From: Markus Trippelsdorf <markus@trippelsdorf.de>
To: Thomas Gleixner <tglx@linutronix.de>
Cc: linux-kernel@vger.kernel.org
Subject: Re: WARNING: at kernel/cpu/idle.c:96
Date: Thu, 2 May 2013 13:30:11 +0200 [thread overview]
Message-ID: <20130502113011.GA508@x4> (raw)
In-Reply-To: <alpine.LFD.2.02.1305021242180.3972@ionos>
On 2013.05.02 at 12:43 +0200, Thomas Gleixner wrote:
> On Tue, 30 Apr 2013, Markus Trippelsdorf wrote:
>
> > Just booted todays git tree and got the following warning:
> >
> > ------------[ cut here ]------------
> > WARNING: at kernel/cpu/idle.c:96 cpu_startup_entry+0x14d/0x160()
> > Hardware name: System Product Name
> > Pid: 0, comm: swapper/2 Not tainted 3.9.0-03462-gab86e97-dirty #424
> > Call Trace:
> > smpboot: Booting Node 0, Processors #1 #2
> > [<ffffffff8105b7c0>] ? warn_slowpath_common+0x60/0xa0
> > [<ffffffff8108c26d>] ? cpu_startup_entry+0x14d/0x160
> > ---[ end trace 40a24a5550891913 ]---
>
> Fix below.
Unfortunately the fix doesn't work:
------------[ cut here ]------------
WARNING: at kernel/cpu/idle.c:96 cpu_startup_entry+0x14d/0x160()
CPU: 2 PID: 0 Comm: swapper/2 Not tainted 3.9.0-07391-g20b4fb4-dirty #432
Hardware name: System manufacturer System Product Name/M4A78T-E, BIOS 3503 04/13/2011
ffffffff81528e8b ffffffff8105b791 ffff8802168b1fd8 ffff8802168b1fd8
ffff8802168b1fd8 ffff8802168b1fd8 ffff8802168b1fd8 ffffffff8108cc8d
0000000010001b76 0000000000000000 0000000000000000 0000000000000000
Call Trace:
[<ffffffff81528e8b>] ? dump_stack+0xc/0x15
[<ffffffff8105b791>] ? warn_slowpath_common+0x51/0x80
[<ffffffff8108cc8d>] ? cpu_startup_entry+0x14d/0x160
---[ end trace 35da8e4b222a0736 ]---
BTW another issue is that "perf top" shows the following on an otherwise idle
machine:
67.76% [kernel] [k] cpu_startup_entry
12.90% [kernel] [k] amd_e400_idle
--
Markus
next prev parent reply other threads:[~2013-05-02 11:30 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-04-30 15:52 WARNING: at kernel/cpu/idle.c:96 Markus Trippelsdorf
2013-05-02 10:43 ` Thomas Gleixner
2013-05-02 11:30 ` Markus Trippelsdorf [this message]
2013-05-02 13:58 ` Thomas Gleixner
2013-05-02 14:06 ` Markus Trippelsdorf
2013-05-07 14:04 ` Borislav Petkov
2013-05-07 14:32 ` [tip:x86/urgent] x86: Fix idle consolidation fallout tip-bot for Thomas Gleixner
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