Would it be possible for you test test the latest mainline kernel, to see if the memory leak happens there as well? It can be downloaded from:
http://kernel.ubuntu.com/~kernel-ppa/mainline/v4.4-rc4-wily/ -- 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/1499203 Title: memory leak in hv_storvsc (3.13.0-63-generic) Status in linux package in Ubuntu: Confirmed Status in linux source package in Trusty: Confirmed Bug description: Slab and SUnreclaim values in /proc/meminfo keep increasing. On one servers it reached 85% of physical memory after 14 days - but on most other servers it increases more slowly. I checked /proc/slabinfo and almost all allocations were in kmalloc-512. So I enabled "slub_debug=U,kmalloc-512" on one server, and after only 24h of uptime 11% of the memory was used by kmalloc-512 and unreclaimable. With debugging enabled I could see the following in /sys/kernel/slab/kmalloc-512/alloc_calls: 521294 storvsc_queuecommand+0x359/0x790 [hv_storvsc] age=161922/955116/20882927 pid=1-41545 All other counters were below 2000. In /sys/kernel/slab/kmalloc-512/free_calls I see the following: 516823 <not-available> age=4315783846 pid=0 The hv_storvsc module is for Hyper-V. We are (unfortunately) running Hyper-V 6.3.9600.16384 with Microsoft System Center 2012 R2 Update rollup 3 for all the servers with this issue. Kernels are stock linux-image-3.13.0-63-generic, 3.13.0-63.103, x86_64, from Ubuntu 14.04 LTS . /proc/version_signature contains: Ubuntu 3.13.0-63.103-generic 3.13.11-ckt25 No output from lspci -vnvn. The problem described above happens on both single and multicore virtual machines. CPU in hypervisors are E5-2630 v2 @ 2.60GHz. Let me know if you need more info or if I can do more debugging. Regards, Oskar Liljeblad --- AlsaDevices: total 0 crw-rw---- 1 root audio 116, 1 Sep 24 00:31 seq crw-rw---- 1 root audio 116, 33 Sep 24 00:31 timer AplayDevices: Error: [Errno 2] No such file or directory ApportVersion: 2.14.1-0ubuntu3.13 Architecture: amd64 ArecordDevices: Error: [Errno 2] No such file or directory AudioDevicesInUse: Error: command ['fuser', '-v', '/dev/snd/seq', '/dev/snd/timer'] failed with exit code 1: CRDA: Error: [Errno 2] No such file or directory CurrentDmesg: [59081.977909] systemd-udevd[26480]: starting version 204 [59124.051974] init: systemd-logind main process (756) killed by TERM signal DistroRelease: Ubuntu 14.04 InstallationDate: Installed on 2014-09-09 (380 days ago) InstallationMedia: Ubuntu-Server 14.04.1 LTS "Trusty Tahr" - Release amd64 (20140722.3) IwConfig: eth0 no wireless extensions. eth1 no wireless extensions. lo no wireless extensions. Lspci: Lsusb: Error: command ['lsusb'] failed with exit code 1: unable to initialize libusb: -99 MachineType: Microsoft Corporation Virtual Machine Package: linux (not installed) PciMultimedia: ProcFB: 0 hyperv_fb ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.13.0-63-generic.efi.signed root=UUID=f4d228d6-2eee-40fc-bf3f-633e46fa8301 ro slub_debug=U,kmalloc-512 ProcVersionSignature: Ubuntu 3.13.0-63.103-generic 3.13.11-ckt25 RelatedPackageVersions: linux-restricted-modules-3.13.0-63-generic N/A linux-backports-modules-3.13.0-63-generic N/A linux-firmware 1.127.15 RfKill: Error: [Errno 2] No such file or directory Tags: trusty Uname: Linux 3.13.0-63-generic x86_64 UpgradeStatus: No upgrade log present (probably fresh install) UserGroups: WifiSyslog: Sep 24 02:06:19 adm-backup1 dhclient: message repeated 1447 times: [ DHCPREQUEST of 10.40.128.9 on eth0 to 192.0.2.253 port 67 (xid=0x429dad4)] Sep 24 02:06:37 adm-backup1 dhclient: DHCPREQUEST of 10.40.128.9 on eth0 to 255.255.255.255 port 67 (xid=0x429dad4) Sep 24 02:06:37 adm-backup1 dhclient: DHCPACK of 10.40.128.9 from 192.0.2.253 Sep 24 02:06:37 adm-backup1 dhclient: bound to 10.40.128.9 -- renewal in 44877 seconds. _MarkForUpload: True dmi.bios.date: 11/26/2012 dmi.bios.vendor: Microsoft Corporation dmi.bios.version: Hyper-V UEFI Release v1.0 dmi.board.asset.tag: None dmi.board.name: Virtual Machine dmi.board.vendor: Microsoft Corporation dmi.board.version: Hyper-V UEFI Release v1.0 dmi.chassis.asset.tag: 6126-4244-1659-0314-3158-3955-44 dmi.chassis.type: 3 dmi.chassis.vendor: Microsoft Corporation dmi.chassis.version: Hyper-V UEFI Release v1.0 dmi.modalias: dmi:bvnMicrosoftCorporation:bvrHyper-VUEFIReleasev1.0:bd11/26/2012:svnMicrosoftCorporation:pnVirtualMachine:pvrHyper-VUEFIReleasev1.0:rvnMicrosoftCorporation:rnVirtualMachine:rvrHyper-VUEFIReleasev1.0:cvnMicrosoftCorporation:ct3:cvrHyper-VUEFIReleasev1.0: dmi.product.name: Virtual Machine dmi.product.version: Hyper-V UEFI Release v1.0 dmi.sys.vendor: Microsoft Corporation To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1499203/+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
