After mounting a btrfs file system, exporting it via nfs, and then using that for storing steam games, I get this in the nfs server dmesg (and hanging file systems):
[ 195.828931] BTRFS info (device sdf1): use zstd compression, level 3
[ 195.828937] BTRFS info (device sdf1): using free space tree
[ 195.828938] BTRFS info (device sdf1): has skinny extents
[ 195.978057] BTRFS info (device sdf1): regular block device /dev/sdf1, 11179 emulated zones of 268435456 bytes
[ 195.978117] BTRFS info (device sdf1): regular block device /dev/sdd1, 14905 emulated zones of 268435456 bytes
[ 196.517424] BTRFS info (device sdf1): zoned mode enabled with zone size 268435456
[ 911.066516] BTRFS info (device sdf1): use zstd compression, level 3
[ 911.066523] BTRFS info (device sdf1): using free space tree
[ 911.066524] BTRFS info (device sdf1): has skinny extents
[ 911.224659] BTRFS info (device sdf1): regular block device /dev/sdf1, 11179 emulated zones of 268435456 bytes
[ 911.224718] BTRFS info (device sdf1): regular block device /dev/sdd1, 14905 emulated zones of 268435456 bytes
[ 911.778374] BTRFS info (device sdf1): zoned mode enabled with zone size 268435456
[ 1048.162414] divide error: 0000 [#1] PREEMPT SMP NOPTI
[ 1048.162433] CPU: 0 PID: 1817 Comm: nfsd Tainted: P O 5.19.0-21-generic #21-Ubuntu
[ 1048.162443] Hardware name: ASUS ESC500 G3/P9D WS, BIOS 2402 06/27/2018
[ 1048.162447] RIP: 0010:btrfs_delalloc_reserve_metadata+0xba/0x3d0 [btrfs]
[ 1048.162663] Code: 44 20 ff 45 8b a5 f8 0c 00 00 48 f7 da 48 89 cf 49 8b 8d 08 0d 00 00 48 21 d7 48 21 c2 48 89 55 c8 48 8d 44 0f ff 31 d2 89 c9 <48> f7 f1 48 89 7d a8 48 89 45 b8 89 c0 41 83 fc 3f 0f 87 bd 31 02
[ 1048.162671] RSP: 0018:ffffa355881a7a50 EFLAGS: 00010246
[ 1048.162681] RAX: 0000000000001fff RBX: ffff973cd41054f0 RCX: 0000000000000000
[ 1048.162688] RDX: 0000000000000000 RSI: 0000000000002000 RDI: 0000000000002000
[ 1048.162693] RBP: ffffa355881a7ac0 R08: 0000000000000000 R09: 0000000000000000
[ 1048.162698] R10: 0000000000000000 R11: 0000000000000000 R12: 000000000000000c
[ 1048.162703] R13: ffff973a98bb3000 R14: 0000000000000000 R15: 0000000000000005
[ 1048.162709] FS: 0000000000000000(0000) GS:ffff973d2f400000(0000) knlGS:0000000000000000
[ 1048.162716] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 1048.162722] CR2: 000000c00014d000 CR3: 00000002c4c10003 CR4: 00000000001706f0
[ 1048.162729] Call Trace:
[ 1048.162734] <TASK>
[ 1048.162743] ? btrfs_qgroup_reserve_data+0x21/0x80 [btrfs]
[ 1048.162933] btrfs_buffered_write+0x291/0x960 [btrfs]
[ 1048.163085] btrfs_do_write_iter+0x1df/0x230 [btrfs]
[ 1048.163233] btrfs_file_write_iter+0x10/0x20 [btrfs]
[ 1048.163379] do_iter_readv_writev+0x12a/0x1a0
[ 1048.163394] do_iter_write+0x9d/0x170
