[Kernel-packages] [Bug 1579106] Re: Using bcache for / leads to hung processes
Did this issue start happening after an update/upgrade? Was there a prior kernel version where you were not having this particular problem? Would it be possible for you to test the latest upstream kernel? Refer to https://wiki.ubuntu.com/KernelMainlineBuilds . Please test the latest v4.6 kernel[0]. If this bug is fixed in the mainline kernel, please add the following tag 'kernel-fixed-upstream'. If the mainline kernel does not fix this bug, please add the tag: 'kernel-bug-exists-upstream'. Once testing of the upstream kernel is complete, please mark this bug as "Confirmed". Thanks in advance. [0] http://kernel.ubuntu.com/~kernel-ppa/mainline/v4.6-rc6-wily/ ** Tags added: kernel-da-key ** Changed in: linux (Ubuntu) Importance: Undecided => Medium ** Changed in: linux (Ubuntu) Status: Confirmed => Incomplete -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1579106 Title: Using bcache for / leads to hung processes Status in linux package in Ubuntu: Incomplete Bug description: I've used maas 1.9.1 to setup a bcache partition mount as /. The bcache is made of a 400GB SSD backed by sda-part2. The sda drive is a 1TB disk with 1GB carved out for /boot (sda-part1) and the rest given to sda-part2. I believe the bcache mode is set to write-through. Within an hour of this machine being deployed (it's being used as a node in a landscape autopilot openstack deployment) it starts showing hung processes. The output of 'ps faxw' (attached as 'amco-process- list.txt) shows lots of process in the 'D' state and launching more processes that write to the disk will likely get stuck (for example the 'apt-get install python-jenkins' process). This is reproducible. ProblemType: Bug DistroRelease: Ubuntu 14.04 Package: linux-image-3.13.0-85-generic 3.13.0-85.129 ProcVersionSignature: User Name 3.13.0-85.129-generic 3.13.11-ckt36 Uname: Linux 3.13.0-85-generic x86_64 AlsaDevices: total 0 crw-rw 1 root audio 116, 1 May 6 03:07 seq crw-rw 1 root audio 116, 33 May 6 03:07 timer AplayDevices: Error: [Errno 2] No such file or directory: 'aplay' ApportVersion: 2.14.1-0ubuntu3.19 Architecture: amd64 ArecordDevices: Error: [Errno 2] No such file or directory: 'arecord' AudioDevicesInUse: Error: command ['fuser', '-v', '/dev/snd/seq', '/dev/snd/timer'] failed with exit code 1: Date: Fri May 6 14:24:20 2016 IwConfig: Error: [Errno 2] No such file or directory: 'iwconfig' MachineType: HP ProLiant DL360e Gen8 PciMultimedia: ProcEnviron: TERM=screen PATH=(custom, no user) XDG_RUNTIME_DIR= LANG=en_US.UTF-8 SHELL=/bin/bash ProcFB: ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-3.13.0-85-generic root=UUID=cd48c2ff-f38e-4892-a5e2-8862e4412c29 ro console=ttyS0 RelatedPackageVersions: linux-restricted-modules-3.13.0-85-generic N/A linux-backports-modules-3.13.0-85-generic N/A linux-firmware 1.127.22 RfKill: Error: [Errno 2] No such file or directory: 'rfkill' SourcePackage: linux UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 08/02/2014 dmi.bios.vendor: HP dmi.bios.version: P73 dmi.chassis.type: 23 dmi.chassis.vendor: HP dmi.modalias: dmi:bvnHP:bvrP73:bd08/02/2014:svnHP:pnProLiantDL360eGen8:pvr:cvnHP:ct23:cvr: dmi.product.name: ProLiant DL360e Gen8 dmi.sys.vendor: HP To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1579106/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
[Kernel-packages] [Bug 1579106] Re: Using bcache for / leads to hung processes
[Expired for linux (Ubuntu) because there has been no activity for 60 days.] ** Changed in: linux (Ubuntu) Status: Incomplete => Expired -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1579106 Title: Using bcache for / leads to hung processes Status in linux package in Ubuntu: Expired Bug description: I've used maas 1.9.1 to setup a bcache partition mount as /. The bcache is made of a 400GB SSD backed by sda-part2. The sda drive is a 1TB disk with 1GB carved out for /boot (sda-part1) and the rest given to sda-part2. I believe the bcache mode is set to write-through. Within an hour of this machine being deployed (it's being used as a node in a landscape autopilot openstack deployment) it starts showing hung processes. The output of 'ps faxw' (attached as 'amco-process- list.txt) shows lots of process in the 'D' state and launching more processes that write to the disk will likely get stuck (for example the 'apt-get install python-jenkins' process). This is