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Message #25369
[Bug 1781364] Re: Kernel error "task zfs:pid blocked for more than 120 seconds"
This bug was fixed in the package linux - 4.17.0-6.7
---------------
linux (4.17.0-6.7) cosmic; urgency=medium
* linux: 4.17.0-6.7 -proposed tracker (LP: #1783396)
* [Regression] EXT4-fs error (device sda2): ext4_validate_block_bitmap:383:
comm stress-ng: bg 4705: bad block bitmap checksum (LP: #1781709)
- SAUCE: Revert "UBUNTU: SAUCE: ext4: fix ext4_validate_inode_bitmap: comm
stress-ng: Corrupt inode bitmap"
- SAUCE: ext4: check for allocation block validity with block group locked
* Cosmic update to 4.17.9 stable release (LP: #1783201)
- userfaultfd: hugetlbfs: fix userfaultfd_huge_must_wait() pte access
- mm: hugetlb: yield when prepping struct pages
- mm: teach dump_page() to correctly output poisoned struct pages
- PCI / ACPI / PM: Resume bridges w/o drivers on suspend-to-RAM
- ACPICA: Drop leading newlines from error messages
- ACPI / battery: Safe unregistering of hooks
- drm/amdgpu: Make struct amdgpu_atif private to amdgpu_acpi.c
- tracing: Avoid string overflow
- tracing: Fix missing return symbol in function_graph output
- scsi: sg: mitigate read/write abuse
- scsi: aacraid: Fix PD performance regression over incorrect qd being set
- scsi: target: Fix truncated PR-in ReadKeys response
- s390: Correct register corruption in critical section cleanup
- drbd: fix access after free
- vfio: Use get_user_pages_longterm correctly
- ARM: dts: imx51-zii-rdu1: fix touchscreen pinctrl
- ARM: dts: omap3: Fix am3517 mdio and emac clock references
- ARM: dts: dra7: Disable metastability workaround for USB2
- cifs: Fix use after free of a mid_q_entry
- cifs: Fix memory leak in smb2_set_ea()
- cifs: Fix slab-out-of-bounds in send_set_info() on SMB2 ACE setting
- cifs: Fix infinite loop when using hard mount option
- drm: Use kvzalloc for allocating blob property memory
- drm/udl: fix display corruption of the last line
- drm/amdgpu: Add amdgpu_atpx_get_dhandle()
- drm/amdgpu: Dynamically probe for ATIF handle (v2)
- jbd2: don't mark block as modified if the handle is out of credits
- ext4: add corruption check in ext4_xattr_set_entry()
- ext4: always verify the magic number in xattr blocks
- ext4: make sure bitmaps and the inode table don't overlap with bg
descriptors
- ext4: always check block group bounds in ext4_init_block_bitmap()
- ext4: only look at the bg_flags field if it is valid
- ext4: verify the depth of extent tree in ext4_find_extent()
- ext4: include the illegal physical block in the bad map ext4_error msg
- ext4: clear i_data in ext4_inode_info when removing inline data
- ext4: never move the system.data xattr out of the inode body
- ext4: avoid running out of journal credits when appending to an inline file
- ext4: add more inode number paranoia checks
- ext4: add more mount time checks of the superblock
- ext4: check superblock mapped prior to committing
- HID: i2c-hid: Fix "incomplete report" noise
- HID: hiddev: fix potential Spectre v1
- HID: debug: check length before copy_to_user()
- HID: core: allow concurrent registration of drivers
- i2c: core: smbus: fix a potential missing-check bug
- i2c: smbus: kill memory leak on emulated and failed DMA SMBus xfers
- fs: allow per-device dax status checking for filesystems
- dax: change bdev_dax_supported() to support boolean returns
- dax: check for QUEUE_FLAG_DAX in bdev_dax_supported()
- dm: prevent DAX mounts if not supported
- mtd: cfi_cmdset_0002: Change definition naming to retry write operation
- mtd: cfi_cmdset_0002: Change erase functions to retry for error
- mtd: cfi_cmdset_0002: Change erase functions to check chip good only
- netfilter: nf_log: don't hold nf_log_mutex during user access
- staging: comedi: quatech_daqp_cs: fix no-op loop daqp_ao_insn_write()
- Revert mm/vmstat.c: fix vmstat_update() preemption BUG
- Linux 4.17.6
- bpf: reject passing modified ctx to helper functions
- MIPS: Call dump_stack() from show_regs()
- MIPS: Use async IPIs for arch_trigger_cpumask_backtrace()
- MIPS: Fix ioremap() RAM check
- drm/etnaviv: Check for platform_device_register_simple() failure
- drm/etnaviv: Fix driver unregistering
- drm/etnaviv: bring back progress check in job timeout handler
- ACPICA: Clear status of all events when entering S5
- mmc: sdhci-esdhc-imx: allow 1.8V modes without 100/200MHz pinctrl states
- mmc: dw_mmc: fix card threshold control configuration
- mmc: renesas_sdhi_internal_dmac: Cannot clear the RX_IN_USE in abort
- ibmasm: don't write out of bounds in read handler
- staging: rtl8723bs: Prevent an underflow in rtw_check_beacon_data().
- staging: r8822be: Fix RTL8822be can't find any wireless AP
- ata: Fix ZBC_OUT command block check
- ata: Fix ZBC_OUT all bit handling
- mei: discard messages from not connected client during power down.
