Please install and boot kernel [1] which enables IRQ debugfs.
Then you can find the "do_IRQ: X.Y" means. On my system:
# ls /sys/kernel/debug/irq/irqs
0 1 10 11 12 120 121 122 123 124 125 126 127 128 129 13 130
131 132 133 14 15 16 17 18 19 2 3 4 5 51 6 67 7 8 9
# cat /sys/kernel/debug/irq/irqs/129
handler: handle_edge_irq
device: 0000:01:00.0
status: 0x00004000
istate: 0x00000000
ddepth: 0
wdepth: 0
dstate: 0x01409200
IRQD_ACTIVATED
IRQD_IRQ_STARTED
IRQD_SINGLE_TARGET
IRQD_MOVE_PCNTXT
IRQD_AFFINITY_SET
node: -1
affinity: 4
effectiv: 4
pending:
domain: INTEL-IR-MSI-1-3
hwirq: 0x80000
chip: IR-PCI-MSI
flags: 0x30
IRQCHIP_SKIP_SET_WAKE
IRQCHIP_ONESHOT_SAFE
parent:
domain: INTEL-IR-1
hwirq: 0x1c0000
chip: INTEL-IR
flags: 0x0
parent:
domain: VECTOR
hwirq: 0x81
chip: APIC
flags: 0x0
Vector: 34
Target: 4
move_in_progress: 0
is_managed: 0
can_reserve: 0
has_reserved: 0
cleanup_pending: 0
Target and Vector are the values in "do_IRQ: Target.Vector".
The affected device can be found by finding the matched Target and
Vector.
[1] https://people.canonical.com/~khfeng/lp1781016-irq-debug/
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https://bugs.launchpad.net/bugs/1781016
Title:
Slow flood of do_IRQ: No irq for vector
Status in linux package in Ubuntu:
Incomplete
Bug description:
Every few seconds I get something like this in my dmesg:
[44984.933221] do_IRQ: 1.34 No irq handler for vector
[44986.933976] do_IRQ: 1.34 No irq handler for vector
[44991.935614] do_IRQ: 1.34 No irq handler for vector
[45004.938590] do_IRQ: 1.34 No irq handler for vector
[45005.939002] do_IRQ: 4.34 No irq handler for vector
[45034.949161] do_IRQ: 4.34 No irq handler for vector
[45051.954569] do_IRQ: 4.34 No irq handler for vector
[45058.956019] do_IRQ: 4.34 No irq handler for vector
[45062.957727] do_IRQ: 4.34 No irq handler for vector
[45063.958204] do_IRQ: 4.34 No irq handler for vector
[45073.961103] do_IRQ: 4.34 No irq handler for vector
The numbers vary. Some examples are 4.34, 4.36, 1.34, 0.33, 6.34,
7.33, 5.37. Eventually dmesg's ring buffer is full and my entire log
is just messages like above with varying #.## numbers.
I researched it and tried disabling irqbalance. It had no effect, the
messages continued.
The system is a Ryzen 2700X with B350 chipset on Asus Prime B350-PLUS.
I have 64GB of Kingston DDR4-2400 ECC memory and Samsung 960 PRO M.2
NVMe SSD, and an Intel I350-T4 quad port gigabit NIC. This issue never
occurred before installing 18.03 on the same hardware. No overclocking
whatsoever has ever been done to this machine.
Also, I had to disable selective suspend on USB in this version to
prevent major USB issues, which was not required in 17.10, that might
be related.
My system seems stable, but spurious IRQs can't be good. I'd like to
resolve this if possible.
ProblemType: Bug
DistroRelease: Ubuntu 18.04
Package: linux-image-4.15.0-26-generic 4.15.0-26.28
ProcVersionSignature: Ubuntu 4.15.0-26.28-generic 4.15.18
Uname: Linux 4.15.0-26-generic x86_64
NonfreeKernelModules: nvidia_modeset nvidia
ApportVersion: 2.20.9-0ubuntu7.2
Architecture: amd64
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/controlC0: gdm 2145 F.... pulseaudio
doug 3736 F.... pulseaudio
/dev/snd/controlC1: gdm 2145 F.... pulseaudio
doug 3736 F.... pulseaudio
Date: Tue Jul 10 12:49:00 2018
HibernationDevice:
InstallationDate: Installed on 2017-06-26 (379 days ago)
InstallationMedia: Ubuntu 16.04 LTS "Xenial Xerus" - Release amd64
(20160420.1)
MachineType: System manufacturer System Product Name
ProcEnviron:
LANGUAGE=en_CA:en
TERM=xterm-256color
PATH=(custom, no user)
LANG=en_CA.UTF-8
SHELL=/bin/bash
ProcFB:
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.15.0-26-generic
root=UUID=53446747-0814-48f7-b7c4-7fd7d7234d83 ro video=vesa:off vga=normal
video=efifb:off usbcore.autosuspend=-1 usbhid.quirks=0x1e71:0x170e:0x4
PulseList:
Error: command ['pacmd', 'list'] failed with exit code 1: Home directory not
accessible: Permission denied
No PulseAudio daemon running, or not running as session daemon.
RelatedPackageVersions:
linux-restricted-modules-4.15.0-26-generic N/A
linux-backports-modules-4.15.0-26-generic N/A
linux-firmware 1.173.1
RfKill:
SourcePackage: linux
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 04/19/2018
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: 4011
dmi.board.asset.tag: Default string
dmi.board.name: PRIME B350-PLUS
dmi.board.vendor: ASUSTeK COMPUTER INC.
dmi.board.version: Rev X.0x
dmi.chassis.asset.tag: Default string
dmi.chassis.type: 3
dmi.chassis.vendor: Default string
dmi.chassis.version: Default string
dmi.modalias:
dmi:bvnAmericanMegatrendsInc.:bvr4011:bd04/19/2018:svnSystemmanufacturer:pnSystemProductName:pvrSystemVersion:rvnASUSTeKCOMPUTERINC.:rnPRIMEB350-PLUS:rvrRevX.0x:cvnDefaultstring:ct3:cvrDefaultstring:
dmi.product.family: To be filled by O.E.M.
dmi.product.name: System Product Name
dmi.product.version: System Version
dmi.sys.vendor: System manufacturer
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