linux-kernel - Re: [PATCH] f2fs: add iostat support for FS_DISCARD

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Date:   Mon, 12 Dec 2022 18:23:03 +0800
From:   Chao Yu <chao@...nel.org>
To:     Yangtao Li <frank.li@...o.com>, jaegeuk@...nel.org
Cc:     linux-f2fs-devel@...ts.sourceforge.net,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] f2fs: add iostat support for FS_DISCARD_IO

On 2022/12/12 13:47, Yangtao Li wrote:
> Just like other data we count uses the number of bytes as the basic
> unit, but discard uses the number of cmds as the statistical unit. In
> fact, the discard command contains the number of blocks. In order to
> avoid breaking its usage of application, let's keeping FS_DISCARD
> as it is, and add FS_DISCARD_IO to account discard bytes.
> 
> Suggested-by: Chao Yu <chao@...nel.org>
> Signed-off-by: Yangtao Li <frank.li@...o.com>

Reviewed-by: Chao Yu <chao@...nel.org>

Thanks,