Bug 10864

Summary:	[regression][bisected] ~90,000 wakeups as of 2.6.26-rc3
Product:	Platform Specific/Hardware	Reporter:	Rafael J. Wysocki (rjw)
Component:	i386	Assignee:	platform_i386
Status:	CLOSED CODE_FIX
Severity:	normal	CC:	mingo, nm127
Priority:	P1
Hardware:	All
OS:	Linux
Kernel Version:	2.6.26-rc3	Subsystem:
Regression:	Yes	Bisected commit-id:
Bug Depends on:
Bug Blocks:	10492
Attachments:	used .config for 2.6.26-rc6 full dmesg

Description Rafael J. Wysocki 2008-06-05 14:46:51 UTC

Subject    : [regression][bisected] ~90,000 wakeups as of 2.6.26-rc3
Submitter  : Németh Márton <nm127@freemail.hu>
Date       : 2008-06-03 5:18
References : http://marc.info/?l=linux-kernel&m=121247101601790&w=4

This entry is being used for tracking a regression from 2.6.25.  Please don't
close it until the problem is fixed in the mainline.

Comment 1 Rafael J. Wysocki 2008-06-05 14:48:08 UTC

Caused by:

commit 6e908947b4995bc0e551a8257c586d5c3e428201
Author: Ingo Molnar <mingo@elte.hu>
Date:   Fri Mar 21 14:32:36 2008 +0100

    x86: fix ioapic bug again

Comment 2 Márton Németh 2008-06-06 00:16:21 UTC

See also bug #9489.

Comment 3 Márton Németh 2008-06-06 13:27:16 UTC

Still see this behaviour as of 2.6.26-rc5.

Comment 4 Márton Németh 2008-06-13 23:19:53 UTC

Created attachment 16465 [details]
used .config for 2.6.26-rc6

In case of kernel version 2.6.26-rc6 there are only ~50 wakeups per second when the system is in idle. I think the problem is fixed at this version.

Comment 5 Márton Németh 2008-06-13 23:20:38 UTC

Created attachment 16466 [details]
full dmesg