On funct remove_entity_load_avg issue.

On function remove_entity_load_avg from file http://lxr.free-electrons.com/source/kernel/sched/fair.c#L2647

http://lxr.free-electrons.com/source/kernel/sched/fair.c#L3000
my processor spent 100 cycles to move nonexistent data on %rbx.
On this funct exist embbeded function with issue .

Bellow isresult
$perf record -e cycles -ag and thern perf report.

remove_entity_load_avg /proc/kcore
       │ ▒
       │ ▒
       │ ▒
       │ Disassembly of section load0: ▒
       │ ▒
       │ ffffffff810bbcb0 <load0>: ▒
       │ nop ▒
       │ push %rbp ◆
       │ mov %rsp,%rbp ▒
       │ push %r15 ▒
       │ push %r14 ▒
       │ push %r13 ▒
       │ push %r12 ▒
       │ push %rbx ▒
       │ mov %rdi,%rbx ▒
       │ and $0xfffffffffffffff0,%rsp ▒
       │ sub $0x10,%rsp ▒
       │ mov 0x150(%rdi),%r13 ▒
       │ mov 0x60(%r13),%rdx ▒
       │ mov %rdx,%rax ▒
       │ sub 0x160(%rdi),%rax ▒
       │ ↓ js 1f4 ▒
       │ shr $0xa,%rax ▒
       │ test %rax,%rax ▒
       │ ↓ je 120 ▒
       │ mov %rdx,0x160(%rdi) ▒
       │ mov 0x174(%rdi),%edx ▒
       │ mov %rdx,%rcx ▒
       │ add %rax,%rdx ▒
       │ cmp $0x3ff,%rdx ▒
       │ ↓ jbe 14d ▒
       │ mov $0x400,%edx ▒
       │ movl $0x0,0x174(%rdi) ▒
       │ sub %ecx,%edx ▒
       │ sub %rdx,%rax ▒
       │ mov %rax,%rdi ▒
       │ and $0x3ff,%eax ▒
       │ shr $0xa,%rdi ▒
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ProblemType: Bug
DistroRelease: Ubuntu 16.04
Package: linux-image-4.4.0-22-generic 4.4.0-22.40
ProcVersionSignature: Ubuntu 4.4.0-22.40-generic 4.4.8
Uname: Linux 4.4.0-22-generic x86_64
ApportVersion: 2.20.1-0ubuntu2.1
Architecture: amd64
AudioDevicesInUse:
 USER PID ACCESS COMMAND
 /dev/snd/pcmC0D0p: asu 3213 F...m pulseaudio
 /dev/snd/controlC0: asu 3213 F.... pulseaudio
CurrentDesktop: MATE
Date: Sat Jun 11 13:12:03 2016
InstallationDate: Installed on 2016-04-29 (42 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-4.4.0-22-generic root=/dev/mapper/192--168--0--108--vg-root ro
RelatedPackageVersions:
 linux-restricted-modules-4.4.0-22-generic N/A
 linux-backports-modules-4.4.0-22-generic N/A
 linux-firmware 1.157
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.