[ 1048.163406] vfs_iter_write+0x19/0x40
[ 1048.163416] nfsd_vfs_write+0x1ad/0x5b0 [nfsd]
[ 1048.163506] nfsd_write+0x8c/0x180 [nfsd]
[ 1048.163579] nfsd3_proc_write+0xe3/0x1a0 [nfsd]
[ 1048.163660] nfsd_dispatch+0x15f/0x280 [nfsd]
[ 1048.163728] svc_process_common+0x2a3/0x640 [sunrpc]
[ 1048.163856] ? svc_handle_xprt+0x166/0x370 [sunrpc]
[ 1048.163990] ? nfsd_svc+0x1b0/0x1b0 [nfsd]
[ 1048.164059] ? nfsd_shutdown_threads+0xb0/0xb0 [nfsd]
[ 1048.164126] svc_process+0xba/0x110 [sunrpc]
[ 1048.164245] nfsd+0xdc/0x1b0 [nfsd]
[ 1048.164314] kthread+0xe6/0x110
[ 1048.164328] ? kthread_complete_and_exit+0x20/0x20
[ 1048.164340] ret_from_fork+0x1f/0x30
[ 1048.164357] </TASK>
[ 1048.164361] Modules linked in: rpcsec_gss_krb5 xt_nat veth snd_seq_dummy snd_hrtimer nf_conntrack_netlink xfrm_user xfrm_algo xt_addrtype br_netfilter xt_CHECKSUM xt_MASQUERADE xt_conntrack ipt_REJECT nf_reject_ipv4 xt_tcpudp nft_compat nft_chain_nat nf_nat nf_conntrack nf_defrag_ipv6 nf_defrag_ipv4 nf_tables nfnetlink bridge stp llc overlay binfmt_misc zfs(PO) zunicode(PO) zzstd(O) zlua(O) zavl(PO) icp(PO) zcommon(PO) znvpair(PO) spl(O) snd_hda_codec_realtek snd_hda_codec_generic ledtrig_audio snd_hda_codec_hdmi snd_hda_intel snd_intel_dspcfg snd_intel_sdw_acpi snd_hda_codec intel_rapl_msr intel_rapl_common snd_hda_core snd_hwdep x86_pkg_temp_thermal snd_pcm intel_powerclamp coretemp snd_seq_midi snd_seq_midi_event mei_pxp mei_hdcp snd_rawmidi kvm_intel input_leds snd_seq kvm snd_seq_device snd_timer rapl cmdlinepart eeepc_wmi intel_cstate at24 wmi_bmof spi_nor snd mtd mei_me soundcore mei mac_hid ie31200_edac msr nfsd parport_pc auth_rpcgss ppdev nfs_acl lockd lp parport grace ramoops
[ 1048.164559] pstore_blk reed_solomon pstore_zone efi_pstore sunrpc ip_tables x_tables autofs4 btrfs blake2b_generic raid10 raid456 async_raid6_recov async_memcpy async_pq async_xor async_tx xor raid6_pq libcrc32c raid1 raid0 multipath linear i915 drm_buddy ttm drm_display_helper cec rc_core drm_kms_helper crct10dif_pclmul syscopyarea crc32_pclmul sysfillrect hid_generic spi_intel_platform sysimgblt ghash_clmulni_intel mfd_aaeon usbhid spi_intel fb_sys_fops firewire_ohci igb aesni_intel asus_wmi sparse_keymap hid ahci dca i2c_i801 crypto_simd xhci_pci drm firewire_core platform_profile mxm_wmi crc_itu_t xhci_pci_renesas i2c_smbus i2c_algo_bit libahci cryptd lpc_ich wmi video
[ 1048.164712] ---[ end trace 0000000000000000 ]---
[ 1048.164718] RIP: 0010:btrfs_delalloc_reserve_metadata+0xba/0x3d0 [btrfs]
[ 1048.164908] Code: 44 20 ff 45 8b a5 f8 0c 00 00 48 f7 da 48 89 cf 49 8b 8d 08 0d 00 00 48 21 d7 48 21 c2 48 89 55 c8 48 8d 44 0f ff 31 d2 89 c9 <48> f7 f1 48 89 7d a8 48 89 45 b8 89 c0 41 83 fc 3f 0f 87 bd 31 02
[ 1048.164915] RSP: 0018:ffffa355881a7a50 EFLAGS: 00010246
