From: Phillip Susi <phill@thesusis.net>
To: Dave Chinner <david@fromorbit.com>
Cc: linux-fsdevel@vger.kernel.org, Theodore Ts'o <tytso@mit.edu>
Subject: Re: Uneccesary flushes waking up suspended disks
Date: Mon, 25 Mar 2024 13:09:27 -0400 [thread overview]
Message-ID: <87le66nsqg.fsf@vps.thesusis.net> (raw)
In-Reply-To: <Zftb+PwS3GkKbCAv@dread.disaster.area>
Dave Chinner <david@fromorbit.com> writes:
> Now the filesystem is idle, with no dirty data or metadata.
>
> In the case of XFS, this will begin the process of "covering the
> log". This takes 60-90s (3 consecutive log sync worker executions),
> and it involves the journal updating and logging the superblock and
> writing it back to mark the journal as empty.
Apparently ext4 only bothers journaling metadata updates. If part of a
regular file data is overwritten, it does not trigger a transaction.
Are you saying that XFS does commit a transaction and therefore flush
after just overwriting an existing block in a file, with no metadata
being changed?
prev parent reply other threads:[~2024-03-25 17:09 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-03-07 13:53 Uneccesary flushes waking up suspended disks Phillip Susi
2024-03-07 15:37 ` Theodore Ts'o
2024-03-08 20:54 ` Phillip Susi
2024-03-09 17:37 ` Theodore Ts'o
2024-03-12 20:35 ` Phillip Susi
2024-03-11 1:32 ` Dave Chinner
2024-03-15 14:05 ` Phillip Susi
2024-03-16 4:38 ` Darrick J. Wong
2024-03-16 18:35 ` Phillip Susi
2024-03-17 22:45 ` Dave Chinner
2024-03-20 12:38 ` Phillip Susi
2024-03-20 21:58 ` Dave Chinner
2024-03-25 17:09 ` Phillip Susi [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=87le66nsqg.fsf@vps.thesusis.net \
--to=phill@thesusis.net \
--cc=david@fromorbit.com \
--cc=linux-fsdevel@vger.kernel.org \
--cc=tytso@mit.edu \
/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 an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.