BTRFS Kernel trace - Terrible Write Performance
Affects | Status | Importance | Assigned to | Milestone | |
---|---|---|---|---|---|
linux (Ubuntu) |
Triaged
|
Medium
|
Unassigned |
Bug Description
I am seeing this several times in the logs. I also installed a mainline upstream kernel and it still occurred in 4.5-rc7-wily.
theark kernel: INFO: task btrfs-transacti:518 blocked for more than 120 seconds.
Mar 10 14:00:44 theark kernel: Not tainted 4.2.0-27-generic #32-Ubuntu
Mar 10 14:00:44 theark kernel: "echo 0 > /proc/sys/
Mar 10 14:00:44 theark kernel: btrfs-transacti D ffff88041f296640 0 518 2 0x00000000
Mar 10 14:00:44 theark kernel: ffff8803e0eafdb8 0000000000000046 ffff88040cdaa940 ffff88040c8dee00
Mar 10 14:00:44 theark kernel: 0000000000000246 ffff8803e0eb0000 ffff880409d44178 ffff88040997f800
Mar 10 14:00:44 theark kernel: ffff8803e0eafdf8 ffff880409d441d8 ffff8803e0eafdd8 ffffffff817edc37
Mar 10 14:00:44 theark kernel: Call Trace:
Mar 10 14:00:44 theark kernel: [<ffffffff817ed
Mar 10 14:00:44 theark kernel: [<ffffffffc0324
Mar 10 14:00:44 theark kernel: [<ffffffff810bd
Mar 10 14:00:44 theark kernel: [<ffffffffc031f
Mar 10 14:00:44 theark kernel: [<ffffffffc031f
Mar 10 14:00:44 theark kernel: [<ffffffff8109a
Mar 10 14:00:44 theark kernel: [<ffffffff8109a
Mar 10 14:00:44 theark kernel: [<ffffffff817f2
Mar 10 14:00:44 theark kernel: [<ffffffff8109a
ProblemType: Bug
DistroRelease: Ubuntu 15.10
Package: linux-image-
ProcVersionSign
Uname: Linux 4.2.0-27-generic x86_64
ApportVersion: 2.19.1-0ubuntu5
Architecture: amd64
AudioDevicesInUse: Error: command ['fuser', '-v', '/dev/snd/by-path', '/dev/snd/hwC0D3', '/dev/snd/hwC0D2', '/dev/snd/
Date: Thu Mar 10 13:59:12 2016
HibernationDevice: RESUME=
InstallationDate: Installed on 2015-05-10 (305 days ago)
InstallationMedia: Ubuntu-Server 15.04 "Vivid Vervet" - Release amd64 (20150422)
IwConfig:
p1p1 no wireless extensions.
br0 no wireless extensions.
lo no wireless extensions.
MachineType: Gigabyte Technology Co., Ltd. To be filled by O.E.M.
ProcEnviron:
TERM=screen
PATH=(custom, no user)
LANG=en_US.UTF-8
SHELL=/bin/bash
ProcFB: 0 inteldrmfb
ProcKernelCmdLine: BOOT_IMAGE=
PulseList: Error: command ['pacmd', 'list'] failed with exit code 1: No PulseAudio daemon running, or not running as session daemon.
RelatedPackageV
linux-
linux-
linux-firmware 1.156
RfKill:
SourcePackage: linux
UdevLog: Error: [Errno 2] No such file or directory: '/var/log/udev'
UpgradeStatus: Upgraded to wily on 2015-10-26 (136 days ago)
dmi.bios.date: 01/06/2014
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: F18i
dmi.board.
dmi.board.name: Z77X-D3H
dmi.board.vendor: Gigabyte Technology Co., Ltd.
dmi.board.version: x.x
dmi.chassis.
dmi.chassis.type: 3
dmi.chassis.vendor: Gigabyte Technology Co., Ltd.
dmi.chassis.
dmi.modalias: dmi:bvnAmerican
dmi.product.name: To be filled by O.E.M.
dmi.product.
dmi.sys.vendor: Gigabyte Technology Co., Ltd.
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