- mtd: spi-nor: cadence-quadspi: Fix direct mode write timeouts
- tracing/kprobe: Release kprobe print_fmt properly
- vmw_balloon: fix inflation with batching
- ahci: Add Intel Ice Lake LP PCI ID
- ahci: Disable LPM on Lenovo 50 series laptops with a too old BIOS
- thunderbolt: Notify userspace when boot_acl is changed
- USB: serial: ch341: fix type promotion bug in ch341_control_in()
- USB: serial: cp210x: add another USB ID for Qivicon ZigBee stick
- USB: serial: keyspan_pda: fix modem-status error handling
- USB: yurex: fix out-of-bounds uaccess in read handler
- USB: serial: mos7840: fix status-register error handling
- usb: quirks: add delay quirks for Corsair Strafe
- xhci: xhci-mem: off by one in xhci_stream_id_to_ring()
- Fix up non-directory creation in SGID directories
- mm: zero unavailable pages before memmap init
- ALSA: hda/realtek - two more lenovo models need fixup of MIC_LOCATION
- ALSA: hda - Handle pm failure during hotplug
- mm: do not drop unused pages when userfaultd is running
- fs/proc/task_mmu.c: fix Locked field in /proc/pid/smaps*
- x86/purgatory: add missing FORCE to Makefile target
- fs, elf: make sure to page align bss in load_elf_library
- mm: do not bug_on on incorrect length in __mm_populate()
- tracing: Reorder display of TGID to be after PID
- kbuild: delete INSTALL_FW_PATH from kbuild documentation
- acpi, nfit: Fix scrub idle detection
- arm64: neon: Fix function may_use_simd() return error status
- tools build: fix # escaping in .cmd files for future Make
- IB/hfi1: Fix incorrect mixing of ERR_PTR and NULL return values
- i2c: tegra: Fix NACK error handling
- i2c: recovery: if possible send STOP with recovery pulses
- iw_cxgb4: correctly enforce the max reg_mr depth
- xen: remove global bit from __default_kernel_pte_mask for pv guests
- xen: setup pv irq ops vector earlier
- bsg: fix bogus EINVAL on non-data commands
- crypto: x86/salsa20 - remove x86 salsa20 implementations
- uprobes/x86: Remove incorrect WARN_ON() in uprobe_init_insn()
- netfilter: nf_queue: augment nfqa_cfg_policy
- crypto: don't optimize keccakf()
- netfilter: x_tables: initialise match/target check parameter struct
- loop: add recursion validation to LOOP_CHANGE_FD
- xfs: fix inobt magic number check
- PM / hibernate: Fix oops at snapshot_write()
- RDMA/ucm: Mark UCM interface as BROKEN
- loop: remember whether sysfs_create_group() was done
- kvm: vmx: Nested VM-entry prereqs for event inj.
- f2fs: give message and set need_fsck given broken node id
- f2fs: avoid bug_on on corrupted inode
- f2fs: sanity check on sit entry
- f2fs: sanity check for total valid node blocks
- ARM: dts: armada-38x: use the new thermal binding
- Linux 4.17.7
- mm: don't do zero_resv_unavail if memmap is not allocated
- Linux 4.17.8
- compiler-gcc.h: Add __attribute__((gnu_inline)) to all inline declarations
- x86/asm: Add _ASM_ARG* constants for argument registers to <asm/asm.h>
- x86/paravirt: Make native_save_fl() extern inline
- pinctrl: sh-pfc: r8a77970: remove SH_PFC_PIN_CFG_DRIVE_STRENGTH flag
- pinctrl: mt7622: fix error path on failing at groups building
- pinctrl: mt7622: stop using the deprecated pinctrl_add_gpio_range
- pinctrl: mt7622: fix a kernel panic when gpio-hog is being applied
- alx: take rtnl before calling __alx_open from resume
- atm: Preserve value of skb->truesize when accounting to vcc
- atm: zatm: Fix potential Spectre v1
- hv_netvsc: split sub-channel setup into async and sync
- ipv6: sr: fix passing wrong flags to crypto_alloc_shash()
- ipvlan: fix IFLA_MTU ignored on NEWLINK
- ixgbe: split XDP_TX tail and XDP_REDIRECT map flushing
- net: dccp: avoid crash in ccid3_hc_rx_send_feedback()
- net: dccp: switch rx_tstamp_last_feedback to monotonic clock
- net: fix use-after-free in GRO with ESP
- net: macb: Fix ptp time adjustment for large negative delta
- net/mlx5e: Avoid dealing with vport representors if not being e-switch
manager
- net/mlx5e: Don't attempt to dereference the ppriv struct if not being
eswitch manager
- net/mlx5: E-Switch, Avoid setup attempt if not being e-switch manager
- net/mlx5: Fix command interface race in polling mode
- net/mlx5: Fix incorrect raw command length parsing
- net/mlx5: Fix required capability for manipulating MPFS
- net/mlx5: Fix wrong size allocation for QoS ETC TC regitster
- net: mvneta: fix the Rx desc DMA address in the Rx path
- net/packet: fix use-after-free
- net/sched: act_ife: fix recursive lock and idr leak
- net/sched: act_ife: preserve the action control in case of error
- net_sched: blackhole: tell upper qdisc about dropped packets
- net: sungem: fix rx checksum support
- net/tcp: Fix socket lookups with SO_BINDTODEVICE
- qede: Adverstise software timestamp caps when PHC is not available.
- qed: Fix setting of incorrect eswitch mode.
- qed: Fix use of incorrect size in memcpy call.
- qed: Limit msix vectors in kdump kernel to the minimum required count.
- qmi_wwan: add support for the Dell Wireless 5821e module
- r8152: napi hangup fix after disconnect
- s390/qeth: don't clobber buffer on async TX completion
- stmmac: fix DMA channel hang in half-duplex mode
- strparser: Remove early eaten to fix full tcp receive buffer stall
- tcp: fix Fast Open key endianness
- tcp: prevent bogus FRTO undos with non-SACK flows
- vhost_net: validate sock before trying to put its fd
- VSOCK: fix loopback on big-endian systems
- hinic: reset irq affinity before freeing irq
- nfp: flower: fix mpls ether type detection
- net: macb: initialize bp->queues[0].bp for at91rm9200
- net: use dev_change_tx_queue_len() for SIOCSIFTXQLEN
- nfp: reject binding to shared blocks
- xen-netfront: Fix mismatched rtnl_unlock
- xen-netfront: Update features after registering netdev
- enic: do not overwrite error code
- i40e: split XDP_TX tail and XDP_REDIRECT map flushing
- IB/mlx5: Avoid dealing with vport representors if not being e-switch manager
- Revert "s390/qeth: use Read device to query hypervisor for MAC"
- s390/qeth: avoid using is_multicast_ether_addr_64bits on (u8 *)[6]
- s390/qeth: fix race when setting MAC address
- sfc: correctly initialise filter rwsem for farch
- virtio_net: split XDP_TX kick and XDP_REDIRECT map flushing
- x86/kvm/Kconfig: Ensure CRYPTO_DEV_CCP_DD state at minimum matches KVM_AMD
- net: cxgb3_main: fix potential Spectre v1
- rtlwifi: Fix kernel Oops "Fw download fail!!"
