linux-kernel - Re: ACPI IRQ storm with 6.10

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Message-ID: <CAJZ5v0jrgC+cvjDfw+vQ1jyVz1oj28uTf9k+-Kk2EAPJj3VmdQ@mail.gmail.com>
Date: Fri, 16 Aug 2024 20:29:18 +0200
From: "Rafael J. Wysocki" <rafael@...nel.org>
To: Jiri Slaby <jirislaby@...nel.org>
Cc: "Rafael J. Wysocki" <rafael@...nel.org>, Len Brown <lenb@...nel.org>, 
	"linux-acpi@...r.kernel.org" <linux-acpi@...r.kernel.org>, 
	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 Wed, Aug 14, 2024 at 8:48 AM Jiri Slaby <jirislaby@...nel.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?

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.