linux-kernel - Re: [f2fs-dev] [PATCH] f2fs: add compr_inode and compr

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Date:   Tue, 20 Oct 2020 21:36:20 -0700
From:   Eric Biggers <ebiggers@...nel.org>
To:     Daeho Jeong <daeho43@...il.com>
Cc:     linux-kernel@...r.kernel.org,
        linux-f2fs-devel@...ts.sourceforge.net, kernel-team@...roid.com,
        Daeho Jeong <daehojeong@...gle.com>
Subject: Re: [f2fs-dev] [PATCH] f2fs: add compr_inode and compr_blocks sysfs
 nodes

On Fri, Oct 16, 2020 at 02:14:55PM +0900, Daeho Jeong wrote:
> From: Daeho Jeong <daehojeong@...gle.com>
> 
> Added compr_inode to show compressed inode count and compr_blocks to
> show compressed block count in sysfs.
> 
> Signed-off-by: Daeho Jeong <daehojeong@...gle.com>
> ---
>  Documentation/ABI/testing/sysfs-fs-f2fs | 10 ++++++++++
>  fs/f2fs/sysfs.c                         | 17 +++++++++++++++++
>  2 files changed, 27 insertions(+)
> 
> diff --git a/Documentation/ABI/testing/sysfs-fs-f2fs b/Documentation/ABI/testing/sysfs-fs-f2fs
> index 834d0becae6d..a01c26484c69 100644
> --- a/Documentation/ABI/testing/sysfs-fs-f2fs
> +++ b/Documentation/ABI/testing/sysfs-fs-f2fs
> @@ -350,3 +350,13 @@ Date:		April 2020
>  Contact:	"Daeho Jeong" <daehojeong@...gle.com>
>  Description:	Give a way to change iostat_period time. 3secs by default.
>  		The new iostat trace gives stats gap given the period.
> +
> +What:		/sys/fs/f2fs/<disk>/compr_inode
> +Date:		October 2020
> +Contact:	"Daeho Jeong" <daehojeong@...gle.com>
> +Description:	Show compressed inode count
> +
> +What:		/sys/fs/f2fs/<disk>/compr_blocks
> +Date:		October 2020
> +Contact:	"Daeho Jeong" <daehojeong@...gle.com>
> +Description:	Show compressed block count

Is it the count in memory, or on disk?

- Eric