linux-kernel - Re: ACPI IRQ storm with 6.10

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Message-ID: <bd149809-f670-4b5d-a18a-f1f63624265f@kernel.org>
Date: Wed, 14 Aug 2024 08:47:54 +0200
From: Jiri Slaby <jirislaby@...nel.org>
To: "Rafael J. Wysocki" <rafael@...nel.org>, Len Brown <lenb@...nel.org>,
 "linux-acpi@...r.kernel.org" <linux-acpi@...r.kernel.org>
Cc: Linux kernel mailing list <linux-kernel@...r.kernel.org>,
 Linux regressions mailing list <regressions@...ts.linux.dev>
Subject: Re: ACPI IRQ storm with 6.10

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?
> 
> thanks,-- 
js