This bug was fixed in the package linux - 4.8.0-27.29 --------------- linux (4.8.0-27.29) yakkety; urgency=low
[ Seth Forshee ] * Release Tracking Bug - LP: #1635377 * proc_keys_show crash when reading /proc/keys (LP: #1634496) - SAUCE: KEYS: ensure xbuf is large enough to fix buffer overflow in proc_keys_show (LP: #1634496) * Revert "If zone is so small that watermarks are the same, stop zone balance" in yakkety (LP: #1632894) - Revert "UBUNTU: SAUCE: (no-up) If zone is so small that watermarks are the same, stop zone balance." * lts-yakkety 4.8 cannot mount lvm raid1 (LP: #1631298) - SAUCE: (no-up) dm raid: fix compat_features validation * kswapd0 100% CPU usage (LP: #1518457) - SAUCE: (no-up) If zone is so small that watermarks are the same, stop zone balance. * [Trusty->Yakkety] powerpc/64: Fix incorrect return value from __copy_tofrom_user (LP: #1632462) - SAUCE: (no-up) powerpc/64: Fix incorrect return value from __copy_tofrom_user * Ubuntu 16.10: Oops panic in move_page_tables/page_remove_rmap after running memory_stress_ng. (LP: #1628976) - SAUCE: (no-up) powerpc/pseries: Fix stack corruption in htpe code * Paths not failed properly when unmapping virtual FC ports in VIOS (using ibmvfc) (LP: #1632116) - scsi: ibmvfc: Fix I/O hang when port is not mapped * [Ubuntu16.10]KV4.8: kernel livepatch config options are not set (LP: #1626983) - [Config] Enable live patching on powerpc/ppc64el * CONFIG_AUFS_XATTR is not set (LP: #1557776) - [Config] CONFIG_AUFS_XATTR=y * Yakkety update to 4.8.1 stable release (LP: #1632445) - arm64: debug: avoid resetting stepping state machine when TIF_SINGLESTEP - Using BUG_ON() as an assert() is _never_ acceptable - usb: misc: legousbtower: Fix NULL pointer deference - Staging: fbtft: Fix bug in fbtft-core - usb: usbip: vudc: fix left shift overflow - USB: serial: cp210x: Add ID for a Juniper console - Revert "usbtmc: convert to devm_kzalloc" - ALSA: hda - Adding one more ALC255 pin definition for headset problem - ALSA: hda - Fix headset mic detection problem for several Dell laptops - ALSA: hda - Add the top speaker pin config for HP Spectre x360 - Linux 4.8.1 * PSL data cache should be flushed before resetting CAPI adapter (LP: #1632049) - cxl: Flush PSL cache before resetting the adapter * thunder nic: avoid link delays due to RX_PACKET_DIS (LP: #1630038) - net: thunderx: Don't set RX_PACKET_DIS while initializing * crypto/vmx/p8_ghash memory corruption (LP: #1630970) - crypto: ghash-generic - move common definitions to a new header file - crypto: vmx - Fix memory corruption caused by p8_ghash - crypto: vmx - Ensure ghash-generic is enabled * arm64: SPCR console not autodetected (LP: #1630311) - of/serial: move earlycon early_param handling to serial - [Config] CONFIG_ACPI_SPCR_TABLE=y - ACPI: parse SPCR and enable matching console - ARM64: ACPI: enable ACPI_SPCR_TABLE - serial: pl011: add console matching function * include/linux/security.h header syntax error with !CONFIG_SECURITYFS (LP: #1630990) - SAUCE: (no-up) include/linux/security.h -- fix syntax error with CONFIG_SECURITYFS=n * sha1-powerpc returning wrong results (LP: #1629977) - crypto: sha1-powerpc - little-endian support -- Seth Forshee <seth.fors...@canonical.com> Thu, 20 Oct 2016 14:09:37 -0500 ** Changed in: linux (Ubuntu Yakkety) Status: Invalid => Fix Released ** Changed in: linux (Ubuntu Yakkety) Status: Invalid => Fix Released -- 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/1518457 Title: kswapd0 100% CPU usage Status in Linux: Unknown Status in linux package in Ubuntu: Invalid Status in linux source package in Xenial: Fix Released Status in linux source package in Yakkety: Fix Released Bug description: As per bug 721896 and various others: I'm on an AWS t2.micro instance (Xeon E5-2670, 991MiB of memory). Occasionally (about once a day), kswapd0 falls into a busy loop and spins on 100% CPU usage indefinitely. This can be provoked by copying/writing large files (e.g. dding a 256MB file), but it happens occasionally otherwise. System memory usage (not including buffers/caches) currently sits at 36%, which is typical[1]. Initially I had no swap space configured; I've since tried enabling a 256MB swap file, but the problem continues to occur and no swap space is used. The system can be recovered with `echo 1 > /proc/sys/vm/drop_caches`. Happy to provide further information/take further debugging actions. [1] Full output from `free`: total used free shared buffers cached Mem: 1014936 483448 531488 28556 9756 112700 -/+ buffers/cache: 360992 653944 Swap: 262140 0 262140 ProblemType: Bug DistroRelease: Ubuntu 15.10 Package: linux-image-4.2.0-18-generic 4.2.0-18.22 ProcVersionSignature: Ubuntu 4.2.0-18.22-generic 4.2.3 Uname: Linux 4.2.0-18-generic x86_64 AlsaDevices: total 0 crw-rw---- 1 root audio 116, 1 Nov 19 19:40 seq crw-rw---- 1 root audio 116, 33 Nov 19 19:40 timer AplayDevices: Error: [Errno 2] No such file or directory: 'aplay' ApportVersion: 2.19.1-0ubuntu5 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: CRDA: N/A Date: Fri Nov 20 20:44:30 2015 Ec2AMI: ami-1c552a76 Ec2AMIManifest: (unknown) Ec2AvailabilityZone: us-east-1d Ec2InstanceType: t2.micro Ec2Kernel: unavailable Ec2Ramdisk: unavailable IwConfig: Error: [Errno 2] No such file or directory: 'iwconfig' Lsusb: Error: command ['lsusb'] failed with exit code 1: unable to initialize libusb: -99 MachineType: Xen HVM domU PciMultimedia: ProcEnviron: TERM=screen PATH=(custom, no user) LANG=en_US.UTF-8 SHELL=/bin/bash ProcFB: 0 xen ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.2.0-18-generic root=UUID=35bc01f4-4602-4823-976e-508edef899df ro console=tty1 console=ttyS0 net.ifnames=0 RelatedPackageVersions: linux-restricted-modules-4.2.0-18-generic N/A linux-backports-modules-4.2.0-18-generic N/A linux-firmware N/A RfKill: Error: [Errno 2] No such file or directory: 'rfkill' SourcePackage: linux UdevLog: Error: [Errno 2] No such file or directory: '/var/log/udev' UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 05/06/2015 dmi.bios.vendor: Xen dmi.bios.version: 4.2.amazon dmi.chassis.type: 1 dmi.chassis.vendor: Xen dmi.modalias: dmi:bvnXen:bvr4.2.amazon:bd05/06/2015:svnXen:pnHVMdomU:pvr4.2.amazon:cvnXen:ct1:cvr: dmi.product.name: HVM domU dmi.product.version: 4.2.amazon dmi.sys.vendor: Xen To manage notifications about this bug go to: https://bugs.launchpad.net/linux/+bug/1518457/+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