Public bug reported:
Below is result of perf report:
exit_idle /proc/kcore
│
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│
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│
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│ Disassembly of section load0:
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│
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│ ffffffff81039530 <load0>:
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│ nop
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│ mov %gs:0xd3c0,%rax
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50,00 │ mov 0x428(%rax),%eax
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│ test %eax,%eax
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│ ↓ jne 27
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│ btrl $0x0,%gs:0x7efd3db7(%rip) # 0xd308
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50,00 │ sbb %eax,%eax
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│ test %eax,%eax
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│ ↓ jne 28
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│27: ← retq
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│28: push %rbp
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│ xor %edx,%edx
◆
│ mov $0x2,%esi
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│ mov $0xffffffff820cbd50,%rdi
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│ mov %rsp,%rbp
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│ callq 0xffffffff810a1790
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│ pop %rbp
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│ ← retq
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▒
ProblemType: Bug
DistroRelease: Ubuntu 16.04
Package: linux-image-4.4.0-28-generic 4.4.0-28.47
ProcVersionSignature: Ubuntu 4.4.0-28.47-generic 4.4.13
Uname: Linux 4.4.0-28-generic x86_64
ApportVersion: 2.20.1-0ubuntu2.1
Architecture: amd64
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/controlC0: asu 2989 F.... pulseaudio
CurrentDesktop: MATE
Date: Tue Jul 5 11:39:20 2016
InstallationDate: Installed on 2016-04-29 (66 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=/vmlinuz-4.4.0-28-generic
root=/dev/mapper/192--168--0--108--vg-root ro
RelatedPackageVersions:
linux-restricted-modules-4.4.0-28-generic N/A
linux-backports-modules-4.4.0-28-generic N/A
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.asset.tag: To Be Filled By O.E.M.
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.asset.tag: To Be Filled By O.E.M.
dmi.chassis.type: 3
dmi.chassis.vendor: To Be Filled By O.E.M.
dmi.chassis.version: To Be Filled By O.E.M.
dmi.modalias:
dmi:bvnAmericanMegatrendsInc.:bvrS0101:bd07/08/2008:svnOlidataS.p.A.:pnALABAMA:pvrToBeFilledByO.E.M.:rvnTobefilledbyO.E.M.:rnTobefilledbyO.E.M.:rvrTobefilledbyO.E.M.:cvnToBeFilledByO.E.M.:ct3:cvrToBeFilledByO.E.M.:
dmi.product.name: ALABAMA
dmi.product.version: To Be Filled By O.E.M.
dmi.sys.vendor: Olidata S.p.A.
** Affects: linux (Ubuntu)
Importance: Undecided
Status: New
** Tags: amd64 apport-bug xenial
** Patch added: "Tested on linux-4.6.2"
https://bugs.launchpad.net/bugs/1599076/+attachment/4695700/+files/exit_idle_rebuild.patch
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https://bugs.launchpad.net/bugs/1599076
Title:
On exit_idle function issue
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