- rtlwifi: rtl8821ae: fix firmware is not ready to run
- net: lan78xx: Fix race in tx pending skb size calculation
- crypto: af_alg - Initialize sg_num_bytes in error code path
- PCI: hv: Disable/enable IRQs rather than BH in hv_compose_msi_msg()
- netfilter: ebtables: reject non-bridge targets
- reiserfs: fix buffer overflow with long warning messages
- KEYS: DNS: fix parsing multiple options
- tls: Stricter error checking in zerocopy sendmsg path
- autofs: fix slab out of bounds read in getname_kernel()
- nsh: set mac len based on inner packet
- netfilter: ipv6: nf_defrag: drop skb dst before queueing
- bdi: Fix another oops in wb_workfn()
- bpf: reject any prog that failed read-only lock
- rds: avoid unenecessary cong_update in loop transport
- block: don't use blocking queue entered for recursive bio submits
- bpf: sockmap, fix crash when ipv6 sock is added
- bpf: sockmap, consume_skb in close path
- bpf: don't leave partial mangled prog in jit_subprogs error path
- net/nfc: Avoid stalls when nfc_alloc_send_skb() returned NULL.
- ipvs: initialize tbl->entries after allocation
- ipvs: initialize tbl->entries in ip_vs_lblc_init_svc()
- arm/arm64: smccc: Add SMCCC-specific return codes
- arm64: Call ARCH_WORKAROUND_2 on transitions between EL0 and EL1
- arm64: Add per-cpu infrastructure to call ARCH_WORKAROUND_2
- arm64: Add ARCH_WORKAROUND_2 probing
- arm64: Add 'ssbd' command-line option
- arm64: ssbd: Add global mitigation state accessor
- arm64: ssbd: Skip apply_ssbd if not using dynamic mitigation
- arm64: ssbd: Restore mitigation status on CPU resume
- arm64: ssbd: Introduce thread flag to control userspace mitigation
- arm64: ssbd: Add prctl interface for per-thread mitigation
- arm64: KVM: Add HYP per-cpu accessors
- arm64: KVM: Add ARCH_WORKAROUND_2 support for guests
- arm64: KVM: Handle guest's ARCH_WORKAROUND_2 requests
- arm64: KVM: Add ARCH_WORKAROUND_2 discovery through ARCH_FEATURES_FUNC_ID
- bpf: enforce correct alignment for instructions
- bpf, arm32: fix to use bpf_jit_binary_lock_ro api
- bpf: undo prog rejection on read-only lock failure
- Linux 4.17.9
* linux 4.17.0-5 fails to build on ppc64el with gcc-8 (LP: #1783167)
- kbuild: add macro for controlling warnings to linux/compiler.h
- disable -Wattribute-alias warning for SYSCALL_DEFINEx()
- powerpc/64: Fix strncpy() related build failures with GCC 8.1
* Kernel error "task zfs:pid blocked for more than 120 seconds" (LP: #1781364)
- SAUCE: (noup) zfs to 0.7.9-3ubuntu4
* [Regression] EXT4-fs error (device sda1): ext4_validate_inode_bitmap:99:
comm stress-ng: Corrupt inode bitmap (LP: #1780137)
- SAUCE: ext4: fix ext4_validate_inode_bitmap: comm stress-ng: Corrupt inode
bitmap
* Miscellaneous Ubuntu changes
- SAUCE: (noup) Update spl to 0.7.9-3ubuntu2, zfs to 0.7.9-3ubuntu3
- ABI: ib_ucm is being dropped upstream
- ABI: salsa20-{x86_64,i586} modules are no longer upstream
- [Config] updateconfigs after applying stable fixes
- [Config] retpoline -- review and accept retpoline changes
* Miscellaneous upstream changes
- Revert "UBUNTU: [Config]: set CONFIG_EDAC_DEBUG=y for ARM64"
-- Thadeu Lima de Souza Cascardo <cascardo@xxxxxxxxxxxxx> Tue, 24 Jul
2018 16:02:30 -0300
** Changed in: linux (Ubuntu Cosmic)
Status: Fix Committed => Fix Released
--
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https://bugs.launchpad.net/bugs/1781364
Title:
Kernel error "task zfs:pid blocked for more than 120 seconds"
Status in Linux:
Fix Released
Status in linux package in Ubuntu:
Fix Released
Status in zfs-linux package in Ubuntu:
Fix Released
Status in linux source package in Xenial:
Fix Committed
Status in zfs-linux source package in Xenial:
Confirmed
Status in linux source package in Bionic:
Fix Committed
Status in zfs-linux source package in Bionic:
Fix Committed
Status in linux source package in Cosmic:
Fix Released
Status in zfs-linux source package in Cosmic:
Fix Released
Bug description:
== SRU Justification, XENIAL, BIONIC ==
Exercising ZFS with lxd with many mount/umounts can cause lockups and
120 second timeout messages.
== How to reproduce bug ==
In a VM, 2 CPUs, 16GB of memory running Bionic:
sudo apt update
sudo apt install lxd lxd-client lxd-tools zfsutils-linux
sudo lxd init
(and with the default init options)
then run:
lxd-benchmark launch --count 96 --parallel 96
This will reliably show the lockup every time without the fix. With
the fix (detailed below) one cannot reproduce the lockup.
== Fix ==
Upstream ZFS commit
commit ac09630d8b0bf6c92084a30fdaefd03fd0adbdc1
Author: Brian Behlendorf <behlendorf1@xxxxxxxx>
Date: Wed Jul 11 15:49:10 2018 -0700
Fix zpl_mount() deadlock
== Regression Potential ==
This just changes the locking in the mount path of ZFS and will only
affect ZFS mount/unmounts. The regression potential is small as this
touches a very small code path that has been exhaustively exercises
this code under multiple thread/CPU contention and shown not to break.
