Bug 10146

Summary:	2.6.25-rc: complete lockup on boot/start of X (bisected)
Product:	Process Management	Reporter:	Rafael J. Wysocki (rjw)
Component:	Scheduler	Assignee:	Ingo Molnar (mingo)
Status:	CLOSED CODE_FIX
Severity:	normal	CC:	a.p.zijlstra, marcin.slusarz
Priority:	P1
Hardware:	All
OS:	Linux
Kernel Version:	2.6.25-rc	Subsystem:
Regression:	Yes	Bisected commit-id:
Bug Depends on:
Bug Blocks:	9832

Description Rafael J. Wysocki 2008-03-02 13:40:29 UTC

Subject         : 2.6.25-rc: complete lockup on boot/start of X (bisected)
Submitter       : Marcin Slusarz <marcin.slusarz@gmail.com>
Date            : 2008-03-02 20:00
References      : http://lkml.org/lkml/2008/3/2/91
Handled-By      : Peter Zijlstra <a.p.zijlstra@chello.nl>

This entry is being used for tracking a regression from 2.6.24.  Please don't
close it until the problem is fixed in the mainline.

Comment 1 Rafael J. Wysocki 2008-03-02 13:42:21 UTC

Caused by:

commit 8f4d37ec073c17e2d4aa8851df5837d798606d6f
Author: Peter Zijlstra <a.p.zijlstra@chello.nl>
Date:   Fri Jan 25 21:08:29 2008 +0100

    sched: high-res preemption tick

Comment 2 Rafael J. Wysocki 2008-03-05 15:47:30 UTC

Is there any progress wrt this regression?

Comment 3 Rafael J. Wysocki 2008-03-23 13:13:31 UTC

Patch : http://lkml.org/lkml/2008/3/23/269

Comment 4 Marcin Slusarz 2008-03-26 16:33:10 UTC

fixed in mainline by 92896bd9fd75b1c993b92874d339a8088bb75560
"Don't 'printk()' while holding xtime lock for writing"