reproducible. ProblemType: Bug DistroRelease: Ubuntu 14.04 Package: linux-image-3.13.0-85-generic 3.13.0-85.129 ProcVersionSignature: User Name 3.13.0-85.129-generic 3.13.11-ckt36 Uname: Linux 3.13.0-85-generic x86_64 AlsaDevices: total 0 crw-rw 1 root audio 116, 1 May 6 03:07 seq crw-rw 1 root audio 116, 33 May 6 03:07 timer AplayDevices: Error: [Errno 2] No such file or directory: 'aplay' ApportVersion: 2.14.1-0ubuntu3.19 Architecture: amd64 ArecordDevices: Error: [Errno 2] No such file or directory: 'arecord' AudioDevicesInUse: Error: command ['fuser', '-v', '/dev/snd/seq', '/dev/snd/timer'] failed with exit code 1: Date: Fri May 6 14:24:20 2016 IwConfig: Error: [Errno 2] No such file or directory: 'iwconfig' MachineType: HP ProLiant DL360e Gen8 PciMultimedia: ProcEnviron: TERM=screen PATH=(custom, no user) XDG_RUNTIME_DIR= LANG=en_US.UTF-8 SHELL=/bin/bash ProcFB: ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-3.13.0-85-generic root=UUID=cd48c2ff-f38e-4892-a5e2-8862e4412c29 ro console=ttyS0 RelatedPackageVersions: linux-restricted-modules-3.13.0-85-generic N/A linux-backports-modules-3.13.0-85-generic N/A linux-firmware 1.127.22 RfKill: Error: [Errno 2] No such file or directory: 'rfkill' SourcePackage: linux UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 08/02/2014 dmi.bios.vendor: HP dmi.bios.version: P73 dmi.chassis.type: 23 dmi.chassis.vendor: HP dmi.modalias: dmi:bvnHP:bvrP73:bd08/02/2014:svnHP:pnProLiantDL360eGen8:pvr:cvnHP:ct23:cvr: dmi.product.name: ProLiant DL360e Gen8 dmi.sys.vendor: HP To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1579106/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
[Kernel-packages] [Bug 1579106] Re: Using bcache for / leads to hung processes
This problem does go away when using the wily, hwe-w, kernel. I'm unable to test the mainline kernel as requested in the above comment at this time. I will try to come back to it when I have the hw configuration available again. -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1579106 Title: Using bcache for / leads to hung processes Status in linux package in Ubuntu: Incomplete Bug description: I've used maas 1.9.1 to setup a bcache partition mount as /. The bcache is made of a 400GB SSD backed by sda-part2. The sda drive is a 1TB disk with 1GB carved out for /boot (sda-part1) and the rest given to sda-part2. I believe the bcache mode is set to write-through. Within an hour of this machine being deployed (it's being used as a node in a landscape autopilot openstack deployment) it starts showing hung processes. The output of 'ps faxw' (attached as 'amco-process- list.txt) shows lots of process in the 'D' state and launching more processes that write to the disk will likely get stuck (for example the 'apt-get install python-jenkins' process). This is reproducible. ProblemType: Bug DistroRelease: Ubuntu 14.04 Package: linux-image-3.13.0-85-generic 3.13.0-85.129 ProcVersionSignature: User Name 3.13.0-85.129-generic 3.13.11-ckt36 Uname: Linux 3.13.0-85-generic x86_64 AlsaDevices: total 0 crw-rw 1 root audio 116, 1 May 6 03:07 seq crw-rw 1 root audio 116, 33 May 6 03:07 timer AplayDevices: Error: [Errno 2] No such file or directory: 'aplay' ApportVersion: 2.14.1-0ubuntu3.19 Architecture: amd64 ArecordDevices: Error: [Errno 2] No such file or directory: 'arecord' AudioDevicesInUse: Error: command ['fuser', '-v', '/dev/snd/seq', '/dev/snd/timer'] failed with exit code 1: Date: Fri May 6 14:24:20 2016 IwConfig: Error: [Errno 2] No such file or directory: 'iwconfig' MachineType: HP ProLiant DL360e Gen8 PciMultimedia: ProcEnviron: TERM=screen PATH=(custom, no user) XDG_RUNTIME_DIR= LANG=en_US.UTF-8 SHELL=/bin/bash ProcFB: ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-3.13.0-85-generic root=UUID=cd48c2ff-f38e-4892-a5e2-8862e4412c29 ro console=ttyS0 RelatedPackageVersions: linux-restricted-modules-3.13.0-85-generic N/A linux-backports-modules-3.13.0-85-generic N/A linux-firmware 1.127.22 RfKill: Error: [Errno 2] No such file or directory: 'rfkill' SourcePackage: linux UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 08/02/2014 dmi.bios.vendor: HP dmi.bios.version: P73 dmi.chassis.type: 23 dmi.chassis.vendor: HP dmi.modalias: dmi:bvnHP:bvrP73:bd08/02/2014:svnHP:pnProLiantDL360eGen8:pvr:cvnHP:ct23:cvr: dmi.product.name: ProLiant DL360e Gen8 dmi.sys.vendor: HP To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1579106/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp