Hi all,
on one of my machines I'm seeing these warnings a lot lately:
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WARNING: CPU: 1 PID: 314 at fs/fs-writeback.c:2472
__writeback_inodes_sb_nr+0xb8/0xd0
Modules linked in: iTCO_wdt wireguard curve25519_x86_64 libchacha20poly1305
intel_pmc_bxt iTCO_vendor_support chacha_x86_64 poly1305_x86_64 libblake2s
blake2s_x86_64 ip6_udp_tunnel udp_tunnel libcurve25519_generic libchacha
libblake2s_generic psmouse joydev mousedev pcspkr i2c_i801 i2c_smbus lpc_ich
iptable_filter xt_nat xt_tcpudp intel_agp intel_gtt iptable_nat nf_nat
qemu_fw_cfg nf_conntrack nf_defrag_ipv6 nf_defrag_ipv4 mac_hid vfat fat
auth_rpcgss sunrpc fuse ip_tables x_tables btrfs blake2b_generic libcrc32c
crc32c_generic xor raid6_pq dm_crypt cbc encrypted_keys trusted tpm usbhid
dm_mod virtio_gpu virtio_dma_buf drm_kms_helper syscopyarea sysfillrect
sysimgblt fb_sys_fops cec drm virtio_scsi virtio_balloon virtio_net
virtio_console net_failover agpgart failover crct10dif_pclmul crc32_pclmul
crc32c_intel ghash_clmulni_intel aesni_intel crypto_simd cryptd glue_helper
serio_raw sr_mod cdrom xhci_pci virtio_pci virtio_rng rng_core
CPU: 1 PID: 314 Comm: btrfs-transacti Tainted: G W
5.10.26-1-MANJARO #1
Hardware name: Hetzner vServer, BIOS 20171111 11/11/2017
RIP: 0010:__writeback_inodes_sb_nr+0xb8/0xd0
Code: 0f b6 d1 48 8d 74 24 10 e8 35 fc ff ff 48 89 e7 e8 7d fb ff ff 48 8b 44 24 48
65 48 2b 04 25 28 00 00 00 75 09 48 83 c4 50 c3 <0f> 0b eb cf e8 df 8c 75 00 66
66 2e 0f 1f 84 00 00 00 00 00 0f 1f
RSP: 0018:ffffb1f5448f7d98 EFLAGS: 00010246
RAX: 0000000000000000 RBX: ffff961185aa5488 RCX: 0000000000000000
RDX: 0000000000000002 RSI: 0000000000004b45 RDI: ffff9611b7220000
RBP: ffff9611b64d3958 R08: ffff961184efc800 R09: 0000000000000140
R10: ffff9611859e6400 R11: ffff961192af3c10 R12: ffff9611838f7c00
R13: ffff961185aa5000 R14: ffff961185aa5460 R15: 0000000000011a0f
FS: 0000000000000000(0000) GS:ffff9611fad00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f654bc76b58 CR3: 0000000002c60000 CR4: 00000000003506e0
Call Trace:
btrfs_commit_transaction+0x448/0xbc0 [btrfs]
? start_transaction+0xcc/0x5b0 [btrfs]
transaction_kthread+0x143/0x170 [btrfs]
? btrfs_cleanup_transaction.isra.0+0x560/0x560 [btrfs]
kthread+0x133/0x150
? __kthread_bind_mask+0x60/0x60
ret_from_fork+0x22/0x30
---[ end trace 3cefecf5d9d20b50 ]---
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WARNING: CPU: 0 PID: 758 at fs/fs-writeback.c:2472
__writeback_inodes_sb_nr+0xb8/0xd0
Modules linked in: iTCO_wdt wireguard curve25519_x86_64 libchacha20poly1305
intel_pmc_bxt iTCO_vendor_support chacha_x86_64 poly1305_x86_64 libblake2s
blake2s_x86_>
CPU: 0 PID: 758 Comm: journal-offline Tainted: G W
5.10.26-1-MANJARO #1
Hardware name: Hetzner vServer, BIOS 20171111 11/11/2017
RIP: 0010:__writeback_inodes_sb_nr+0xb8/0xd0
Code: 0f b6 d1 48 8d 74 24 10 e8 35 fc ff ff 48 89 e7 e8 7d fb ff ff 48 8b 44 24 48 65
48 2b 04 25 28 00 00 00 75 09 48 83 c4 50 c3 <0f> 0b eb cf e8 df 8c 75 00 66>
RSP: 0018:ffffb1f540d7fd40 EFLAGS: 00010246
RAX: 0000000000000000 RBX: ffff961185aa5488 RCX: 0000000000000000
RDX: 0000000000000002 RSI: 0000000000004be5 RDI: ffff9611b7220000
RBP: ffff961182209208 R08: ffff961184efc800 R09: 0000000000000140
R10: ffff9611859e6400 R11: ffff961192af3c10 R12: ffff961183891200
R13: ffff961185aa5000 R14: ffff961185aa5460 R15: ffff9611b65d5e10
FS: 00007f654b80e640(0000) GS:ffff9611fac00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f654cf39010 CR3: 0000000003884000 CR4: 00000000003506f0
Call Trace:
btrfs_commit_transaction+0x448/0xbc0 [btrfs]
? btrfs_wait_ordered_range+0x1b8/0x210 [btrfs]
? btrfs_sync_file+0x2b8/0x4e0 [btrfs]
btrfs_sync_file+0x343/0x4e0 [btrfs]
__x64_sys_fsync+0x34/0x60
do_syscall_64+0x33/0x40
entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x7f654cf26deb
Code: 4a 00 00 00 0f 05 48 3d 00 f0 ff ff 77 41 c3 48 83 ec 18 89 7c 24 0c e8 33 f7 ff
ff 8b 7c 24 0c 41 89 c0 b8 4a 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 35 44 89>
RSP: 002b:00007f654b80db10 EFLAGS: 00000293 ORIG_RAX: 000000000000004a
RAX: ffffffffffffffda RBX: 00005636c966b410 RCX: 00007f654cf26deb
RDX: 0000000000000002 RSI: 00007f654d169d43 RDI: 0000000000000016
RBP: 00007f654d16c6f0 R08: 0000000000000000 R09: 00007f654b80e640
R10: 0000000000000003 R11: 0000000000000293 R12: 0000000000000002
R13: 00007ffc8bd7461f R14: 0000000000000000 R15: 00007f654b80e640
---[ end trace 3cefecf5d9d20b84 ]---
This is a KVM guest on an AMD host. A similar machine on an Intel host doesn't
show this.
There is a single BTRFS filesystem on LUKS. It has been created like:
mkfs.btrfs --csum blake2 -d single -m single /dev/mapper/rootfs
I've tested Manjaro's 5.11.10 kernel too. No change. btrfs-check (5.11.1) shows
nothing.
I've even recreated the filesystem. No change. Maybe the machine without
warnings uses
the default hash. How can I find out?
Thanks!
Markus
