff880142a00000(0000) knlGS:0000000000000000 [ 0.012000] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 0.012000] CR2: 00000000ffffffff CR3: 00000000018ea000 CR4: 00000000001406f0 [ 0.012000] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 0.012000] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400 [ 0.012000] Process swapper/0 (pid: 1, threadinfo ffff880140e96000, task ffff880140f18000) [ 0.012000] Stack: [ 0.012000] ffff880142a0dc00 ffff880140e97df8 ffffffff810b7b00 ffff880142a0dc00 [ 0.012000] ffff880140e97e08 ffffffff815ee7f7 ffff880140e97e48 ffffffff81a232f5 [ 0.012000] 00000000000006b6 0000000000000000 000000000000b008 000000000000b010 [ 0.012000] Call Trace: [ 0.012000] [<ffffffff810b7b00>] clockevents_config_and_register+0x20/0x30 [ 0.012000] [<ffffffff815ee7f7>] setup_APIC_timer+0xe6/0xf2 [ 0.012000] [<ffffffff81a232f5>] setup_boot_APIC_clock+0x4d8/0x4e4 [ 0.012000] [<ffffffff81a2161d>] native_smp_prepare_cpus+0x33d/0x35d [ 0.012000] [<ffffffff81a12fa7>] kernel_init_freeable+0xc4/0x207 [ 0.012000] [<ffffffff815e1ba0>] ? rest_init+0x80/0x80 [ 0.012000] [<ffffffff815e1bae>] kernel_init+0xe/0x180 [ 0.012000] [<ffffffff8160c82c>] ret_from_fork+0x7c/0xb0 [ 0.012000] [<ffffffff815e1ba0>] ? rest_init+0x80/0x80 [ 0.012000] Code: ff eb bb 0f 0b 66 0f 1f 44 00 00 0f 1f 44 00 00 55 31 d2 89 f1 89 f6 41 b8 01 00 00 00 48 89 e5 53 48 89 fb 48 8b 7f 70 48 89 f8 <48> f7 f6 48 85 c0 74 0b 48 3d 58 02 00 00 41 89 c0 77 3d 48 8d [ 0.012000] RIP [<ffffffff810b7a70>] clockevents_config.part.1+0x20/0x90 [ 0.012000] RSP <ffff880140e97dd8> [ 0.012003] ---[ end trace d3dcfda080ddfc5e ]--- [ 0.013012] Kernel panic - not syncing: Attempted to kill init! exitcode=0x0000000b [ 0.013012] processor : 3 vendor_id : GenuineIntel cpu family : 6 model : 60 model name : Intel(R) Core(TM) i5-4670T CPU @ 2.30GHz stepping : 3 microcode : 0x6 cpu MHz : 2301.000 cache size : 6144 KB physical id : 0 siblings : 4 core id : 3 cpu cores : 4 apicid : 6 initial apicid : 6 fpu : yes fpu_exception : yes cpuid level : 13 wp : yes flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe syscall nx pdpe1gb rdtscp lm constant_tsc arch_perfmon pebs bts rep_good nopl xtopology nonstop_tsc aperfmperf eagerfpu pni pclmulqdq dtes64 monitor ds_cpl vmx smx est tm2 ssse3 fma cx16 xtpr pdcm pcid sse4_1 sse4_2 x2apic movbe popcnt tsc_deadline_timer aes xsave avx f16c rdrand lahf_lm abm ida arat epb xsaveopt pln pts dtherm tpr_shadow vnmi flexpriority ept vpid fsgsbase tsc_adjust bmi1 hle avx2 smep bmi2 erms invpcid rtm bogomips : 4589.57 clflush size : 64 cache_alignment : 64 address sizes : 39 bits physical, 48 bits virtual power management: I met anther issue, but not sure whether the same as this one. when i disable the 'nx' flag via '-cpu model_name,-flag' when boot up guest, it will hang at 'Loading initial ramdisk...' and fail to boot up, it cann't continue and have no any call trace. btw, if i disable the 'kvmclock' flag, it can boot up guest sucessfully and verify the 'kvmclock' flag not existing in /sys/devices/system/clocksource/clocksource0/available_clocksource. Does this issue(disable the 'nx' flag cause guest hang and fail to boot) the same as 'tsc' issue ? Should i need to open a new bug to tracing this ? Both issues are completely different. Different flags can trigger different kinds of guest behavior. About the specific "-tsc" issue: guests are very likely to not be able to handle weird configurations, such as a modern CPU without the TSC feature. There are many different ways you can make a guest misbehave by presenting a combination of CPU features that doesn't exist on real hardware. About the "-nx" issue: this is unexpected, as having NX disabled is very common on real hardware. Please open a separate bug for it. |