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

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Message-ID: <Yjxn53YcdKDcV7zX@casper.infradead.org>
Date:   Thu, 24 Mar 2022 12:45:27 +0000
From:   Matthew Wilcox <willy@...radead.org>
To:     cgel.zte@...il.com
Cc:     akpm@...ux-foundation.org, david@...hat.com,
        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 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?

> +++ b/mm/vmstat.c
> @@ -1390,6 +1390,7 @@ const char * const vmstat_text[] = {
>  	"swap_ra_hit",
>  #ifdef CONFIG_KSM
>  	"ksm_swpin_copy",
> +	"cow_ksm",

... and this "ksm_cow"?