From: Roman Mamedov <rm@romanrm.net>
To: Marc MERLIN <marc@merlins.org>
Cc: dsterba@suse.cz, Martin Steigerwald <martin@lichtvoll.de>,
Josef Bacik <josef@toxicpanda.com>,
linux-btrfs@vger.kernel.org, kernel-team@fb.com
Subject: Re: [PATCH] btrfs: do not zero f_bavail if we have available space
Date: Fri, 21 Feb 2020 10:45:45 +0500 [thread overview]
Message-ID: <20200221104545.6335cbd1@natsu> (raw)
In-Reply-To: <20200221053804.GA7869@merlins.org>
On Thu, 20 Feb 2020 21:38:04 -0800
Marc MERLIN <marc@merlins.org> wrote:
> I had a closer look, and even with 5.4.20, my whole lv is full now:
> LV Name thinpool2
> Allocated pool data 99.99%
> Allocated metadata 59.88%
Oversubscribing thin storage should be done carefully and only with a very
good reason, and when you run out of something you didn't have in the first
place, seems hard to blame Btrfs or anyone else for it.
> Sure enough, that broken ubuntu one (that really only needs 4GB or so),
> is now taking 60% of the mapped size (i.e. everything that was left)
> LV Name ubuntu
> Mapped size 60.26%
Provide full output of lvdisplay -m, not snippets of it. As is, "omg 60%"
tells nothing to anyone, who knows maybe this LV is maybe 6 GB in size, and at
60% used, it comes out to 4GB exactly.
> I'm now running this overnight, but any command on that filesystem, just
> hangs for now:
> gargamel:/mnt/btrfs_pool2/backup/ubuntu# fstrim -v .
At this point "Data%" in `lvs` output should be decreasing steadily. (if not,
check your dmesg for some kind of a hang or deadlock).
--
With respect,
Roman
next prev parent reply other threads:[~2020-02-21 5:45 UTC|newest]
Thread overview: 26+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-01-31 14:31 [PATCH] btrfs: do not zero f_bavail if we have available space Josef Bacik
2020-01-31 20:06 ` Martin Steigerwald
2020-02-01 1:00 ` Qu Wenruo
2020-02-02 17:52 ` David Sterba
[not found] ` <CAKhhfD7S=kcKLRURdNFZ8H4beS8=XjFvnOQXche7+SVOGFGC_w@mail.gmail.com>
2020-02-19 9:17 ` Martin Steigerwald
2020-02-19 13:43 ` Marc MERLIN
2020-02-19 14:31 ` David Sterba
2020-02-19 15:36 ` Marc MERLIN
2020-02-19 17:50 ` Roman Mamedov
2020-02-19 22:21 ` Martin Steigerwald
2020-02-20 21:46 ` Marc MERLIN
2020-02-21 5:38 ` Marc MERLIN
2020-02-21 5:45 ` Roman Mamedov [this message]
2020-02-21 23:07 ` btrfs filled up dm-thin and df%: shows 8.4TB of data used when I'm only using 10% of that Marc MERLIN
2020-02-21 23:17 ` How to roll back btrfs filesystem a few revisions? Marc MERLIN
2020-02-21 23:47 ` Josef Bacik
2020-02-22 0:08 ` Marc MERLIN
2020-02-22 0:36 ` Josef Bacik
2020-02-21 23:43 ` btrfs filled up dm-thin and df%: shows 8.4TB of data used when I'm only using 10% of that Josef Bacik
2020-02-22 0:01 ` Marc MERLIN
2020-02-22 0:43 ` Josef Bacik
2020-02-22 1:06 ` Marc MERLIN
2020-02-22 1:23 ` Marc MERLIN
2020-02-22 14:51 ` Marc MERLIN
2020-02-22 14:52 ` Josef Bacik
2020-02-22 15:24 ` Marc MERLIN
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