Messages in this thread | | | Date | Thu, 28 Nov 2019 10:44:19 +0100 | From | Borislav Petkov <> | Subject | Re: unchecked MSR access error in throttle_active_work() |
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On Thu, Nov 28, 2019 at 09:54:47AM +0100, Dominik Brodowski wrote: > On most recent mainline kernels (such as 5.5-rc0 up to a6ed68d6468b), I see > the following output in dmesg during startup: > > [ 78.016676] unchecked MSR access error: WRMSR to 0x19c (tried to write 0x00000000880f3a80) at rIP: 0xffffffff84ab5742 (throttle_active_work+0xf2/0x230) > [ 78.016686] Call Trace: > [ 78.016694] process_one_work+0x247/0x590 > [ 78.016703] worker_thread+0x50/0x3b0 > [ 78.016710] kthread+0x10a/0x140 > [ 78.016715] ? process_one_work+0x590/0x590 > [ 78.016735] ? kthread_park+0x90/0x90 > [ 78.016740] ret_from_fork+0x3a/0x50 > > Any clues?
Most likely
f6656208f04e ("x86/mce/therm_throt: Optimize notifications of thermal throttle")
I guess we're missing some X86_FEATURE_ check for that MSR to exist.
Adding more people to Cc.
-- Regards/Gruss, Boris.
https://people.kernel.org/tglx/notes-about-netiquette
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