Messages in this thread | | | From | Pu Wen <> | Subject | Re: [LKP] [x86/pci] 7ffb31888c: PANIC:early_exception | Date | Thu, 20 Sep 2018 16:47:19 +0800 |
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On 2018/9/20 8:26, Rong Chen wrote: > On 09/19/2018 09:53 PM, Pu Wen wrote: >> I cannot reproduce this panic on Hygon Dhyana platform. I tired lkp-tests >> both in Ubuntu 16.04 (with gcc-5) and Ubuntu 18.04 (with gcc-7). >> What kind of host do you use to run the qemu? A Intel one or AMD one? > It's a Intel one, > > model: Nehalem-EX > memory: 224G > nr_node: 4 > nr_cpu: 64 > nr_socket: 4 > brand: Intel(R) Xeon(R) CPU X7560 @ 2.27GHz
I reproduced the PANIC by running lkp-tests with a Intel machine.
The reason is that the function early_is_amd_nb is called even if running on Intel machine. At this case the misc_ids is NULL so the PANIC occur.
I'll rework a patch to solve this problem, either restore the default value of misc_ids with the original AMD one or not call early_is_amd_nb on Intel platform.
-- Regards, Pu Wen
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