** Description changed: /proc/$pid/maps experienced a significant performance regression for processes with large numbers of threads between Precise and Trusty due to an upstream bug. This behavior is currently blocking my ability to upgrade to Trusty, as we depend on applications with with 10s of thousands of threads. - The issue has been fixed in the usptream -mm tree. + The issue has been fixed in the 4.5 release. Upstream report: http://comments.gmane.org/gmane.linux.kernel.mm/144712 - Upstream patches: - https://git.kernel.org/cgit/linux/kernel/git/mhocko/mm.git/commit/?h=since-4.4&id=2d2a106c79f4b5b2b10e72957f7448e276dbf0a9 - https://git.kernel.org/cgit/linux/kernel/git/mhocko/mm.git/commit/?h=since-4.4&id=eb1899e03405faf7c79396ae9593303d53e2710d + Upstream patches: https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=65376df582174ffcec9e6471bf5b0dd79ba05e4a ProblemType: Bug DistroRelease: Ubuntu 14.04 Package: linux-image-3.13.0-36-generic 3.13.0-36.63 ProcVersionSignature: Ubuntu 3.13.0-36.63-generic 3.13.11.6 Uname: Linux 3.13.0-36-generic x86_64 AlsaDevices: - total 0 - crw-rw---- 1 root audio 116, 1 Feb 18 12:13 seq - crw-rw---- 1 root audio 116, 33 Feb 18 12:13 timer + total 0 + crw-rw---- 1 root audio 116, 1 Feb 18 12:13 seq + crw-rw---- 1 root audio 116, 33 Feb 18 12:13 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: Thu Feb 18 13:44:23 2016 MachineType: Supermicro A1SAi PciMultimedia: - + ProcEnviron: - TERM=screen - PATH=(custom, no user) - XDG_RUNTIME_DIR=<set> - LANG=en_US.UTF-8 - SHELL=/bin/bash + TERM=screen + PATH=(custom, no user) + XDG_RUNTIME_DIR=<set> + LANG=en_US.UTF-8 + SHELL=/bin/bash ProcFB: 0 astdrmfb ProcKernelCmdLine: root=/dev/md1 ro console=tty0 console=ttyS0,57600 RelatedPackageVersions: - linux-restricted-modules-3.13.0-36-generic N/A - linux-backports-modules-3.13.0-36-generic N/A - linux-firmware 1.127.20 + linux-restricted-modules-3.13.0-36-generic N/A + linux-backports-modules-3.13.0-36-generic N/A + linux-firmware 1.127.20 RfKill: Error: [Errno 2] No such file or directory: 'rfkill' SourcePackage: linux UpgradeStatus: Upgraded to trusty on 2014-07-18 (579 days ago) WifiSyslog: - + dmi.bios.date: 02/27/2014 dmi.bios.vendor: American Megatrends Inc. dmi.bios.version: 1.0c dmi.board.asset.tag: To be filled by O.E.M. dmi.board.name: A1SAi dmi.board.vendor: Supermicro dmi.board.version: 123456789 dmi.chassis.asset.tag: To Be Filled By O.E.M. dmi.chassis.type: 18 dmi.chassis.vendor: To Be Filled By O.E.M. dmi.chassis.version: To Be Filled By O.E.M. dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvr1.0c:bd02/27/2014:svnSupermicro:pnA1SAi:pvr123456789:rvnSupermicro:rnA1SAi:rvr123456789:cvnToBeFilledByO.E.M.:ct18:cvrToBeFilledByO.E.M.: dmi.product.name: A1SAi dmi.product.version: 123456789 dmi.sys.vendor: Supermicro
-- 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/1547231 Title: /proc/$pid/maps performance regression Status in linux package in Ubuntu: Fix Released Status in linux source package in Trusty: Triaged Status in linux source package in Vivid: Fix Released Status in linux source package in Wily: Fix Released Status in linux source package in Xenial: Fix Released Bug description: /proc/$pid/maps experienced a significant performance regression for processes with large numbers of threads between Precise and Trusty due to an upstream bug. This behavior is currently blocking my ability to upgrade to Trusty, as we depend on applications with with 10s of thousands of threads. The issue has been fixed in the 4.5 release. Upstream report: http://comments.gmane.org/gmane.linux.kernel.mm/144712 Upstream patches: https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=65376df582174ffcec9e6471bf5b0dd79ba05e4a ProblemType: Bug DistroRelease: Ubuntu 14.04 Package: linux-image-3.13.0-36-generic 3.13.0-36.63 ProcVersionSignature: Ubuntu 3.13.0-36.63-generic 3.13.11.6 Uname: Linux 3.13.0-36-generic x86_64 AlsaDevices: total 0 crw-rw---- 1 root audio 116, 1 Feb 18 12:13 seq crw-rw---- 1 root audio 116, 33 Feb 18 12:13 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: Thu Feb 18 13:44:23 2016 MachineType: Supermicro A1SAi PciMultimedia: ProcEnviron: TERM=screen PATH=(custom, no user) XDG_RUNTIME_DIR=<set> LANG=en_US.UTF-8 SHELL=/bin/bash ProcFB: 0 astdrmfb ProcKernelCmdLine: root=/dev/md1 ro console=tty0 console=ttyS0,57600 RelatedPackageVersions: linux-restricted-modules-3.13.0-36-generic N/A linux-backports-modules-3.13.0-36-generic N/A linux-firmware 1.127.20 RfKill: Error: [Errno 2] No such file or directory: 'rfkill' SourcePackage: linux UpgradeStatus: Upgraded to trusty on 2014-07-18 (579 days ago) WifiSyslog: dmi.bios.date: 02/27/2014 dmi.bios.vendor: American Megatrends Inc. dmi.bios.version: 1.0c dmi.board.asset.tag: To be filled by O.E.M. dmi.board.name: A1SAi dmi.board.vendor: Supermicro dmi.board.version: 123456789 dmi.chassis.asset.tag: To Be Filled By O.E.M. dmi.chassis.type: 18 dmi.chassis.vendor: To Be Filled By O.E.M. dmi.chassis.version: To Be Filled By O.E.M. dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvr1.0c:bd02/27/2014:svnSupermicro:pnA1SAi:pvr123456789:rvnSupermicro:rnA1SAi:rvr123456789:cvnToBeFilledByO.E.M.:ct18:cvrToBeFilledByO.E.M.: dmi.product.name: A1SAi dmi.product.version: 123456789 dmi.sys.vendor: Supermicro To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1547231/+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
