Re: ACPI IRQ storm with 6.10

[Jiri Slaby <jirislaby@kernel.org>]

CC e1000e guys + Jesse (due to 75a3f93b5383) + Bjorn (due to b2c289415b2b)

On 17. 08. 24, 19:57, Petr Valenta wrote:
> 
> 
> Dne 16. 08. 24 v 20:29 Rafael J. Wysocki napsal(a):
>> On Wed, Aug 14, 2024 at 8:48 AM Jiri Slaby <jirislaby@kernel.org> wrote:
>>>
>>> On 14. 08. 24, 7:22, Jiri Slaby wrote:
>>>> Hi,
>>>>
>>>> one openSUSE's user reported that with 6.10, he sees one CPU under an
>>>> IRQ storm from ACPI (sci_interrupt):
>>>>      9:   20220768          ...  IR-IO-APIC    9-fasteoi   acpi
>>>>
>>>> At:
>>>> https://bugzilla.suse.com/show_bug.cgi?id=1229085
>>>>
>>>> 6.9 was OK.
>>>>
>>>> With acpi.debug_level=0x08000000 acpi.debug_layer=0xffffffff, there 
>>>> is a
>>>> repeated load of:
>>>>> evgpe-0673 ev_detect_gpe         : Read registers for GPE 6D:
>>>>> Status=20, Enable=00, RunEnable=4A, WakeEnable=00
>>>
>>> 0x6d seems to count excessively (10 snapshots every 1 second):
>>>> /sys/firmware/acpi/interrupts/gpe6D:   82066  EN STS enabled      
>>>> unmasked
>>>> /sys/firmware/acpi/interrupts/gpe6D:   86536  EN STS enabled      
>>>> unmasked
>>>> /sys/firmware/acpi/interrupts/gpe6D:   90990     STS enabled      
>>>> unmasked
>>>> /sys/firmware/acpi/interrupts/gpe6D:   95468  EN STS enabled      
>>>> unmasked
>>>> /sys/firmware/acpi/interrupts/gpe6D:  100282  EN STS enabled      
>>>> unmasked
>>>> /sys/firmware/acpi/interrupts/gpe6D:  105187     STS enabled      
>>>> unmasked
>>>> /sys/firmware/acpi/interrupts/gpe6D:  110014     STS enabled      
>>>> unmasked
>>>> /sys/firmware/acpi/interrupts/gpe6D:  114852     STS enabled      
>>>> unmasked
>>>> /sys/firmware/acpi/interrupts/gpe6D:  119682     STS enabled      
>>>> unmasked
>>>> /sys/firmware/acpi/interrupts/gpe6D:  124194     STS enabled      
>>>> unmasked
>>>> /sys/firmware/acpi/interrupts/gpe6D:  128641  EN STS enabled      
>>>> unmasked
>>>
>>> acpidump:
>>> https://bugzilla.suse.com/attachment.cgi?id=876677
>>>
>>> DSDT:
>>> https://bugzilla.suse.com/attachment.cgi?id=876678
>>>
>>>> Any ideas?
>>
>> GPE 6D is listed in _PRW for some devices, so maybe one of them
>> continues to trigger wakeup events?
>>
> 
> Disabling powertop service (which calls /usr/sbin/powertop --auto-tune) 
> solves problem completely. After some search I have found this is the 
> cause:
> 
> # causes IRQ storm on 6.10.x
> # kernel 6.9.9 is immune
> echo 'auto' > /sys/bus/pci/devices/0000:00:1f.6/power/control

$ git log --no-merges  --oneline v6.9..v6.10 
drivers/net/ethernet/intel/e1000e/
76a0a3f9cc2f e1000e: fix force smbus during suspend flow
c93a6f62cb1b e1000e: Fix S0ix residency on corporate systems
bfd546a552e1 e1000e: move force SMBUS near the end of enable_ulp function
6918107e2540 net: e1000e & ixgbe: Remove PCI_HEADER_TYPE_MFD duplicates
1eb2cded45b3 net: annotate writes on dev->mtu from ndo_change_mtu()
b2c289415b2b e1000e: Remove redundant runtime resume for ethtool_ops
75a3f93b5383 net: intel: implement modern PM ops declarations

The last two play with PM ^^. I cannot immediately see if the issue can 
be caused by any of those, though.

If there are no ideas, possibly giving revert of both a try?

> lspci | grep 1f.6
> 00:1f.6 Ethernet controller: Intel Corporation Device 550b (rev 20)
> 
> journalctl -b | grep 1f.6
> srp 17 19:44:17 e14 kernel: pci 0000:00:1f.6: [8086:550b] type 00 class 
> 0x020000 conventional PCI endpoint
> srp 17 19:44:17 e14 kernel: pci 0000:00:1f.6: BAR 0 [mem 
> 0x9c300000-0x9c31ffff]
> srp 17 19:44:17 e14 kernel: pci 0000:00:1f.6: PME# supported from D0 
> D3hot D3cold
> srp 17 19:44:17 e14 kernel: pci 0000:00:1f.6: Adding to iommu group 12
> srp 17 19:44:19 e14 kernel: e1000e 0000:00:1f.6: Interrupt Throttling 
> Rate (ints/sec) set to dynamic conservative mode
> srp 17 19:44:19 e14 kernel: e1000e 0000:00:1f.6 0000:00:1f.6 
> (uninitialized): registered PHC clock
> srp 17 19:44:20 e14 kernel: e1000e 0000:00:1f.6 eth0: (PCI 
> Express:2.5GT/s:Width x1) fc:5c:ee:b0:13:74
> srp 17 19:44:20 e14 kernel: e1000e 0000:00:1f.6 eth0: Intel(R) PRO/1000 
> Network Connection
> srp 17 19:44:20 e14 kernel: e1000e 0000:00:1f.6 eth0: MAC: 16, PHY: 12, 
> PBA No: FFFFFF-0FF
> srp 17 19:44:20 e14 kernel: e1000e 0000:00:1f.6 enp0s31f6: renamed from 
> eth0
> srp 17 19:44:24 e14 ModemManager[1434]: <info>  [base-manager] couldn't 
> check support for device '/sys/devices/pci0000:00/0000:00:1f.6': not 
> supported by any plugin
> 
> 
> 
>> You can ask the reporter to mask that GPE via "echo mask >
>> /sys/firmware/acpi/interrupts/gpe6D" and see if the storm goes away
>> then.
>>
>> The only ACPI core issue introduced between 6.9 and 6.10 I'm aware of
>> is the one addressed by this series
>>
>> https://lore.kernel.org/linux-acpi/22385894.EfDdHjke4D@rjwysocki.net/
>>
>> but this is about the EC and the problem here doesn't appear to be
>> EC-related.  It may be worth trying anyway, though.
>>

-- 
js
suse labs