mirror of https://lore.kernel.org/lkml/
 help / color / mirror / Atom feed
From: Daejun Park <daejun7.park@samsung.com>
To: Yongpeng Yang <yangyongpeng1@oppo.com>,
	"jaegeuk@kernel.org" <jaegeuk@kernel.org>,
	"chao@kernel.org" <chao@kernel.org>,
	"corbet@lwn.net" <corbet@lwn.net>,
	"linux-f2fs-devel@lists.sourceforge.net"
	<linux-f2fs-devel@lists.sourceforge.net>,
	"linux-doc@vger.kernel.org" <linux-doc@vger.kernel.org>,
	"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>
Cc: Nayeon Kim <nayeoni.kim@samsung.com>,
	Siwoo Jung <siu.jung@samsung.com>,
	Seokhwan Kim <sukka.kim@samsung.com>,
	Dongjin Kim <dongjin_.kim@samsung.com>,
	Daejun Park <daejun7.park@samsung.com>
Subject: RE:(2) [f2fs-dev] [RFC PATCH] f2fs: add support single node section mode
Date: Mon, 10 Jun 2024 12:15:47 +0900	[thread overview]
Message-ID: <20240610031547epcms2p526560bc9d2fd3a5f36615fe645640079@epcms2p5> (raw)
In-Reply-To: <0db07a4a-91da-402e-9601-46b196b8cf1b@oppo.com>

> Hi Daejun,
> 1. It is not compatible with "F2FS_OPTION(sbi).active_logs == 2".
> 2. Once has_enough_free_secs is false, F2FS cannot restore to multi-node
> sections even after has_enough_free_secs becomes true and the filesystem
> is unmounted and remounted. This seems unreasonable.

Hi Yongpeng Yang,

1. Yes, I will modify it so that it only applies when active_log is 6.
2. This technique is effective when utilization is high. Therefore, in my scenario, I assumed that only heavy users would use this option. So I assumed that the free section would not be sufficiently secured even after that.
Futhermore, if a new section is allocated to deactivate a single node whenever there is free space, then soon again insufficient free space may occur, resulting in more unnecessary GC.

Thanks,
Daejun

      parent reply	other threads:[~2024-06-10  3:16 UTC|newest]

Thread overview: 3+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
     [not found] <CGME20240531074640epcms2p46c3cf8b7cc4e707948ae200115e28e39@epcms2p4>
2024-05-31  7:46 ` Daejun Park
2024-06-03  6:37   ` [f2fs-dev] " Yongpeng Yang
     [not found]   ` <CGME20240531074640epcms2p46c3cf8b7cc4e707948ae200115e28e39@epcms2p5>
2024-06-10  3:15     ` Daejun Park [this message]

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=20240610031547epcms2p526560bc9d2fd3a5f36615fe645640079@epcms2p5 \
    --to=daejun7.park@samsung.com \
    --cc=chao@kernel.org \
    --cc=corbet@lwn.net \
    --cc=dongjin_.kim@samsung.com \
    --cc=jaegeuk@kernel.org \
    --cc=linux-doc@vger.kernel.org \
    --cc=linux-f2fs-devel@lists.sourceforge.net \
    --cc=linux-kernel@vger.kernel.org \
    --cc=nayeoni.kim@samsung.com \
    --cc=siu.jung@samsung.com \
    --cc=sukka.kim@samsung.com \
    --cc=yangyongpeng1@oppo.com \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body. 
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox
all inboxes | Powered by JetHome®