Messages in this thread | | | Date | Fri, 26 Jul 2013 08:00:21 -0700 | From | Srinivas Pandruvada <> | Subject | Re: 3.11-rc2: panic in __rdmsr_on_cpu |
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This is already fixed and it is in Linus main line. Check commit id "f3ed0a17f0292300b3caca32d823ecd32554a667"
Thanks for analysis and you are correct.
Thanks, Srinivas
On 07/26/2013 06:15 AM, Ilia Mirkin wrote: > On Fri, Jul 26, 2013 at 7:59 AM, Ilia Mirkin <imirkin@alum.mit.edu> wrote: >> On Thu, Jul 25, 2013 at 6:32 PM, Ilia Mirkin <imirkin@alum.mit.edu> wrote: >>> Hi, >>> >>> I just built a 3.11-rc2 kernel (+ a few patches, but nothing >>> arch-related), and I saw the following: http://i.imgur.com/dCTqOyR.jpg >>> >>> The rough transcription is >>> >>> Call Trace: >>> <IRQ> >>> generic_smp_call_fucntion_single_interrupt >>> smp_call_function_single_interrupt >>> call_function_single_interrupt >>> <EOI> >>> ? default_idle >>> ? default_idle >>> arch_cpu_idle >>> cpu_startup_entry >>> rest_init >>> start_kernel >>> ? repair_env_string >>> x86_64_start_reservations >>> x86_64_start_kernel >>> Code: ... cc 81 8b 0f <0f> 32 48 c1 e2 20 89 c0 ... >>> RIP: __rdmsr_on_cpu+0x2e/0x44 >>> Kernel panic - not syncing: Fatal exception in interrupt >>> >>> A 3.10-rc7 kernel booted just fine. Is this likely a real issue? Or >>> perhaps a mis-build of some sort? >> FWIW this is repeatable. I did a clean build (make clean && make) and >> I still see the same thing. I have a Core i7-920 cpu, not sure what >> other information would be relevant. I'd love to avoid a bisect, so >> some likely candidates would be most welcome. > Aha, figured it out. I had enabled "X86 package temperature thermal > driver" = Y, which caused my Core i7-920 to produce the above trace on > boot. Glancing over the code, should this: > > if (!cpu_has(c, X86_FEATURE_DTHERM) && > !cpu_has(c, X86_FEATURE_PTS)) > return -ENODEV; > > perhaps be > > if (!cpu_has(c, X86_FEATURE_DTHERM) || > !cpu_has(c, X86_FEATURE_PTS)) > return -ENODEV; > > i.e. are both of those things required, or just one of them? My cpu > has DTHERM but not PTS, according to /proc/cpuinfo. > > -ilia >
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