Also, does the bug go away if you boot back into prior kernel versions?
** Changed in: linux (Ubuntu)
Importance: Undecided => Medium
** Changed in: linux (Ubuntu)
Status: Confirmed => Incomplete
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https://bugs.launchpad.net/bugs/1614887
Title:
Lage samba file transfers block btrfs to hung task
Status in linux package in Ubuntu:
Incomplete
Bug description:
this bug occurs when user transfer big files ~1gb to the samba server
on xenial/wily
on wily this problem was NOT showing with samba 4.2 (i guess) until
samba was also upgraded to 4.3.
the samba runs on a KVM VM
samba version: 4.3.9+dfsg-0ubuntu0.16.04.
[ 30.171211] zram: Added device: zram0
[ 30.356301] zram0: detected capacity change from 0 to 1518252032
[ 30.668855] Adding 1482664k swap on /dev/zram0. Priority:5 extents:1
across:1482664k SSFS
[ 35.608271] [drm:qxl_enc_commit [qxl]] *ERROR* head number too large or
missing monitors config: ffffc90000e30000, 0
[ 45.008364] Non-volatile memory driver v1.3
[65636.820111] INFO: task btrfs-cleaner:631 blocked for more than 120 seconds.
[65636.820128] Not tainted 4.4.0-36-generic #55-Ubuntu
[65636.820129] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables
this message.
[65636.820131] btrfs-cleaner D ffff88005ae93ce8 0 631 2
0x00000000
[65636.820137] ffff88005ae93ce8 ffff8800bbb86400 ffff8801b0dc3e80
ffff8801b0dc2580
[65636.820139] ffff88005ae94000 ffff8801851971f0 ffff880185197000
ffff8801851971f0
[65636.820141] 0000000000000001 ffff88005ae93d00 ffffffff81829ec5
ffff8801b7fc4000
[65636.820143] Call Trace:
[65636.820182] [<ffffffff81829ec5>] schedule+0x35/0x80
[65636.820360] [<ffffffffc0170fd3>] wait_current_trans.isra.21+0xd3/0x120
[btrfs]
[65636.820395] [<ffffffff810c3cb0>] ? wake_atomic_t_function+0x60/0x60
[65636.820409] [<ffffffffc01728f5>] start_transaction+0x2c5/0x4b0 [btrfs]
[65636.820434] [<ffffffffc0172af8>] btrfs_start_transaction+0x18/0x20 [btrfs]
[65636.820452] [<ffffffffc015adcf>] btrfs_drop_snapshot+0x7f/0x830 [btrfs]
[65636.820454] [<ffffffff81829816>] ? __schedule+0x3b6/0xa30
[65636.820467] [<ffffffffc0171b02>]
btrfs_clean_one_deleted_snapshot+0xb2/0x100 [btrfs]
[65636.820480] [<ffffffffc016a3cf>] cleaner_kthread+0xcf/0x220 [btrfs]
[65636.820493] [<ffffffffc016a300>] ? check_leaf+0x360/0x360 [btrfs]
[65636.820497] [<ffffffff810a0808>] kthread+0xd8/0xf0
[65636.820499] [<ffffffff810a0730>] ? kthread_create_on_node+0x1e0/0x1e0
[65636.820505] [<ffffffff8182e34f>] ret_from_fork+0x3f/0x70
[65636.820507] [<ffffffff810a0730>] ? kthread_create_on_node+0x1e0/0x1e0
[65636.820550] INFO: task kworker/u4:1:7760 blocked for more than 120 seconds.
[65636.820551] Not tainted 4.4.0-36-generic #55-Ubuntu
[65636.820558] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables
this message.
