Bug 90381
| Summary: | error when loading kvm_intel module kvm_intel unuseable | ||
|---|---|---|---|
| Product: | Virtualization | Reporter: | Bhasker C V (bhasker) |
| Component: | kvm | Assignee: | virtualization_kvm |
| Status: | NEW --- | ||
| Severity: | normal | CC: | bhasker, kashyap.cv |
| Priority: | P1 | ||
| Hardware: | Intel | ||
| OS: | Linux | ||
| Kernel Version: | 3.18.1 | Subsystem: | |
| Regression: | No | Bisected commit-id: | |
| Bug Depends on: | |||
| Bug Blocks: | 94971 | ||
| Attachments: | kernel crash message | ||
The machine (also can be found in the crash attachment) is Dell D620 with processor features as below: processor : 1 vendor_id : GenuineIntel cpu family : 6 model : 15 model name : Intel(R) Core(TM)2 CPU T5500 @ 1.66GHz stepping : 2 microcode : 0x5c cpu MHz : 1000.000 cache size : 2048 KB physical id : 0 siblings : 2 core id : 1 cpu cores : 2 apicid : 1 initial apicid : 1 fpu : yes fpu_exception : yes cpuid level : 10 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 lm constant_tsc arch_perfmon pebs bts rep_good nopl aperfmperf pni dtes64 monitor ds_cpl vmx est tm2 ssse3 cx16 xtpr pdcm lahf_lm dtherm tpr_shadow bugs : bogomips : 3328.70 clflush size : 64 cache_alignment : 64 address sizes : 36 bits physical, 48 bits virtual power management: The 3.14.x stock kernel (of debian) works fine but 3.17.x also does the same crash. I do nott have any other kernel revisions inbetween to iterate. Managed to load the kvm_intel without a crash. This crash seems to happen _only_ if nested=1 is given in the options. Can't reproduce this with Kernel 3.18.1 (current upstream stable) -- tested nested virtualization with KVM. If you face issues with Debian specific Kernels, you might want to report it with Debian Kernel bug tracker. Since this is upstream tracker, you might have to reproduce this with 3.18 (or with 3.19-rc1 mainline). I am using 3.18.1 on my other DELL Q15R and this crash is not happening. This crash is particularly happening on the DELL D620 core2duo machines only. kvm (as per my comment above) does work fine but crashes _only_ when loaded as modprobe kvm_intel nested=1 |
Created attachment 161951 [details] kernel crash message Hi, Whenever I load the kvm_intel module (on my machine which does support vmx), the kernel crashes (not a catastropic crash but the module is no longer useable). kvm_intel is unuseable.