linux-kernel - Re: [REPORT] Softlockups on PowerNV with upstream

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Message-ID: <owom635ndcq4q7focxbhmyvzckbtxme6n2p7g2v25b3jevuoeb@3nzz4nec7u7n>
Date: Thu, 10 Apr 2025 17:08:22 +0530
From: Aditya Gupta <adityag@...ux.ibm.com>
To: Gavin Shan <gshan@...hat.com>
Cc: linux-mm@...ck.org, Andrew Morton <akpm@...ux-foundation.org>,
        Danilo Krummrich <dakr@...nel.org>,
        David Hildenbrand <david@...hat.com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Mahesh J Salgaonkar <mahesh@...ux.ibm.com>,
        Oscar Salvador <osalvador@...e.de>,
        "Rafael J. Wysocki" <rafael@...nel.org>,
        Sourabh Jain <sourabhjain@...ux.ibm.com>, linux-kernel@...r.kernel.org,
        Gavin Shan <shan.gavin@...il.com>
Subject: Re: [REPORT] Softlockups on PowerNV with upstream

Hi Gavin,

Sorry for the late reply.

On 25/04/10 11:35AM, Gavin Shan wrote:
> >      [    2.783371] smp: Brought up 4 nodes, 256 CPUs
> >      [    2.783475] numa: Node 0 CPUs: 0-63
> >      [    2.783537] numa: Node 2 CPUs: 64-127
> >      [    2.783591] numa: Node 4 CPUs: 128-191
> >      [    2.783653] numa: Node 6 CPUs: 192-255
> >      [    2.804945] Memory: 735777792K/738197504K available (17536K kernel code, 5760K rwdata, 15232K rodata, 6528K init, 2517K bss, 1369664K reserved, 0K cma-reserved)
> 
> The NUMA node number leaps by one. It seems the machine has 800GB memory if I'm correct.

Yes Gavin, almost 700G:

    # lsmem
    RANGE                                  SIZE  STATE REMOVABLE         BLOCK
    0x0000000000000000-0x0000001fffffffff  128G online       yes         0-127
    0x0000400000000000-0x0000400fffffffff   64G online       yes   65536-65599
    0x0000800000000000-0x0000803fffffffff  256G online       yes 131072-131327
    0x0000c00000000000-0x0000c03fffffffff  256G online       yes 196608-196863
    
    Memory block size:         1G
    Total online memory:     704G
    Total offline memory:      0B

Thanks,
- Aditya G