[65636.820559] kworker/u4:1 D ffff880008433c48 0 7760 2
0x00000000
[65636.820579] Workqueue: btrfs-endio-write btrfs_endio_write_helper [btrfs]
[65636.820581] ffff880008433c48 0000000000000040 ffff8800b9d98c80
ffff8801b51a9900
[65636.820582] ffff880008434000 ffff8801851941f0 ffff880185194000
ffff8801851941f0
[65636.820584] 0000000000000001 ffff880008433c60 ffffffff81829ec5
ffff8801b7fc4000
[65636.820586] Call Trace:
[65636.820588] [<ffffffff81829ec5>] schedule+0x35/0x80
[65636.820602] [<ffffffffc0170fd3>] wait_current_trans.isra.21+0xd3/0x120
[btrfs]
[65636.820604] [<ffffffff810c3cb0>] ? wake_atomic_t_function+0x60/0x60
[65636.820620] [<ffffffffc01728a5>] start_transaction+0x275/0x4b0 [btrfs]
[65636.820650] [<ffffffffc0172b37>] btrfs_join_transaction+0x17/0x20 [btrfs]
[65636.820667] [<ffffffffc017b2a5>] btrfs_finish_ordered_io+0x435/0x650
[btrfs]
[65636.820692] [<ffffffffc017b785>] finish_ordered_fn+0x15/0x20 [btrfs]
[65636.820718] [<ffffffffc01a3eba>] btrfs_scrubparity_helper+0xca/0x2f0
[btrfs]
[65636.820723] [<ffffffff810abcc7>] ? try_to_wake_up+0x47/0x3b0
[65636.820741] [<ffffffffc01a416e>] btrfs_endio_write_helper+0xe/0x10 [btrfs]
[65636.820753] [<ffffffff8109a2c5>] process_one_work+0x165/0x480
[65636.820755] [<ffffffff8109a62b>] worker_thread+0x4b/0x4c0
[65636.820757] [<ffffffff8109a5e0>] ? process_one_work+0x480/0x480
[65636.820758] [<ffffffff810a0808>] kthread+0xd8/0xf0
[65636.820760] [<ffffffff810a0730>] ? kthread_create_on_node+0x1e0/0x1e0
[65636.820761] [<ffffffff8182e34f>] ret_from_fork+0x3f/0x70
[65636.820763] [<ffffffff810a0730>] ? kthread_create_on_node+0x1e0/0x1e0
[65636.820770] INFO: task kworker/u4:2:7814 blocked for more than 120 seconds.
[65636.820771] Not tainted 4.4.0-36-generic #55-Ubuntu
[65636.820772] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables
this message.
[65636.820773] kworker/u4:2 D ffff880102027c48 0 7814 2
0x00000000
[65636.820848] Workqueue: btrfs-endio-write btrfs_endio_write_helper [btrfs]
[65636.820850] ffff880102027c48 0000000000000040 ffff8801b51ae400
ffff8801b51a8c80
[65636.820852] ffff880102028000 ffff8801851941f0 ffff880185194000
ffff8801851941f0
[65636.820853] 0000000000000001 ffff880102027c60 ffffffff81829ec5
ffff8801b7fc4000
[65636.820855] Call Trace:
[65636.820857] [<ffffffff81829ec5>] schedule+0x35/0x80
[65636.820877] [<ffffffffc0170fd3>] wait_current_trans.isra.21+0xd3/0x120
[btrfs]
[65636.820879] [<ffffffff810c3cb0>] ? wake_atomic_t_function+0x60/0x60
[65636.820893] [<ffffffffc01728a5>] start_transaction+0x275/0x4b0 [btrfs]
[65636.820908] [<ffffffffc0172b37>] btrfs_join_transaction+0x17/0x20 [btrfs]
[65636.820922] [<ffffffffc017b2a5>] btrfs_finish_ordered_io+0x435/0x650
[btrfs]
[65636.820934] [<ffffffff813b9ade>] ? bio_free+0x4e/0x60
[65636.820936] [<ffffffff813b9b13>] ? bio_put+0x23/0x30
[65636.820950] [<ffffffffc017b785>] finish_ordered_fn+0x15/0x20 [btrfs]
[65636.820964] [<ffffffffc01a3eba>] btrfs_scrubparity_helper+0xca/0x2f0
[btrfs]
[65636.820966] [<ffffffff810abcc7>] ? try_to_wake_up+0x47/0x3b0
[65636.820999] [<ffffffffc01a416e>] btrfs_endio_write_helper+0xe/0x10 [btrfs]
[65636.821002] [<ffffffff8109a2c5>] process_one_work+0x165/0x480
[65636.821003] [<ffffffff8109a62b>] worker_thread+0x4b/0x4c0
[65636.821005] [<ffffffff8109a5e0>] ? process_one_work+0x480/0x480
[65636.821007] [<ffffffff8109a5e0>] ? process_one_work+0x480/0x480
[65636.821008] [<ffffffff810a0808>] kthread+0xd8/0xf0
[65636.821010] [<ffffffff810a0730>] ? kthread_create_on_node+0x1e0/0x1e0
[65636.821012] [<ffffffff8182e34f>] ret_from_fork+0x3f/0x70
[65636.821013] [<ffffffff810a0730>] ? kthread_create_on_node+0x1e0/0x1e0
[65636.821016] INFO: task kworker/u4:3:7843 blocked for more than 120 seconds.
[65636.821017] Not tainted 4.4.0-36-generic #55-Ubuntu
[65636.821018] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables
this message.
