From: Marc MERLIN <marc@merlins.org>
To: dsterba@suse.cz, Martin Steigerwald <martin@lichtvoll.de>,
Josef Bacik <josef@toxicpanda.com>,
linux-btrfs@vger.kernel.org, kernel-team@fb.com,
Roman Mamedov <rm@romanrm.net>
Subject: Re: [PATCH] btrfs: do not zero f_bavail if we have available space
Date: Thu, 20 Feb 2020 13:46:49 -0800 [thread overview]
Message-ID: <20200220214649.GD26873@merlins.org> (raw)
In-Reply-To: <2656316.bop9uDDU3N@merkaba> <20200219225051.39ca1082@natsu> <20200219153652.GA26873@merlins.org>
Well, turns out this was a more serious bug than we thought.
With dm-thin overcommit, it causes this:
[1324107.675334] BTRFS info (device dm-13): forced readonly
[1324107.692909] BTRFS warning (device dm-13): Skipping commit of aborted transaction.
[1324107.717141] BTRFS: error (device dm-13) in cleanup_transaction:1828: errno=-5 IO failure
[1324107.743298] BTRFS info (device dm-13): delayed_refs has NO entry
[1324107.817671] device-mapper: thin: 252:9: switching pool to write mode
[1324108.662095] BTRFS error (device dm-13): bad tree block start, want 9050645626880 have 0
[1324108.694286] BTRFS error (device dm-13): bad tree block start, want 9050645626880 have 0
In other words, this broke my filesystem. I didn't try to see if it's damaged or just read-only,
but obviously, this isn't good.
New kernel should stop this from happening hopefully.
VG/dm details if you care:
VG Name vgds2
System ID
Format lvm2
Metadata Areas 1
Metadata Sequence No 88
VG Access read/write
VG Status resizable
MAX LV 0
Cur LV 8
Open LV 7
Max PV 0
Cur PV 1
Act PV 1
VG Size 14.55 TiB
PE Size 4.00 MiB
Total PE 3815316
Alloc PE / Size 3801146 / 14.50 TiB
Free PE / Size 14170 / 55.35 GiB
VG UUID pc1cTH-kFo7-g0Kz-dELp-j51s-1yOO-v20WIV
--- Logical volume ---
LV Name thinpool2
VG Name vgds2
LV UUID rxJCsT-ImNv-ibvM-zOS0-Xzqv-O8AU-1STUH9
LV Write Access read/write
LV Creation host, time gargamel.svh.merlins.org, 2018-07-26 08:42:51 -0700
LV Pool metadata thinpool2_tmeta
LV Pool data thinpool2_tdata
LV Status available
# open 8
LV Size 14.50 TiB
Allocated pool data 99.99%
Allocated metadata 59.88%
Current LE 3801088
Segments 1
Allocation inherit
Read ahead sectors auto
- currently set to 8192
Block device 252:9
LV Path /dev/vgds2/ubuntu
LV Name ubuntu
VG Name vgds2
LV UUID y42AA8-5zfq-Vbmr-TNo9-g7rn-UbGf-KOnFrf
LV Write Access read/write
LV Creation host, time gargamel.svh.merlins.org, 2018-07-26 23:22:18 -0700
LV Pool name thinpool2
LV Status available
# open 1
LV Size 14.00 TiB
Mapped size 60.26%
Current LE 3670016
Segments 1
Allocation inherit
Read ahead sectors auto
- currently set to 8192
Block device 252:13
--
"A mouse is a device used to point at the xterm you want to type in" - A.S.R.
Home page: http://marc.merlins.org/ | PGP 7F55D5F27AAF9D08
next prev parent reply other threads:[~2020-02-20 21:46 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 [this message]
2020-02-21 5:38 ` Marc MERLIN
2020-02-21 5:45 ` Roman Mamedov
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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