linux-kernel - Re: [PATCH] f2fs: add missing doc for fault injection sysfs

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Date:   Thu, 15 Dec 2022 22:14:12 +0800
From:   Yangtao Li <frank.li@...o.com>
To:     jaegeuk@...nel.org, chao@...nel.org
Cc:     linux-f2fs-devel@...ts.sourceforge.net,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] f2fs: add missing doc for fault injection sysfs

Hi Chao,

> -What:		/sys/fs/f2fs/<disk>/gc_mode
> -Date:		October 2022
> -Contact:	"Yangtao Li" <frank.li@...o.com>
> -Description:	Show the current gc_mode as a string.
> -		This is a read-only entry.
 
> -What:		/sys/fs/f2fs/<disk>/discard_urgent_util
> -Date:		November 2022
> -Contact:	"Yangtao Li" <frank.li@...o.com>
> -Description:	When space utilization exceeds this, do background DISCARD aggressively.
> -		Does DISCARD forcibly in a period of given min_discard_issue_time when the number
> -		of discards is not 0 and set discard granularity to 1.
> -		Default: 80
> -
> -What:		/sys/fs/f2fs/<disk>/hot_data_age_threshold
> -Date:		November 2022
> -Contact:	"Ping Xiong" <xiongping1@...omi.com>
> -Description:	When DATA SEPARATION is on, it controls the age threshold to indicate
> -		the data blocks as hot. By default it was initialized as 262144 blocks
> -		(equals to 1GB).
> -
> -What:		/sys/fs/f2fs/<disk>/warm_data_age_threshold
> -Date:		November 2022
> -Contact:	"Ping Xiong" <xiongping1@...omi.com>
> -Description:	When DATA SEPARATION is on, it controls the age threshold to indicate
> -		the data blocks as warm. By default it was initialized as 2621440 blocks
> -		(equals to 10GB).

Why delete other node descriptions, mistake?

Thx,
Yangtao