Dear Sir,
It is not a urgent question. I am not loosing files.
I am using Qubes. It has all linux virtualized and based on templates.
In my template, I changed my private.img file and it has inside /rw,
/home and /usr/local from ext4 to btrfs, using btrfs-convert.
It starts ok, rw and after a while it changes to ro.
Thank You.
uname -a
Linux app-personal 4.19.36-1.pvops.qubes.x86_64 #1 SMP Sun Apr 21
23:53:50 UTC 2019 x86_64 x86_64 x86_64 GNU/Linux
btrfs --version
btrfs-progs v4.20.2
sudo btrfs fi show
Label: none uuid: a6f85221-6c15-4181-84f5-2012ebffb38d
Total devices 1 FS bytes used 212.35GiB
devid 1 size 250.00GiB used 249.81GiB path /dev/xvdb
/etc/fstab:
/dev/xvdb /rw auto
noauto,defaults,discard 1 2
/rw/home /home none noauto,bind,defaults 0 0
/rw/usrlocal /usr/local none noauto,bind,defaults 0 0
sudo btrfs fi df /rw
Data, single: total=249.00GiB, used=211.86GiB
System, single: total=4.00MiB, used=64.00KiB
Metadata, single: total=827.12MiB, used=505.20MiB
GlobalReserve, single: total=269.50MiB, used=0.00B
sudo btrfs fi df /home
Data, single: total=249.00GiB, used=211.86GiB
System, single: total=4.00MiB, used=64.00KiB
Metadata, single: total=827.12MiB, used=505.20MiB
GlobalReserve, single: total=269.50MiB, used=0.00B
sudo btrfs fi df /usr/local
Data, single: total=249.00GiB, used=211.86GiB
System, single: total=4.00MiB, used=64.00KiB
Metadata, single: total=827.12MiB, used=505.20MiB
GlobalReserve, single: total=269.50MiB, used=0.00B
MOUNT:
/dev/xvdb on /rw type btrfs
(ro,relatime,ssd,discard,space_cache,subvolid=5,subvol=/)
/dev/xvdb on /home type btrfs
(ro,relatime,ssd,discard,space_cache,subvolid=5,subvol=/home)
/dev/xvdb on /usr/local type btrfs
(ro,relatime,ssd,discard,space_cache,subvolid=5,subvol=/usrlocal)
/dev/xvdb on /var/spool/cron type btrfs
(ro,relatime,ssd,discard,space_cache,subvolid=5,subvol=/bind-dirs/var/spool/cron)
DMESG:
[ 302.185704] ------------[ cut here ]------------
[ 302.185726] BTRFS: Transaction aborted (error -95)
[ 302.185830] WARNING: CPU: 1 PID: 1450 at
/home/user/rpmbuild/BUILD/kernel-4.19.36/linux-4.19.36/fs/btrfs/inode.c:3063
btrfs_finish_ordered_io+0x6f1/0x7d0 [btrfs]
[ 302.185871] Modules linked in: fuse ip6table_filter ip6_tables
xt_conntrack ipt_MASQUERADE iptable_nat nf_nat_ipv4 nf_nat nf_conntrack
nf_defrag_ipv6 nf_defrag_ipv4 xen_netfront edac_mce_amd crct10dif_pclmul
crc32_pclmul ghash_clmulni_intel pcspkr btrfs xor zstd_compress raid6_pq
libcrc32c crc32c_intel zstd_decompress xxhash binfmt_misc u2mfn(O)
xen_gntdev xen_gntalloc xen_blkback xen_evtchn xenfs xen_privcmd
xen_blkfront
[ 302.185985] CPU: 1 PID: 1450 Comm: kworker/u8:9 Tainted: G
O 4.19.36-1.pvops.qubes.x86_64 #1
[ 302.186027] Workqueue: btrfs-endio-write btrfs_endio_write_helper
[btrfs]
[ 302.186062] RIP: 0010:btrfs_finish_ordered_io+0x6f1/0x7d0 [btrfs]
[ 302.186080] Code: fc ff ff 49 8b 45 50 f0 48 0f ba a8 88 0c 00 00 02
72 19 8b 44 24 08 83 f8 fb 74 37 89 c6 48 c7 c7 c8 de 1f c0 e8 5f 7e f4
c0 <0f> 0b 8b 4c 24 08 ba f7 0b 00 00 48 c7 c6 d0 f2 1e c0 4c 89 ef e8
[ 302.186123] RSP: 0018:ffffc90002b37dc0 EFLAGS: 00010282
[ 302.186138] RAX: 0000000000000000 RBX: ffff8882e4b549a0 RCX:
0000000000000000
[ 302.186156] RDX: ffff8883d909cf40 RSI: ffff8883d90968b8 RDI:
ffff8883d90968b8
[ 302.186176] RBP: ffff8882e4b54780 R08: 0000000000000001 R09:
0000000000000198
[ 302.186195] R10: 00000000ffffffff R11: 0000000000000000 R12:
0000000000001000
[ 302.186214] R13: ffff8883a1fac1a0 R14: ffff88831fe41800 R15:
ffff8882d16efd40
[ 302.186237] FS: 0000000000000000(0000) GS:ffff8883d9080000(0000)
knlGS:0000000000000000
[ 302.186260] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 302.186276] CR2: 00003f85975751c0 CR3: 0000000233502000 CR4:
00000000000406e0
[ 302.186297] Call Trace:
[ 302.186325] normal_work_helper+0xd0/0x320 [btrfs]
[ 302.186344] ? __schedule+0x3fd/0x870
[ 302.186357] process_one_work+0x191/0x370
[ 302.186370] worker_thread+0x4f/0x3b0
[ 302.186382] kthread+0xf8/0x130
[ 302.186393] ? rescuer_thread+0x340/0x340
[ 302.186405] ? kthread_create_worker_on_cpu+0x70/0x70
[ 302.186422] ret_from_fork+0x22/0x40
[ 302.186436] ---[ end trace a159086bba5ec4c0 ]---
[ 302.186451] BTRFS: error (device xvdb) in
btrfs_finish_ordered_io:3063: errno=-95 unknown
[ 302.186472] BTRFS info (device xvdb): forced readonly
[18866.153953] BTRFS info (device xvdb): disk space caching is enabled
[18866.153979] BTRFS error (device xvdb): Remounting read-write after
error is not allowed
