linux-kernel - Re: [RFC][PATCH 04/13] mm/numa: node demotion data structure and lookup

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Message-ID: <5ff0b3ed-b02c-e198-3b27-931bdcde502d@intel.com>
Date:   Mon, 1 Feb 2021 09:49:44 -0800
From:   Dave Hansen <dave.hansen@...el.com>
To:     David Rientjes <rientjes@...gle.com>,
        Dave Hansen <dave.hansen@...ux.intel.com>
Cc:     linux-kernel@...r.kernel.org, linux-mm@...ck.org,
        yang.shi@...ux.alibaba.com, ying.huang@...el.com,
        dan.j.williams@...el.com, david@...hat.com, osalvador@...e.de
Subject: Re: [RFC][PATCH 04/13] mm/numa: node demotion data structure and
 lookup

On 1/30/21 5:19 PM, David Rientjes wrote:
> On Mon, 25 Jan 2021, Dave Hansen wrote:
> 
>> diff -puN mm/migrate.c~0006-node-Define-and-export-memory-migration-path mm/migrate.c
>> --- a/mm/migrate.c~0006-node-Define-and-export-memory-migration-path	2021-01-25 16:23:09.553866709 -0800
>> +++ b/mm/migrate.c	2021-01-25 16:23:09.558866709 -0800
>> @@ -1161,6 +1161,22 @@ out:
>>  	return rc;
>>  }
>>  
>> +static int node_demotion[MAX_NUMNODES] = {[0 ...  MAX_NUMNODES - 1] = NUMA_NO_NODE};
> 
> __read_mostly?

Yep, that's sane.  I'll fix that up in the next revision.