[65636.821019] kworker/u4:3 D ffff8800082abc48 0 7843 2
0x00000000
[65636.821047] Workqueue: btrfs-endio-write btrfs_endio_write_helper [btrfs]
[65636.821048] ffff8800082abc48 0000000000000040 ffff8801b51ae400
ffff8801b6a06400
[65636.821050] ffff8800082ac000 ffff8801851941f0 ffff880185194000
ffff8801851941f0
[65636.821051] 0000000000000001 ffff8800082abc60 ffffffff81829ec5
ffff8801b7fc4000
[65636.821053] Call Trace:
[65636.821055] [<ffffffff81829ec5>] schedule+0x35/0x80
[65636.821069] [<ffffffffc0170fd3>] wait_current_trans.isra.21+0xd3/0x120
[btrfs]
[65636.821071] [<ffffffff810c3cb0>] ? wake_atomic_t_function+0x60/0x60
[65636.821084] [<ffffffffc01728a5>] start_transaction+0x275/0x4b0 [btrfs]
[65636.821104] [<ffffffffc0172b37>] btrfs_join_transaction+0x17/0x20 [btrfs]
[65636.821118] [<ffffffffc017b2a5>] btrfs_finish_ordered_io+0x435/0x650
[btrfs]
[65636.821131] [<ffffffffc017b785>] finish_ordered_fn+0x15/0x20 [btrfs]
[65636.821145] [<ffffffffc01a3eba>] btrfs_scrubparity_helper+0xca/0x2f0
[btrfs]
[65636.821147] [<ffffffff810abcc7>] ? try_to_wake_up+0x47/0x3b0
[65636.821161] [<ffffffffc01a416e>] btrfs_endio_write_helper+0xe/0x10 [btrfs]
[65636.821163] [<ffffffff8109a2c5>] process_one_work+0x165/0x480
[65636.821165] [<ffffffff8109a62b>] worker_thread+0x4b/0x4c0
[65636.821167] [<ffffffff8109a5e0>] ? process_one_work+0x480/0x480
[65636.821168] [<ffffffff8109a5e0>] ? process_one_work+0x480/0x480
[65636.821170] [<ffffffff810a0808>] kthread+0xd8/0xf0
[65636.821171] [<ffffffff810a0730>] ? kthread_create_on_node+0x1e0/0x1e0
[65636.821173] [<ffffffff8182e34f>] ret_from_fork+0x3f/0x70
[65636.821175] [<ffffffff810a0730>] ? kthread_create_on_node+0x1e0/0x1e0
[65636.821176] INFO: task cupsd:7983 blocked for more than 120 seconds.
[65636.821178] Not tainted 4.4.0-36-generic #55-Ubuntu
[65636.821179] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables
this message.
[65636.821179] cupsd D ffff880005d67d48 0 7983 1
0x00000000
[65636.821195] ffff880005d67d48 0001880000000001 ffff8801b0dc2580
ffff8800bbb86400
[65636.821197] ffff880005d68000 ffff8801851941f0 ffff880185194000
ffff8801851941f0
[65636.821198] 0000000000000001 ffff880005d67d60 ffffffff81829ec5
ffff8801b7fc4000
[65636.821200] Call Trace:
[65636.821202] [<ffffffff81829ec5>] schedule+0x35/0x80
[65636.821221] [<ffffffffc0170fd3>] wait_current_trans.isra.21+0xd3/0x120
[btrfs]
[65636.821223] [<ffffffff810c3cb0>] ? wake_atomic_t_function+0x60/0x60
[65636.821236] [<ffffffffc01728f5>] start_transaction+0x2c5/0x4b0 [btrfs]
[65636.821250] [<ffffffffc0172f78>]
btrfs_start_transaction_fallback_global_rsv+0x28/0xc0 [btrfs]
[65636.821263] [<ffffffffc017bf45>] btrfs_unlink+0x35/0xb0 [btrfs]
[65636.821280] [<ffffffff8121a151>] vfs_unlink+0xf1/0x1a0
[65636.821288] [<ffffffff8138d1eb>] ? apparmor_path_unlink+0x1b/0x20
[65636.821291] [<ffffffff8121d749>] do_unlinkat+0x279/0x2d0
[65636.821293] [<ffffffff8121e206>] SyS_unlink+0x16/0x20
[65636.821295] [<ffffffff8182dfb2>] entry_SYSCALL_64_fastpath+0x16/0x71
[65636.821298] INFO: task kworker/u4:6:8029 blocked for more than 120 seconds.
[65636.821299] Not tainted 4.4.0-36-generic #55-Ubuntu
[65636.821300] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables
this message.
