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From: Chao Yu <chao@kernel.org>
To: 李扬韬 <frank.li@vivo.com>
Cc: jaegeuk@kernel.org, linux-f2fs-devel@lists.sourceforge.net,
	linux-kernel@vger.kernel.org
Subject: Re: [PATCH 1/2] f2fs: add sysfs nodes to get discard information
Date: Mon, 16 Aug 2021 12:15:16 +0800	[thread overview]
Message-ID: <af34f9cd-8972-583b-bae2-f11fe9058e63@kernel.org> (raw)
In-Reply-To: <ACIArwDxD7lffBbq-DPSbarm.3.1629081754403.Hmail.frank.li@vivo.com>

On 2021/8/16 10:42, 李扬韬 wrote:
>>> I've added new sysfs nodes to show discard stat since mount, which
>>> will help us analyze whether the performance problem is related to
>>> discard.
>>>
>>> issued_discard  - Shows the number of issued discard
>>> queued_discard  - Shows the number of cached discard cmd count
>>> discard_cmd_cnt - Shows the number of cached discard cmd count
>>> undiscard_blks  - Shows the number of undiscard blocks
>>
>> We have exported them in debugfs, can you use that?
>>
>> Thanks,
> 
> But now Android is forbidden to open debugfs, and in fact we have not
> opened this configuration for a long time.

Weren't them be used for debug purpose? can you please explain more about
your use case?

Thanks,

> 
> Thx,
> Yangtao
> 
> 
> 

  reply	other threads:[~2021-08-16  4:15 UTC|newest]

Thread overview: 9+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-08-14 17:58 Yangtao Li
2021-08-14 17:58 ` [PATCH 2/2] f2fs: fix description about main_blkaddr node Yangtao Li
2021-08-16  2:37   ` Chao Yu
2021-08-16  2:35 ` [PATCH 1/2] f2fs: add sysfs nodes to get discard information Chao Yu
2021-08-16  2:42   ` 李扬韬
2021-08-16  4:15     ` Chao Yu [this message]
2021-08-16  6:13       ` 李扬韬
2021-08-17  0:16         ` Jaegeuk Kim
2021-08-19  4:49         ` Chao Yu

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