------------------
ZFS bug report: https://github.com/zfsonlinux/zfs/issues/7691
"I am using LXD containers that are configured to use a ZFS storage backend.
I create many containers using a benchmark tool, which probably stresses the use of ZFS.
In two out of four attempts, I got
[ 725.970508] INFO: task lxd:4455 blocked for more than 120 seconds.
[ 725.976730] Tainted: P O 4.15.0-20-generic #21-Ubuntu
[ 725.983551] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
[ 725.991624] INFO: task txg_sync:4202 blocked for more than 120 seconds.
[ 725.998264] Tainted: P O 4.15.0-20-generic #21-Ubuntu
[ 726.005071] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
[ 726.013313] INFO: task lxd:99919 blocked for more than 120 seconds.
[ 726.019609] Tainted: P O 4.15.0-20-generic #21-Ubuntu
[ 726.026418] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
[ 726.034560] INFO: task zfs:100513 blocked for more than 120 seconds.
[ 726.040936] Tainted: P O 4.15.0-20-generic #21-Ubuntu
[ 726.047746] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
[ 726.055791] INFO: task zfs:100584 blocked for more than 120 seconds.
[ 726.062170] Tainted: P O 4.15.0-20-generic #21-Ubuntu
[ 726.068979] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
Describe how to reproduce the problem
Start an Ubuntu 18.04 LTS server.
Install LXD if not already installed.
sudo apt update
sudo apt install lxd lxd-client lxd-tools zfsutils-linux
Configure LXD with sudo lxd init. When prompted for the storage
backend, select ZFS and specify an empty disk.
$ sudo lxd init
Would you like to use LXD clustering? (yes/no) [default=no]:
Do you want to configure a new storage pool? (yes/no) [default=yes]:
Name of the new storage pool [default=default]:
Name of the storage backend to use (dir, zfs) [default=zfs]:
Create a new ZFS pool? (yes/no) [default=yes]:
Would you like to use an existing block device? (yes/no) [default=no]: yes
Path to the existing block device: /dev/sdb
Would you like to connect to a MAAS server? (yes/no) [default=no]:
Would you like to create a new local network bridge? (yes/no) [default=yes]: no
Would you like to configure LXD to use an existing bridge or host interface? (yes/no) [default=no]: no
Would you like LXD to be available over the network? (yes/no) [default=no]:
Would you like stale cached images to be updated automatically? (yes/no) [default=yes]
Would you like a YAML "lxd init" preseed to be printed? (yes/no) [default=no]:
Now run the following to launch 48 containers in batches of 12.
lxd-benchmark launch --count 48 --parallel 12
In two out of four attempts, I got the kernel errors.
I also tried
echo 1 >/sys/module/spl/parameters/spl_taskq_kick
but did not manage to continue.
Include any warning/errors/backtraces from the system logs
dmesg output
[ 725.970508] INFO: task lxd:4455 blocked for more than 120 seconds.
[ 725.976730] Tainted: P O 4.15.0-20-generic #21-Ubuntu
[ 725.983551] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
[ 725.991408] lxd D 0 4455 1 0x00000000
[ 725.991412] Call Trace:
[ 725.991424] __schedule+0x297/0x8b0
[ 725.991428] schedule+0x2c/0x80
[ 725.991429] rwsem_down_write_failed+0x162/0x360
[ 725.991460] ? dbuf_rele_and_unlock+0x1a8/0x4b0 [zfs]
[ 725.991465] call_rwsem_down_write_failed+0x17/0x30
[ 725.991468] ? call_rwsem_down_write_failed+0x17/0x30
[ 725.991469] down_write+0x2d/0x40
[ 725.991472] grab_super+0x30/0x90
[ 725.991501] ? zpl_create+0x160/0x160 [zfs]
[ 725.991504] sget_userns+0x91/0x490
[ 725.991507] ? get_anon_bdev+0x100/0x100
[ 725.991534] ? zpl_create+0x160/0x160 [zfs]
[ 725.991537] sget+0x7d/0xa0
[ 725.991540] ? get_anon_bdev+0x100/0x100
[ 725.991567] zpl_mount+0xa8/0x160 [zfs]
[ 725.991570] mount_fs+0x37/0x150
[ 725.991574] vfs_kern_mount.part.23+0x5d/0x110
[ 725.991576] do_mount+0x5ed/0xce0
[ 725.991577] ? copy_mount_options+0x2c/0x220
[ 725.991578] SyS_mount+0x98/0xe0
[ 725.991582] do_syscall_64+0x73/0x130
[ 725.991583] entry_SYSCALL_64_after_hwframe+0x3d/0xa2
[ 725.991585] RIP: 0033:0x4dbd5a
[ 725.991586] RSP: 002b:000000c428be6890 EFLAGS: 00000206 ORIG_RAX: 00000000000000a5
[ 725.991588] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00000000004dbd5a
[ 725.991589] RDX: 000000c421a04b7c RSI: 000000c426f94f40 RDI: 000000c4274ceaa0
[ 725.991590] RBP: 000000c428be6930 R08: 000000c425521a90 R09: 0000000000000000
[ 725.991590] R10: 0000000000000000 R11: 0000000000000206 R12: ffffffffffffffff
[ 725.991591] R13: 000000000000003e R14: 000000000000003d R15: 0000000000000080
[ 725.991624] INFO: task txg_sync:4202 blocked for more than 120 seconds.
