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Message #51648
[Bug 1088433] Re: PERCPU: allocation failed when loading module kvm
** Description changed:
+ SRU Justification:
+ Impact: When using VMs with many CPUs on kvm, the module is loaded per CPU which can cause allocation failures.
+
+ Fix: 8d8022e8aba85192e937f1f0f7450e256d66ae5c solves the issue which is
+ present in 3.8 series and beyond.
+
+ Testcase: Boot a VM with many CPUs, reboot and check if issue occurs.
+
+ --
+
The kernel tries to load the KVM module for each CPU even though it
really only needs to be loaded once. For each subsequent load, the
kernel is trying to allocate the per-cpu area before it checks if the
module is loaded already. This can result in the following backtrace:
[ 8.294573] PERCPU: allocation failed, size=304 align=32, alloc from reserved chunk failed
[ 8.294578] Pid: 1490, comm: modprobe Not tainted 3.5.0-20-generic #31-Ubuntu
[ 8.294579] Call Trace:
[ 8.294597] [<ffffffff81143924>] pcpu_alloc+0x974/0x9d0
[ 8.294604] [<ffffffff810b185a>] ? each_symbol_section+0x2a/0x70
[ 8.294607] [<ffffffff810b18d1>] ? find_symbol+0x31/0x70
[ 8.294610] [<ffffffff81143c43>] __alloc_reserved_percpu+0x13/0x20
[ 8.294613] [<ffffffff810b413a>] layout_and_allocate+0x2fa/0xaf0
[ 8.294615] [<ffffffff810b4a29>] load_module+0xf9/0x1170
[ 8.294630] [<ffffffff810b5af2>] sys_init_module+0x52/0x230
[ 8.294640] [<ffffffff8168b969>] system_call_fastpath+0x16/0x1b
[ 8.294642] kvm: Could not allocate 304 bytes percpu data
Reproduced with kernel from quantal-release and quantal-proposed
I found this reference on LKML:
https://lkml.org/lkml/2012/10/11/198
The following patch solves the issue:
8d8022e8aba85192e937f1f0f7450e256d66ae5c
This is in 3.8/3.11
https://lkml.org/lkml/2013/7/11/545
-
ProblemType: Bug
DistroRelease: Ubuntu 12.10
Package: linux-image-3.5.0-20-generic 3.5.0-20.31
ProcVersionSignature: Ubuntu 3.5.0-20.31-generic 3.5.7.1
Uname: Linux 3.5.0-20-generic x86_64
AlsaDevices:
total 0
crw-rw---T 1 root audio 116, 1 Dec 10 10:54 seq
crw-rw---T 1 root audio 116, 33 Dec 10 10:54 timer
AplayDevices: Error: [Errno 2] No such file or directory: 'aplay'
ApportVersion: 2.6.1-0ubuntu6
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: Error: [Errno 2] No such file or directory: 'iw'
Date: Mon Dec 10 11:03:33 2012
HibernationDevice: RESUME=UUID=c595dd75-dab5-4fcd-a089-302addcaef96
IwConfig: Error: [Errno 2] No such file or directory: 'iwconfig'
MachineType: Intel Corporation LH Pass
MarkForUpload: True
PciMultimedia:
ProcEnviron:
LANGUAGE=en_US:
TERM=screen-bce
PATH=(custom, no user)
LANG=en_US.UTF-8
SHELL=/bin/bash
ProcFB: 0 VESA VGA
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.5.0-20-generic root=UUID=58f9a800-2e0c-4da5-9d94-c4bb4bed4fa2 ro quiet
RelatedPackageVersions:
linux-restricted-modules-3.5.0-20-generic N/A
linux-backports-modules-3.5.0-20-generic N/A
linux-firmware 1.95
RfKill: Error: [Errno 2] No such file or directory: 'rfkill'
SourcePackage: linux
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 04/30/2012
dmi.bios.vendor: Intel Corp.
dmi.bios.version: SE5C600.86B.99.99.2050.043020121425
dmi.board.asset.tag: ....................
dmi.board.name: S4600LH....
dmi.board.vendor: Intel Corporation
dmi.board.version: ..........
dmi.chassis.asset.tag: ....................
dmi.chassis.type: 23
dmi.chassis.vendor: ...............................
dmi.chassis.version: ..................
dmi.modalias: dmi:bvnIntelCorp.:bvrSE5C600.86B.99.99.2050.043020121425:bd04/30/2012:svnIntelCorporation:pnLHPass:pvr....................:rvnIntelCorporation:rnS4600LH....:rvr..........:cvn...............................:ct23:cvr..................:
dmi.product.name: LH Pass
dmi.product.version: ....................
dmi.sys.vendor: Intel Corporation
--
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/1088433
Title:
PERCPU: allocation failed when loading module kvm
Status in “linux” package in Ubuntu:
Fix Released
Status in “linux” source package in Quantal:
In Progress
Status in “linux” source package in Raring:
Fix Released
Bug description:
SRU Justification:
Impact: When using VMs with many CPUs on kvm, the module is loaded per CPU which can cause allocation failures.
