linux-kernel - Re: [PATCH v3] mm/vmstat: add events for ksm cow

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Date:   Thu, 24 Mar 2022 13:49:25 +0100
From:   David Hildenbrand <david@...hat.com>
To:     Matthew Wilcox <willy@...radead.org>, cgel.zte@...il.com
Cc:     akpm@...ux-foundation.org, yang.yang29@....com.cn,
        ran.xiaokai@....com.cn, yang.shi@...ux.alibaba.com,
        dave.hansen@...ux.intel.com, minchan@...nel.org, saravanand@...com,
        linux-kernel@...r.kernel.org, linux-mm@...ck.org,
        xu xin <xu.xin16@....com.cn>
Subject: Re: [PATCH v3] mm/vmstat: add events for ksm cow

On 24.03.22 13:45, Matthew Wilcox wrote:
> On Thu, Mar 24, 2022 at 10:43:33AM +0000, cgel.zte@...il.com wrote:
>> +++ b/include/linux/vm_event_item.h
>> @@ -131,6 +131,7 @@ enum vm_event_item { PGPGIN, PGPGOUT, PSWPIN, PSWPOUT,
>>  		SWAP_RA_HIT,
>>  #ifdef CONFIG_KSM
>>  		KSM_SWPIN_COPY,
>> +		COW_KSM,
> 
> Shouldn't we call this KSM_COW?

I guess I proposed COW_KSM because ideally we'll have COW_ANON,
COW_ZERO, COW_OTHER, ... so it'd be under the "COW" namespace. No strong
opinion, though.


-- 
Thanks,

David / dhildenb