[ 1048.164923] RAX: 0000000000001fff RBX: ffff973cd41054f0 RCX: 0000000000000000
[ 1048.164929] RDX: 0000000000000000 RSI: 0000000000002000 RDI: 0000000000002000
[ 1048.164934] RBP: ffffa355881a7ac0 R08: 0000000000000000 R09: 0000000000000000
[ 1048.164939] R10: 0000000000000000 R11: 0000000000000000 R12: 000000000000000c
[ 1048.164944] R13: ffff973a98bb3000 R14: 0000000000000000 R15: 0000000000000005
[ 1048.164950] FS: 0000000000000000(0000) GS:ffff973d2f400000(0000) knlGS:0000000000000000
[ 1048.164956] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 1048.164962] CR2: 000000c00014d000 CR3: 00000002c4c10003 CR4: 00000000001706f0
root@srv:/steam/SteamLibrary/steamapps#
ProblemType: Bug
DistroRelease: Ubuntu 22.10
Package: linux-image-5.19.0-21-generic 5.19.0-21.21
ProcVersionSignature: Ubuntu 5.19.0-21.21-generic 5.19.7
Uname: Linux 5.19.0-21-generic x86_64
NonfreeKernelModules: zfs zunicode zavl icp zcommon znvpair
ApportVersion: 2.23.1-0ubuntu3
Architecture: amd64
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/controlC1: hch 2215 F.... wireplumber
/dev/snd/controlC0: hch 2215 F.... wireplumber
/dev/snd/seq: hch 2213 F.... pipewire
CasperMD5CheckResult: unknown
CurrentDesktop: ubuntu:GNOME
Date: Thu Oct 20 19:16:24 2022
InstallationDate: Installed on 2017-11-30 (1785 days ago)
InstallationMedia: Kubuntu 17.10 "Artful Aardvark" - Release amd64 (20171017.1)
MachineType: ASUS ESC500 G3
ProcFB: 0 i915drmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-5.19.0-21-generic root=UUID=5db5122e-ce54-4e05-8c3a-45bd3abcb639 ro mitigations=off
PulseList: Error: command ['pacmd', 'list'] failed with exit code 1: No PulseAudio daemon running, or not running as session daemon.
RelatedPackageVersions:
linux-restricted-modules-5.19.0-21-generic N/A
linux-backports-modules-5.19.0-21-generic N/A
linux-firmware 20220923.gitf09bebf3-0ubuntu1
RfKill:
SourcePackage: linux
UpgradeStatus: Upgraded to kinetic on 2022-10-14 (6 days ago)
dmi.bios.date: 06/27/2018
dmi.bios.release: 4.6
dmi.bios.vendor: ASUSTeK COMPUTER INC. (Licensed from AMI)
dmi.bios.version: 2402
dmi.board.asset.tag: To be filled by O.E.M.
dmi.board.name: P9D WS
dmi.board.vendor: ASUSTeK COMPUTER INC.
dmi.board.version: Rev 1.xx
dmi.chassis.asset.tag: Asset-1234567890
dmi.chassis.type: 3
dmi.chassis.vendor: Chassis Manufacture
dmi.chassis.version: Chassis Version
dmi.modalias: dmi:bvnASUSTeKCOMPUTERINC.(LicensedfromAMI):bvr2402:bd06/27/2018:br4.6:svnASUS:pnESC500G3:pvrSystemVersion:rvnASUSTeKCOMPUTERINC.:rnP9DWS:rvrRev1.xx:cvnChassisManufacture:ct3:cvrChassisVersion:skuAll:
dmi.product.family: ASUS MB
dmi.product.name: ESC500 G3
dmi.product.sku: All
dmi.product.version: System Version
dmi.sys.vendor: ASUS
This change was made by a bot.