Fix: 8d8022e8aba85192e937f1f0f7450e256d66ae5c solves the issue which
is present in 3.8 series and beyond.
Testcase: Boot a VM with many CPUs, reboot and check if issue occurs.
--
The kernel tries to load the KVM module for each CPU even though it
really only needs to be loaded once. For each subsequent load, the
kernel is trying to allocate the per-cpu area before it checks if the
module is loaded already. This can result in the following backtrace:
[ 8.294573] PERCPU: allocation failed, size=304 align=32, alloc from reserved chunk failed
[ 8.294578] Pid: 1490, comm: modprobe Not tainted 3.5.0-20-generic #31-Ubuntu
[ 8.294579] Call Trace:
[ 8.294597] [<ffffffff81143924>] pcpu_alloc+0x974/0x9d0
[ 8.294604] [<ffffffff810b185a>] ? each_symbol_section+0x2a/0x70
[ 8.294607] [<ffffffff810b18d1>] ? find_symbol+0x31/0x70
[ 8.294610] [<ffffffff81143c43>] __alloc_reserved_percpu+0x13/0x20
[ 8.294613] [<ffffffff810b413a>] layout_and_allocate+0x2fa/0xaf0
[ 8.294615] [<ffffffff810b4a29>] load_module+0xf9/0x1170
[ 8.294630] [<ffffffff810b5af2>] sys_init_module+0x52/0x230
[ 8.294640] [<ffffffff8168b969>] system_call_fastpath+0x16/0x1b
[ 8.294642] kvm: Could not allocate 304 bytes percpu data
Reproduced with kernel from quantal-release and quantal-proposed
I found this reference on LKML:
https://lkml.org/lkml/2012/10/11/198
The following patch solves the issue:
8d8022e8aba85192e937f1f0f7450e256d66ae5c
This is in 3.8/3.11
https://lkml.org/lkml/2013/7/11/545
-
ProblemType: Bug
DistroRelease: Ubuntu 12.10
Package: linux-image-3.5.0-20-generic 3.5.0-20.31
ProcVersionSignature: Ubuntu 3.5.0-20.31-generic 3.5.7.1
Uname: Linux 3.5.0-20-generic x86_64
AlsaDevices:
total 0
crw-rw---T 1 root audio 116, 1 Dec 10 10:54 seq
crw-rw---T 1 root audio 116, 33 Dec 10 10:54 timer
AplayDevices: Error: [Errno 2] No such file or directory: 'aplay'
ApportVersion: 2.6.1-0ubuntu6
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: Error: [Errno 2] No such file or directory: 'iw'
Date: Mon Dec 10 11:03:33 2012
HibernationDevice: RESUME=UUID=c595dd75-dab5-4fcd-a089-302addcaef96
IwConfig: Error: [Errno 2] No such file or directory: 'iwconfig'
MachineType: Intel Corporation LH Pass
MarkForUpload: True
PciMultimedia:
ProcEnviron:
LANGUAGE=en_US:
TERM=screen-bce
PATH=(custom, no user)
LANG=en_US.UTF-8
SHELL=/bin/bash
ProcFB: 0 VESA VGA
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.5.0-20-generic root=UUID=58f9a800-2e0c-4da5-9d94-c4bb4bed4fa2 ro quiet
RelatedPackageVersions:
linux-restricted-modules-3.5.0-20-generic N/A
linux-backports-modules-3.5.0-20-generic N/A
linux-firmware 1.95
RfKill: Error: [Errno 2] No such file or directory: 'rfkill'
SourcePackage: linux
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 04/30/2012
dmi.bios.vendor: Intel Corp.
dmi.bios.version: SE5C600.86B.99.99.2050.043020121425
dmi.board.asset.tag: ....................
dmi.board.name: S4600LH....
dmi.board.vendor: Intel Corporation
dmi.board.version: ..........
dmi.chassis.asset.tag: ....................
dmi.chassis.type: 23
dmi.chassis.vendor: ...............................
dmi.chassis.version: ..................
dmi.modalias: dmi:bvnIntelCorp.:bvrSE5C600.86B.99.99.2050.043020121425:bd04/30/2012:svnIntelCorporation:pnLHPass:pvr....................:rvnIntelCorporation:rnS4600LH....:rvr..........:cvn...............................:ct23:cvr..................:
dmi.product.name: LH Pass
dmi.product.version: ....................
dmi.sys.vendor: Intel Corporation
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