On finish_task_switch function issue.
Affects | Status | Importance | Assigned to | Milestone | |
---|---|---|---|---|---|
linux (Ubuntu) |
Triaged
|
Medium
|
Unassigned |
Bug Description
below is result of perf report:
finish_task_switch /proc/kcore
│ ▒
│ ▒
│ ▒
│ Disassembly of section load0: ▒
│ ▒
│ ffffffff810a96e0 <load0>: ▒
60,00 │ nop ▒
│ push %rbp ◆
│ mov %rsp,%rbp ▒
│ push %r15 ▒
│ push %r14 ▒
│ push %r13 ▒
│ mov %rdi,%r13 ▒
│ push %r12 ▒
│ mov $0x16d00,%r12 ▒
│ push %rbx ▒
│ add %gs:0x7ef60a84(
│ mov %gs:0x7ef63c44(
│ and $0x7fffffff,%r9d ▒
│ mov 0x8f8(%r12),%r14 ▒
20,00 │ ↓ jne 1be ▒
│ 41: movq $0x0,0x8f8(%r12) ▒
│ mov 0x0(%r13),%r15 ▒
│ mov %gs:0xd3c0,%rbx ▒
│ nop ▒
│ 5f: nop ▒
│ 64: movl $0x0,0x28(%r13) ▒
│ mov %r12,%rdi ▒
│ movb $0x0,(%rdi) ▒
20,00 │ nop ▒
│ sti
.......
ProblemType: Bug
DistroRelease: Ubuntu 16.04
Package: linux-image-
ProcVersionSign
Uname: Linux 4.4.0-28-generic x86_64
ApportVersion: 2.20.1-0ubuntu2.1
Architecture: amd64
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/
CurrentDesktop: XFCE
Date: Wed Jul 6 11:58:50 2016
InstallationDate: Installed on 2016-04-29 (67 days ago)
InstallationMedia: Ubuntu-Studio 16.04 LTS "Xenial Xerus" - Release amd64 (20160420.1)
IwConfig:
lo no wireless extensions.
enp1s0 no wireless extensions.
MachineType: Olidata S.p.A. ALABAMA
ProcFB: 0 inteldrmfb
ProcKernelCmdLine: BOOT_IMAGE=
RelatedPackageV
linux-
linux-
linux-firmware 1.157.1
RfKill:
SourcePackage: linux
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 07/08/2008
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: S0101
dmi.board.
dmi.board.name: To be filled by O.E.M.
dmi.board.vendor: To be filled by O.E.M.
dmi.board.version: To be filled by O.E.M.
dmi.chassis.
dmi.chassis.type: 3
dmi.chassis.vendor: To Be Filled By O.E.M.
dmi.chassis.
dmi.modalias: dmi:bvnAmerican
dmi.product.name: ALABAMA
dmi.product.
dmi.sys.vendor: Olidata S.p.A.
tags: | added: patch |
This change was made by a bot.