[ 725.998264] Tainted: P O 4.15.0-20-generic #21-Ubuntu
[ 726.005071] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
[ 726.012928] txg_sync D 0 4202 2 0x80000000
[ 726.012930] Call Trace:
[ 726.012933] __schedule+0x297/0x8b0
[ 726.012939] schedule+0x2c/0x80
[ 726.012945] cv_wait_common+0x11e/0x140 [spl]
[ 726.012948] ? wait_woken+0x80/0x80
[ 726.012954] __cv_wait+0x15/0x20 [spl]
[ 726.012981] rrw_enter_write+0x3c/0xa0 [zfs]
[ 726.013006] rrw_enter+0x13/0x20 [zfs]
[ 726.013033] spa_sync+0x7c9/0xd80 [zfs]
[ 726.013062] txg_sync_thread+0x2cd/0x4a0 [zfs]
[ 726.013089] ? txg_quiesce_thread+0x3d0/0x3d0 [zfs]
[ 726.013093] thread_generic_wrapper+0x74/0x90 [spl]
[ 726.013098] kthread+0x121/0x140
[ 726.013101] ? __thread_exit+0x20/0x20 [spl]
[ 726.013103] ? kthread_create_worker_on_cpu+0x70/0x70
[ 726.013104] ret_from_fork+0x22/0x40
[ 726.013313] INFO: task lxd:99919 blocked for more than 120 seconds.
[ 726.019609] Tainted: P O 4.15.0-20-generic #21-Ubuntu
[ 726.026418] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
[ 726.034272] lxd D 0 99919 99626 0x00000000
[ 726.034274] Call Trace:
[ 726.034277] __schedule+0x297/0x8b0
[ 726.034283] ? __wake_up_common+0x73/0x130
[ 726.034286] schedule+0x2c/0x80
[ 726.034290] cv_wait_common+0x11e/0x140 [spl]
[ 726.034293] ? wait_woken+0x80/0x80
[ 726.034297] __cv_wait+0x15/0x20 [spl]
[ 726.034322] txg_wait_synced+0xdd/0x130 [zfs]
[ 726.034349] zil_create+0x249/0x300 [zfs]
[ 726.034376] zil_commit_writer+0x6d1/0x7c0 [zfs]
[ 726.034401] zil_commit.part.14+0x93/0x100 [zfs]
[ 726.034429] zil_commit+0x17/0x20 [zfs]
[ 726.034457] zfs_sync+0x6e/0xb0 [zfs]
[ 726.034484] zpl_sync_fs+0x50/0x80 [zfs]
[ 726.034490] __sync_filesystem+0x33/0x60
[ 726.034493] sync_filesystem+0x39/0x40
[ 726.034495] generic_shutdown_super+0x27/0x120
[ 726.034496] kill_anon_super+0x12/0x20
[ 726.034518] zpl_kill_sb+0x1a/0x20 [zfs]
[ 726.034524] deactivate_locked_super+0x48/0x80
[ 726.034529] deactivate_super+0x40/0x60
[ 726.034532] cleanup_mnt+0x3f/0x80
[ 726.034534] __cleanup_mnt+0x12/0x20
[ 726.034535] task_work_run+0x9d/0xc0
[ 726.034537] exit_to_usermode_loop+0xc0/0xd0
[ 726.034539] do_syscall_64+0x115/0x130
[ 726.034542] entry_SYSCALL_64_after_hwframe+0x3d/0xa2
[ 726.034550] RIP: 0033:0x7fb553b3e8c7
[ 726.034551] RSP: 002b:00007fff426c5388 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
[ 726.034553] RAX: 0000000000000000 RBX: 000000000000000f RCX: 00007fb553b3e8c7
[ 726.034553] RDX: 00007fb55476eb9f RSI: 0000000000000002 RDI: 00007fb554770b6b
[ 726.034554] RBP: 000000000000000c R08: 0000000000000000 R09: 00007fb553b8ae67
[ 726.034555] R10: 0000000000084000 R11: 0000000000000246 R12: 00007fff426c64a0
[ 726.034555] R13: 0000000003176690 R14: 0000000003177810 R15: 00000000031741f0
[ 726.034560] INFO: task zfs:100513 blocked for more than 120 seconds.
[ 726.040936] Tainted: P O 4.15.0-20-generic #21-Ubuntu
[ 726.047746] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
[ 726.055600] zfs D 0 100513 2626 0x00000000
[ 726.055602] Call Trace:
[ 726.055606] __schedule+0x297/0x8b0
[ 726.055609] schedule+0x2c/0x80
[ 726.055613] cv_wait_common+0x11e/0x140 [spl]
[ 726.055615] ? wait_woken+0x80/0x80
[ 726.055619] __cv_wait+0x15/0x20 [spl]
[ 726.055642] rrw_enter_read_impl+0x4e/0x160 [zfs]
[ 726.055666] rrw_enter+0x1c/0x20 [zfs]
[ 726.055691] dsl_pool_hold+0x5a/0x80 [zfs]
[ 726.055713] dmu_objset_hold+0x33/0xa0 [zfs]
[ 726.055740] zfs_ioc_objset_stats+0x32/0xa0 [zfs]
[ 726.055766] zfsdev_ioctl+0x1e0/0x610 [zfs]
[ 726.055771] do_vfs_ioctl+0xa8/0x630
[ 726.055774] ? handle_mm_fault+0xb1/0x1f0
[ 726.055776] ? __do_page_fault+0x270/0x4d0
[ 726.055777] SyS_ioctl+0x79/0x90
[ 726.055779] do_syscall_64+0x73/0x130
[ 726.055781] entry_SYSCALL_64_after_hwframe+0x3d/0xa2
[ 726.055782] RIP: 0033:0x7fd4adc795d7
[ 726.055782] RSP: 002b:00007ffe356b8718 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
[ 726.055783] RAX: ffffffffffffffda RBX: 00007ffe356b8740 RCX: 00007fd4adc795d7
[ 726.055784] RDX: 00007ffe356b8740 RSI: 0000000000005a12 RDI: 0000000000000003
[ 726.055785] RBP: 000055632e278660 R08: 000000000000ffff R09: 00007fd4adcd1ed0
[ 726.055785] R10: 2f746c7561666564 R11: 0000000000000246 R12: 000055632e278660
[ 726.055788] R13: 00007ffe356beec0 R14: 00007fd4af1756e0 R15: 00007ffe356bbe30
[ 726.055791] INFO: task zfs:100584 blocked for more than 120 seconds.