[65636.821301] kworker/u4:6 D ffff8800053bfcc8 0 8029 2
0x00000000
[65636.821323] Workqueue: btrfs-extent-refs btrfs_extent_refs_helper [btrfs]
[65636.821324] ffff8800053bfcc8 ffffffff811908e9 ffff8800bbb86400
ffff8801b51ad780
[65636.821326] ffff8800053c0000 ffff8801851971f0 ffff880185197000
ffff8801851971f0
[65636.821328] 0000000000000001 ffff8800053bfce0 ffffffff81829ec5
ffff8801b7fc4000
[65636.821329] Call Trace:
[65636.821345] [<ffffffff811908e9>] ? mempool_free+0x29/0x80
[65636.821348] [<ffffffff81829ec5>] schedule+0x35/0x80
[65636.821366] [<ffffffffc0170fd3>] wait_current_trans.isra.21+0xd3/0x120
[btrfs]
[65636.821368] [<ffffffff810c3cb0>] ? wake_atomic_t_function+0x60/0x60
[65636.821381] [<ffffffffc01728a5>] start_transaction+0x275/0x4b0 [btrfs]
[65636.821406] [<ffffffffc0172b37>] btrfs_join_transaction+0x17/0x20 [btrfs]
[65636.821418] [<ffffffffc015cc58>] delayed_ref_async_start+0x18/0x90 [btrfs]
[65636.821432] [<ffffffffc01a3eba>] btrfs_scrubparity_helper+0xca/0x2f0
[btrfs]
[65636.821446] [<ffffffffc01a411e>] btrfs_extent_refs_helper+0xe/0x10 [btrfs]
[65636.821454] [<ffffffff8109a2c5>] process_one_work+0x165/0x480
[65636.821456] [<ffffffff8109a62b>] worker_thread+0x4b/0x4c0
[65636.821457] [<ffffffff8109a5e0>] ? process_one_work+0x480/0x480
[65636.821459] [<ffffffff8109a5e0>] ? process_one_work+0x480/0x480
[65636.821460] [<ffffffff810a0808>] kthread+0xd8/0xf0
[65636.821462] [<ffffffff810a0730>] ? kthread_create_on_node+0x1e0/0x1e0
[65636.821464] [<ffffffff8182e34f>] ret_from_fork+0x3f/0x70
[65636.821465] [<ffffffff810a0730>] ? kthread_create_on_node+0x1e0/0x1e0
[78275.687923] cfg80211: World regulatory domain updated:
[78275.687930] cfg80211: DFS Master region: unset
ProblemType: Bug
DistroRelease: Ubuntu 16.04
Package: linux-image-generic-lts-xenial (not installed)
ProcVersionSignature: Ubuntu 4.4.0-36.55-generic 4.4.16
Uname: Linux 4.4.0-36-generic x86_64
ApportVersion: 2.20.1-0ubuntu2.1
Architecture: amd64
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/controlC0: wvk 8774 F.... pulseaudio
CurrentDesktop: MATE
Date: Fri Aug 19 11:16:39 2016
HibernationDevice: RESUME=UUID=a3e458ea-200f-4779-a1e5-874bbca3fd2f
InstallationDate: Installed on 2015-08-24 (360 days ago)
InstallationMedia: Ubuntu-Server 15.04 "Vivid Vervet" - Release amd64
(20150422)
IwConfig:
lo no wireless extensions.
eth0 no wireless extensions.
Lsusb:
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 004 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 003 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 002 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
MachineType: QEMU Standard PC (i440FX + PIIX, 1996)
ProcFB: 0 qxldrmfb
ProcKernelCmdLine: BOOT_IMAGE=/@/boot/vmlinuz-4.4.0-36-generic
root=UUID=f7f34b00-862b-45a7-9cdb-ee1546aac7db ro rootflags=subvol=@
RelatedPackageVersions:
linux-restricted-modules-4.4.0-36-generic N/A
linux-backports-modules-4.4.0-36-generic N/A
linux-firmware 1.157.3
RfKill:
SourcePackage: linux
UpgradeStatus: Upgraded to xenial on 2015-10-23 (300 days ago)
dmi.bios.date: 01/01/2011
dmi.bios.vendor: Bochs
dmi.bios.version: Bochs
dmi.chassis.type: 1
dmi.chassis.vendor: Bochs
dmi.modalias:
dmi:bvnBochs:bvrBochs:bd01/01/2011:svnQEMU:pnStandardPC(i440FX+PIIX,1996):pvrpc-i440fx-utopic:cvnBochs:ct1:cvr:
dmi.product.name: Standard PC (i440FX + PIIX, 1996)
dmi.product.version: pc-i440fx-utopic
dmi.sys.vendor: QEMU
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