From: Roman Mamedov <rm@romanrm.net>
To: Chris Murphy <lists@colorremedies.com>
Cc: Btrfs BTRFS <linux-btrfs@vger.kernel.org>
Subject: Re: 5.6-rc1, fstrim reports different value 1 minute later
Date: Thu, 13 Feb 2020 11:21:10 +0500 [thread overview]
Message-ID: <20200213112110.7100baf2@natsu> (raw)
In-Reply-To: <CAJCQCtS9Te9gRAGwin_Wjqv_3cJXVXthNa1g53zF4PbZW+k0Qg@mail.gmail.com>
On Wed, 12 Feb 2020 23:08:03 -0700
Chris Murphy <lists@colorremedies.com> wrote:
> Host: kernel 5.5.3, qemu-kvm, Btrfs, backing file is raw with +C 5.6.
> Guest: kernel 5.6.0-rc1, / is Btrfs
>
> Boot and login, and immediately run these commands:
>
> [root@localhost ~]# df -h
> /dev/vda4 96G 4.4G 91G 5% /
> # fstrim -v /
> /: 91 GiB (97633062912 bytes) trimmed
>
> 1 minute later
>
> [root@localhost ~]# fstrim -v /
> /: 3.5 GiB (3747549184 bytes) trimmed
> [root@localhost ~]#
>
> There's no activity happening in this one minute period. Reboot, and
> it's reproducible again. 91G trimmed the first time then 3.5G the
> second. Seems like new and unusual behavior. No kernel messages at all
> in either host or guest.
For completeness, what would be returned the 3rd time you trim?
--
With respect,
Roman
next prev parent reply other threads:[~2020-02-13 6:21 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-02-13 6:08 5.6-rc1, fstrim reports different value 1 minute later Chris Murphy
2020-02-13 6:21 ` Roman Mamedov [this message]
2020-02-13 6:28 ` 5.5-5.6-rc1, " Chris Murphy
2020-02-13 6:37 ` Chris Murphy
2020-02-13 6:51 ` Roman Mamedov
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=20200213112110.7100baf2@natsu \
--to=rm@romanrm.net \
--cc=linux-btrfs@vger.kernel.org \
--cc=lists@colorremedies.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;
as well as URLs for NNTP newsgroup(s).