[ 726.062170] Tainted: P O 4.15.0-20-generic #21-Ubuntu
[ 726.068979] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
[ 726.076835] zfs D 0 100584 15513 0x00000000
[ 726.076837] Call Trace:
[ 726.076840] __schedule+0x297/0x8b0
[ 726.076845] schedule+0x2c/0x80
[ 726.076851] cv_wait_common+0x11e/0x140 [spl]
[ 726.076854] ? wait_woken+0x80/0x80
[ 726.076859] __cv_wait+0x15/0x20 [spl]
[ 726.076881] rrw_enter_read_impl+0x4e/0x160 [zfs]
[ 726.076905] rrw_enter+0x1c/0x20 [zfs]
[ 726.076929] dsl_pool_hold+0x5a/0x80 [zfs]
[ 726.076951] dmu_objset_hold+0x33/0xa0 [zfs]
[ 726.076977] zfs_ioc_objset_stats+0x32/0xa0 [zfs]
[ 726.077001] zfsdev_ioctl+0x1e0/0x610 [zfs]
[ 726.077005] do_vfs_ioctl+0xa8/0x630
[ 726.077006] ? handle_mm_fault+0xb1/0x1f0
[ 726.077008] ? __do_page_fault+0x270/0x4d0
[ 726.077010] SyS_ioctl+0x79/0x90
[ 726.077011] do_syscall_64+0x73/0x130
[ 726.077013] entry_SYSCALL_64_after_hwframe+0x3d/0xa2
[ 726.077014] RIP: 0033:0x7fc2734075d7
[ 726.077014] RSP: 002b:00007fff653a4b08 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
[ 726.077015] RAX: ffffffffffffffda RBX: 00007fff653a4b30 RCX: 00007fc2734075d7
[ 726.077016] RDX: 00007fff653a4b30 RSI: 0000000000005a12 RDI: 0000000000000003
[ 726.077017] RBP: 000055f3576e9660 R08: 000000000000ffff R09: 00007fc27345fed0
[ 726.077017] R10: 2f746c7561666564 R11: 0000000000000246 R12: 000055f3576e9660
[ 726.077018] R13: 00007fff653aaec0 R14: 00007fc2749036e0 R15: 00007fff653a8220
[ 846.801124] INFO: task lxd:4455 blocked for more than 120 seconds.
[ 846.807352] Tainted: P O 4.15.0-20-generic #21-Ubuntu
[ 846.814170] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
[ 846.822028] lxd D 0 4455 1 0x00000000
[ 846.822031] Call Trace:
[ 846.822042] __schedule+0x297/0x8b0
[ 846.822045] schedule+0x2c/0x80
[ 846.822047] rwsem_down_write_failed+0x162/0x360
[ 846.822078] ? dbuf_rele_and_unlock+0x1a8/0x4b0 [zfs]
[ 846.822083] call_rwsem_down_write_failed+0x17/0x30
[ 846.822086] ? call_rwsem_down_write_failed+0x17/0x30
[ 846.822087] down_write+0x2d/0x40
[ 846.822091] grab_super+0x30/0x90
[ 846.822118] ? zpl_create+0x160/0x160 [zfs]
[ 846.822121] sget_userns+0x91/0x490
[ 846.822123] ? get_anon_bdev+0x100/0x100
[ 846.822150] ? zpl_create+0x160/0x160 [zfs]
[ 846.822153] sget+0x7d/0xa0
[ 846.822156] ? get_anon_bdev+0x100/0x100
[ 846.822181] zpl_mount+0xa8/0x160 [zfs]
[ 846.822183] mount_fs+0x37/0x150
[ 846.822188] vfs_kern_mount.part.23+0x5d/0x110
[ 846.822189] do_mount+0x5ed/0xce0
[ 846.822190] ? copy_mount_options+0x2c/0x220
[ 846.822192] SyS_mount+0x98/0xe0
[ 846.822195] do_syscall_64+0x73/0x130
[ 846.822196] entry_SYSCALL_64_after_hwframe+0x3d/0xa2
[ 846.822198] RIP: 0033:0x4dbd5a
[ 846.822199] RSP: 002b:000000c428be6890 EFLAGS: 00000206 ORIG_RAX: 00000000000000a5
[ 846.822201] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00000000004dbd5a
[ 846.822203] RDX: 000000c421a04b7c RSI: 000000c426f94f40 RDI: 000000c4274ceaa0
[ 846.822205] RBP: 000000c428be6930 R08: 000000c425521a90 R09: 0000000000000000
[ 846.822206] R10: 0000000000000000 R11: 0000000000000206 R12: ffffffffffffffff
[ 846.822206] R13: 000000000000003e R14: 000000000000003d R15: 0000000000000080
[ 846.822239] INFO: task txg_sync:4202 blocked for more than 120 seconds.
[ 846.828882] Tainted: P O 4.15.0-20-generic #21-Ubuntu
[ 846.835692] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
[ 846.843549] txg_sync D 0 4202 2 0x80000000
[ 846.843551] Call Trace:
[ 846.843554] __schedule+0x297/0x8b0
[ 846.843560] schedule+0x2c/0x80
[ 846.843566] cv_wait_common+0x11e/0x140 [spl]
[ 846.843570] ? wait_woken+0x80/0x80
[ 846.843574] __cv_wait+0x15/0x20 [spl]
[ 846.843603] rrw_enter_write+0x3c/0xa0 [zfs]
[ 846.843629] rrw_enter+0x13/0x20 [zfs]
[ 846.843654] spa_sync+0x7c9/0xd80 [zfs]
[ 846.843682] txg_sync_thread+0x2cd/0x4a0 [zfs]
[ 846.843708] ? txg_quiesce_thread+0x3d0/0x3d0 [zfs]
[ 846.843713] thread_generic_wrapper+0x74/0x90 [spl]
[ 846.843717] kthread+0x121/0x140
[ 846.843720] ? __thread_exit+0x20/0x20 [spl]
[ 846.843721] ? kthread_create_worker_on_cpu+0x70/0x70
[ 846.843723] ret_from_fork+0x22/0x40
[ 846.843931] INFO: task lxd:99919 blocked for more than 120 seconds.
