Bug 198929

Summary:	Interrupt storm after suspend causes one busy kworker
Product:	ACPI	Reporter:	Paul Menzel (pmenzel+bugzilla.kernel.org)
Component:	EC	Assignee:	acpi_ec
Status:	CLOSED INSUFFICIENT_DATA
Severity:	normal	CC:	lenb, regressions, rjw, rui.zhang, tomasz.warniello, yu.c.chen
Priority:	P1
Hardware:	All
OS:	Linux
Kernel Version:	4.16-rc1	Subsystem:
Regression:	No	Bisected commit-id:

Description Paul Menzel 2018-02-25 12:14:37 UTC

On the laptop TUXEDO Book 1406 since Linux 4.16-rc1, sometimes after resume from ACPI S3, the fan starts spinning really loud. Looking with `top`, one kworker thread(?) uses one CPU fully.

Checking with `$ grep -R . /sys/firmware/acpi/interrupts/`, the interrupts seem to three lines have really high values. (I accidentally overrode my file with the high values in it.)

1. /sys/firmware/acpi/interrupts/gpe66:      19  EN     enabled      unmasked
2. /sys/firmware/acpi/interrupts/sci:     126
3. /sys/firmware/acpi/interrupts/gpe50:     104  EN     enabled      unmasked
4. /sys/firmware/acpi/interrupts/gpe_all:     126

Do you know of changes in Linux 4.16-rc1, which could cause this?

Comment 1 Thorsten Leemhuis 2018-02-26 09:32:40 UTC

JFYI: This issues is tracked in the regression reports for Linux 4.16 (http://bit.ly/lnxregrep416 ) with this id:

Linux-Regression-ID: lr#41c451

Please include this line in the comment section of patches that are supposed to fix the issue. Please also mention the string once in other mailinglist threads or different bug tracking entries if you or someone else start to discuss the issue there. By including that string you make it a whole lot easier to track where an issue gets discussed and how far patches to fix it have made it. For more details on this please see here: http://bit.ly/lnxregtrackid

Thx for your help. Ciao, Thorsten

Comment 2 Chen Yu 2018-03-06 17:40:29 UTC

might need to check acpidump table to figure out what gpe50 and 66 are.

Comment 3 Chen Yu 2018-03-12 01:27:15 UTC

ping.

Comment 4 Zhang Rui 2018-05-02 03:51:29 UTC

@paul, do you still have the machine? if yes, please attach the acpidump.

Comment 5 Zhang Rui 2018-05-30 06:09:22 UTC

Bug closed as there is no response from Paul.
please feel free to reopen it if you can provide the information needed.