linux-kernel - Re: power9 NUMA crash while reading debugfs imc

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Message-Id: <9c87dc72-54f8-8510-c400-1e89779cc88b@linux.vnet.ibm.com>
Date:   Fri, 28 Jun 2019 17:19:47 +0530
From:   Anju T Sudhakar <anju@...ux.vnet.ibm.com>
To:     Qian Cai <cai@....pw>
Cc:     Michael Ellerman <mpe@...erman.id.au>,
        "Aneesh Kumar K.V" <aneesh.kumar@...ux.ibm.com>,
        linuxppc-dev@...ts.ozlabs.org, linux-kernel@...r.kernel.org
Subject: Re: power9 NUMA crash while reading debugfs imc_cmd


On 6/28/19 9:04 AM, Qian Cai wrote:
>
>> On Jun 27, 2019, at 11:12 PM, Michael Ellerman <mpe@...erman.id.au> wrote:
>>
>> Qian Cai <cai@....pw> writes:
>>> Read of debugfs imc_cmd file for a memory-less node will trigger a crash below
>>> on this power9 machine which has the following NUMA layout.
>> What type of machine is it?
> description: PowerNV
> product: 8335-GTH (ibm,witherspoon)
> vendor: IBM
> width: 64 bits
> capabilities: smp powernv opal


Hi Qian Cai,

Could you please try with this patch: 
https://lists.ozlabs.org/pipermail/linuxppc-dev/2019-June/192803.html

and see if the issue is resolved?


Thanks,

Anju