[ 846.850227] Tainted: P O 4.15.0-20-generic #21-Ubuntu
[ 846.857040] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
[ 846.864892] lxd D 0 99919 99626 0x00000000
[ 846.864894] Call Trace:
[ 846.864897] __schedule+0x297/0x8b0
[ 846.864903] ? __wake_up_common+0x73/0x130
[ 846.864906] schedule+0x2c/0x80
[ 846.864910] cv_wait_common+0x11e/0x140 [spl]
[ 846.864912] ? wait_woken+0x80/0x80
[ 846.864917] __cv_wait+0x15/0x20 [spl]
[ 846.864942] txg_wait_synced+0xdd/0x130 [zfs]
[ 846.864971] zil_create+0x249/0x300 [zfs]
[ 846.864998] zil_commit_writer+0x6d1/0x7c0 [zfs]
[ 846.865023] zil_commit.part.14+0x93/0x100 [zfs]
[ 846.865051] zil_commit+0x17/0x20 [zfs]
[ 846.865080] zfs_sync+0x6e/0xb0 [zfs]
[ 846.865107] zpl_sync_fs+0x50/0x80 [zfs]
[ 846.865111] __sync_filesystem+0x33/0x60
[ 846.865113] sync_filesystem+0x39/0x40
[ 846.865114] generic_shutdown_super+0x27/0x120
[ 846.865116] kill_anon_super+0x12/0x20
[ 846.865138] zpl_kill_sb+0x1a/0x20 [zfs]
[ 846.865140] deactivate_locked_super+0x48/0x80
[ 846.865143] deactivate_super+0x40/0x60
[ 846.865145] cleanup_mnt+0x3f/0x80
[ 846.865147] __cleanup_mnt+0x12/0x20
[ 846.865148] task_work_run+0x9d/0xc0
[ 846.865150] exit_to_usermode_loop+0xc0/0xd0
[ 846.865152] do_syscall_64+0x115/0x130
[ 846.865153] entry_SYSCALL_64_after_hwframe+0x3d/0xa2
[ 846.865154] RIP: 0033:0x7fb553b3e8c7
[ 846.865155] RSP: 002b:00007fff426c5388 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
[ 846.865156] RAX: 0000000000000000 RBX: 000000000000000f RCX: 00007fb553b3e8c7
[ 846.865158] RDX: 00007fb55476eb9f RSI: 0000000000000002 RDI: 00007fb554770b6b
[ 846.865159] RBP: 000000000000000c R08: 0000000000000000 R09: 00007fb553b8ae67
[ 846.865162] R10: 0000000000084000 R11: 0000000000000246 R12: 00007fff426c64a0
[ 846.865162] R13: 0000000003176690 R14: 0000000003177810 R15: 00000000031741f0
[ 846.865167] INFO: task zfs:100513 blocked for more than 120 seconds.
[ 846.871546] Tainted: P O 4.15.0-20-generic #21-Ubuntu
[ 846.878357] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
[ 846.886214] zfs D 0 100513 2626 0x00000000
[ 846.886215] Call Trace:
[ 846.886218] __schedule+0x297/0x8b0
[ 846.886223] schedule+0x2c/0x80
[ 846.886230] cv_wait_common+0x11e/0x140 [spl]
[ 846.886232] ? wait_woken+0x80/0x80
[ 846.886237] __cv_wait+0x15/0x20 [spl]
[ 846.886261] rrw_enter_read_impl+0x4e/0x160 [zfs]
[ 846.886284] rrw_enter+0x1c/0x20 [zfs]
[ 846.886309] dsl_pool_hold+0x5a/0x80 [zfs]
[ 846.886331] dmu_objset_hold+0x33/0xa0 [zfs]
[ 846.886357] zfs_ioc_objset_stats+0x32/0xa0 [zfs]
[ 846.886383] zfsdev_ioctl+0x1e0/0x610 [zfs]
[ 846.886388] do_vfs_ioctl+0xa8/0x630
[ 846.886391] ? handle_mm_fault+0xb1/0x1f0
[ 846.886394] ? __do_page_fault+0x270/0x4d0
[ 846.886396] SyS_ioctl+0x79/0x90
[ 846.886397] do_syscall_64+0x73/0x130
[ 846.886399] entry_SYSCALL_64_after_hwframe+0x3d/0xa2
[ 846.886400] RIP: 0033:0x7fd4adc795d7
[ 846.886402] RSP: 002b:00007ffe356b8718 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
[ 846.886405] RAX: ffffffffffffffda RBX: 00007ffe356b8740 RCX: 00007fd4adc795d7
[ 846.886406] RDX: 00007ffe356b8740 RSI: 0000000000005a12 RDI: 0000000000000003
[ 846.886406] RBP: 000055632e278660 R08: 000000000000ffff R09: 00007fd4adcd1ed0
[ 846.886407] R10: 2f746c7561666564 R11: 0000000000000246 R12: 000055632e278660
[ 846.886408] R13: 00007ffe356beec0 R14: 00007fd4af1756e0 R15: 00007ffe356bbe30
[ 846.886410] INFO: task zfs:100584 blocked for more than 120 seconds.
