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** Changed in: linux (Ubuntu)
Status: New => Confirmed
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https://bugs.launchpad.net/bugs/1602282
Title:
On __pollwait function issue.
Status in linux package in Ubuntu:
Confirmed
Bug description:
Below is result of perf report:
...............................
│ mov %r13,%rdi
▒
│ mov 0x8(%rdx),%rax
▒
│ add $0x10,%rsi
▒
│ movl $0x0,(%rsi)
▒
38,10 │ movq $0xffffffff81221860,0x10(%rsi)
▒
│ mov %rdx,0x8(%rsi)
▒
│ mov %rax,-0x8(%rsi)
▒
│ callq 0xffffffff810c3490
▒
│7e:┌─→add $0x8,%rsp
▒
4,76 │ │ pop %rbx
▒
│ │ pop %r12
▒
│ │ pop %r13
▒
│ │ pop %rbp
▒
│ │← retq
▒
│89:│ xor %esi,%esi
▒
│ │ mov $0x24000c0,%edi
▒
│ │ mov %rdx,-0x20(%rbp)
▒
│ │ callq 0xffffffff81192200
▒
│ │ test %rax,%rax
▒
│ │ mov -0x20(%rbp),%rdx
▒
│ │↓ je d2
▒
│ │ lea 0x10(%rax),%rcx
▒
│ │ mov %rbx,(%rax)
▒
4,76 │ │ mov %rax,%rbx
▒
│ │ mov %rcx,0x8(%rax)
▒
│ │ mov %rax,0x10(%rdx)
▒
│ │ mov 0x8(%rax),%rsi
▒
9,52 │ │ lea 0x40(%rsi),%rcx
▒
│ │↑ jmp 42
▒
14,29 │be:│ lea 0x1(%rax),%ecx
▒
│ │ shl $0x6,%rax
▒
│ │ lea 0x30(%rdx,%rax,1),%rsi
▒
4,76 │ │ mov %ecx,0x28(%rdx)
▒
│ │↑ jmpq 46
..................................
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 3005 F.... pulseaudio
CurrentDesktop: MATE
Date: Tue Jul 12 17:04:30 2016
InstallationDate: Installed on 2016-04-29 (74 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 1.157.2
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.
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