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Date:   Fri, 3 Dec 2021 13:02:10 -0800
From:   Andrew Morton <akpm@linux-foundation.org>
To:     yongw.pur@gmail.com
Cc:     bsingharora@gmail.com, peterz@infradead.org, mingo@kernel.org,
        linux-kernel@vger.kernel.org, linux-mm@kvack.org,
        yang.yang29@zte.com.cn, wang.yong12@zte.com.cn
Subject: Re: [PATCH linux-next] delayacct: track delays from memory compact
Message-Id: <20211203130210.f34079f175f28bd1c5c26541@linux-foundation.org>
In-Reply-To: <1638542272-15187-1-git-send-email-wang.yong12@zte.com.cn>
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On Fri,  3 Dec 2021 06:37:52 -0800 yongw.pur@gmail.com wrote:

> From: wangyong <wang.yong12@zte.com.cn>
> 
> Delay accounting does not track the delay of memory compact.
> When there is not enough free memory, tasks can spend
> a amount of their time waiting for memory compact.
> 
> To get the impact of tasks in direct memory compact, measure
> the delay when allocating memory through memory compact.
> 
> ...
>
> --- a/include/linux/delayacct.h
> +++ b/include/linux/delayacct.h
> @@ -42,8 +42,13 @@ struct task_delay_info {
>  	u64 thrashing_start;
>  	u64 thrashing_delay;	/* wait for thrashing page */
>  
> +	u64 compact_start;
> +	u64 compact_delay;	/* wait for memory compact */
> +
> +	u64 freepages_start;

task_delay_info already has a freepages_start, so it fails to compile.

Did you send the correct version?