[ 846.892790] Tainted: P O 4.15.0-20-generic #21-Ubuntu
[ 846.899598] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
[ 846.907454] zfs D 0 100584 15513 0x00000000
[ 846.907456] Call Trace:
[ 846.907459] __schedule+0x297/0x8b0
[ 846.907465] schedule+0x2c/0x80
[ 846.907470] cv_wait_common+0x11e/0x140 [spl]
[ 846.907471] ? wait_woken+0x80/0x80
[ 846.907477] __cv_wait+0x15/0x20 [spl]
[ 846.907499] rrw_enter_read_impl+0x4e/0x160 [zfs]
[ 846.907523] rrw_enter+0x1c/0x20 [zfs]
[ 846.907547] dsl_pool_hold+0x5a/0x80 [zfs]
[ 846.907568] dmu_objset_hold+0x33/0xa0 [zfs]
[ 846.907594] zfs_ioc_objset_stats+0x32/0xa0 [zfs]
[ 846.907618] zfsdev_ioctl+0x1e0/0x610 [zfs]
[ 846.907622] do_vfs_ioctl+0xa8/0x630
[ 846.907624] ? handle_mm_fault+0xb1/0x1f0
[ 846.907625] ? __do_page_fault+0x270/0x4d0
[ 846.907627] SyS_ioctl+0x79/0x90
[ 846.907628] do_syscall_64+0x73/0x130
[ 846.907630] entry_SYSCALL_64_after_hwframe+0x3d/0xa2
[ 846.907631] RIP: 0033:0x7fc2734075d7
[ 846.907631] RSP: 002b:00007fff653a4b08 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
[ 846.907633] RAX: ffffffffffffffda RBX: 00007fff653a4b30 RCX: 00007fc2734075d7
[ 846.907633] RDX: 00007fff653a4b30 RSI: 0000000000005a12 RDI: 0000000000000003
[ 846.907634] RBP: 000055f3576e9660 R08: 000000000000ffff R09: 00007fc27345fed0
[ 846.907635] R10: 2f746c7561666564 R11: 0000000000000246 R12: 000055f3576e9660
[ 846.907637] R13: 00007fff653aaec0 R14: 00007fc2749036e0 R15: 00007fff653a8220
Contents of "/proc/spl/kstat/zfs/arcstats"
13 1 0x01 96 4608 11300672527 1808059980062
name type data
hits 4 44186496
misses 4 1247761
demand_data_hits 4 3327097
demand_data_misses 4 17953
demand_metadata_hits 4 39832270
demand_metadata_misses 4 1076950
prefetch_data_hits 4 1357
prefetch_data_misses 4 23
prefetch_metadata_hits 4 1025772
prefetch_metadata_misses 4 152835
mru_hits 4 18193851
mru_ghost_hits 4 0
mfu_hits 4 24976976
mfu_ghost_hits 4 0
deleted 4 10
mutex_miss 4 0
access_skip 4 68
evict_skip 4 1
evict_not_enough 4 0
evict_l2_cached 4 0
evict_l2_eligible 4 101376
evict_l2_ineligible 4 2048
evict_l2_skip 4 0
hash_elements 4 38683
hash_elements_max 4 57741
hash_collisions 4 1520
hash_chains 4 5
hash_chain_max 4 1
p 4 16815604736
c 4 33631209472
c_min 4 2101950592
c_max 4 33631209472
size 4 833199872
compressed_size 4 286609408
uncompressed_size 4 831992320
overhead_size 4 330568192
hdr_size 4 14660144
data_size 4 193579520
metadata_size 4 423598080
dbuf_size 4 46065424
dnode_size 4 112384064
bonus_size 4 42912640
anon_size 4 36502016
anon_evictable_data 4 0
anon_evictable_metadata 4 0
mru_size 4 310932480
mru_evictable_data 4 27623424
mru_evictable_metadata 4 136801792
mru_ghost_size 4 0
mru_ghost_evictable_data 4 0
mru_ghost_evictable_metadata 4 0
mfu_size 4 269743104
mfu_evictable_data 4 53612032
mfu_evictable_metadata 4 3195392
mfu_ghost_size 4 0
mfu_ghost_evictable_data 4 0
mfu_ghost_evictable_metadata 4 0
l2_hits 4 0
l2_misses 4 0
l2_feeds 4 0
l2_rw_clash 4 0
l2_read_bytes 4 0
l2_write_bytes 4 0
l2_writes_sent 4 0
l2_writes_done 4 0
l2_writes_error 4 0
l2_writes_lock_retry 4 0
l2_evict_lock_retry 4 0
l2_evict_reading 4 0
l2_evict_l1cached 4 0
l2_free_on_write 4 0
l2_abort_lowmem 4 0
l2_cksum_bad 4 0
l2_io_error 4 0
l2_size 4 0
l2_asize 4 0
l2_hdr_size 4 0
memory_throttle_count 4 0
memory_direct_count 4 0
memory_indirect_count 4 0
memory_all_bytes 4 67262418944
memory_free_bytes 4 57157578752
memory_available_bytes 3 56106606592
arc_no_grow 4 0
arc_tempreserve 4 0
arc_loaned_bytes 4 0
arc_prune 4 0
arc_meta_used 4 639620352
arc_meta_limit 4 25223407104
arc_dnode_limit 4 2522340710
arc_meta_max 4 965175896
arc_meta_min 4 16777216
sync_wait_for_async 4 168
demand_hit_predictive_prefetch 4 999
arc_need_free 4 0
arc_sys_free 4 1050975296
Command "slabtop -o"
Active / Total Objects (% used) : 28354235 / 29140626 (97.3%)
Active / Total Slabs (% used) : 382017 / 382017 (100.0%)
Active / Total Caches (% used) : 95 / 128 (74.2%)
Active / Total Size (% used) : 4580408.56K / 4743868.00K (96.6%)
Minimum / Average / Maximum Object : 0.01K / 0.16K / 21.81K
OBJS ACTIVE USE OBJ SIZE SLABS OBJ/SLAB CACHE SIZE NAME
17206144 17204917 0% 0.03K 134423 128 537692K kmalloc-32
1141392 966790 0% 0.19K 27176 42 217408K dentry
1114496 1004537 0% 0.06K 17414 64 69656K kmalloc-64
1088192 1078186 0% 0.50K 17003 64 544096K kmalloc-512
1038300 714247 0% 0.13K 17305 60 138440K kernfs_node_cache
937536 931296 0% 0.25K 14649 64 234384K filp
684160 682244 0% 0.06K 10690 64 42760K pid
582099 569877 0% 0.59K 10983 53 351456K inode_cache
520104 518529 0% 0.20K 13336 39 106688K vm_area_struct
404334 388371 0% 0.09K 9627 42 38508K kmalloc-96
342286 341596 0% 0.09K 7441 46 29764K anon_vma
342016 338948 0% 0.25K 5344 64 85504K kmalloc-256
277032 276822 0% 0.19K 6596 42 52768K cred_jar
248352 241634 0% 0.66K 5174 48 165568K proc_inode_cache
248320 233052 0% 0.01K 485 512 1940K kmalloc-8
214984 143177 0% 0.57K 3839 56 122848K radix_tree_node
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