From: "Paul E. McKenney" <paulmck@linux.vnet.ibm.com>
To: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: linuxppc-dev@ozlabs.org, paulus@samba.org
Subject: Re: BUG: scheduling while atomic: swapper/0/0x00000002
Date: Wed, 9 Jun 2010 18:08:54 -0700 [thread overview]
Message-ID: <20100610010854.GA11432@linux.vnet.ibm.com> (raw)
In-Reply-To: <1276125608.1962.0.camel@pasglop>
On Thu, Jun 10, 2010 at 09:20:08AM +1000, Benjamin Herrenschmidt wrote:
> On Wed, 2010-06-09 at 14:52 -0700, Paul E. McKenney wrote:
> > Hello!
> >
> > I get the following during boot on a 16 CPU Power box. Thoughts?
> > (/proc/config attached)
>
> Wow... looks like the preempt count of the idle task got busted or
> something ... how reproduceable ? Something like a record of previous
> interrupts might be useful..
I have seen it only once, but it did get my attention. I will try running
it again this evening when/if kernel-ml8 is free again. 2.6.35-rc2,
I should have mentioned.
Thanx, Paul
> Cheers,
> Ben.
>
> > Thanx, Paul
> >
> > UDP hash table entries: 2048 (order: 6, 262144 bytes)
> > UDP-Lite hash table entries: 2048 (order: 6, 262144 bytes)
> > NET: Registered protocol family 1
> > RPC: Registered udp transport module.
> > RPC: Registered tcp transport module.
> > RPC: Registered tcp NFSv4.1 backchannel transport module.
> > Trying to unpack rootfs image as initramfs...
> > Freeing initrd memory: 2455k freed
> > BUG: scheduling while atomic: swapper/0/0x00000002
> > no locks held by swapper/0.
> > Modules linked in:
> > Call Trace:
> > [c00000008e1afc20] [c000000000011990] .show_stack+0x70/0x184 (unreliable)
> > [c00000008e1afcd0] [c00000000005cb60] .__schedule_bug+0xac/0xd0
> > [c00000008e1afd70] [c0000000005f0c34] .schedule+0xc0/0x894
> > [c00000008e1afe40] [c0000000000142d0] .cpu_idle+0x1f8/0x20c
> > [c00000008e1afed0] [c000000000600b08] .start_secondary+0x3bc/0x3fc
> > [c00000008e1aff90] [c000000000008264] .start_secondary_prolog+0x10/0x14
> > BUG: scheduling while atomic: swapper/0/0x00000002
> > no locks held by swapper/0.
> > Modules linked in:
> > Call Trace:
> > [c00000008e1afc20] [c000000000011990] .show_stack+0x70/0x184 (unreliable)
> > [c00000008e1afcd0] [c00000000005cb60] .__schedule_bug+0xac/0xd0
> > [c00000008e1afd70] [c0000000005f0c34] .schedule+0xc0/0x894
> > [c00000008e1afe40] [c0000000000142d0] .cpu_idle+0x1f8/0x20c
> > [c00000008e1afed0] [c000000000600b08] .start_secondary+0x3bc/0x3fc
> > [c00000008e1aff90] [c000000000008264] .start_secondary_prolog+0x10/0x14
> > BUG: scheduling while atomic: swapper/0/0x00000002
> > no locks held by swapper/0.
> > Modules linked in:
> > Call Trace:
> > [c00000008e1afc20] [c000000000011990] .show_stack+0x70/0x184 (unreliable)
> > [c00000008e1afcd0] [c00000000005cb60] .__schedule_bug+0xac/0xd0
> > [c00000008e1afd70] [c0000000005f0c34] .schedule+0xc0/0x894
> > [c00000008e1afe40] [c0000000000142d0] .cpu_idle+0x1f8/0x20c
> > [c00000008e1afed0] [c000000000600b08] .start_secondary+0x3bc/0x3fc
> > [c00000008e1aff90] [c000000000008264] .start_secondary_prolog+0x10/0x14
> > BUG: scheduling while atomic: swapper/0/0x00000002
> > no locks held by swapper/0.
> > Modules linked in:
> > Call Trace:
> > [c00000008e1afc20] [c000000000011990] .show_stack+0x70/0x184 (unreliable)
> > [c00000008e1afcd0] [c00000000005cb60] .__schedule_bug+0xac/0xd0
> > [c00000008e1afd70] [c0000000005f0c34] .schedule+0xc0/0x894
> > [c00000008e1afe40] [c0000000000142d0] .cpu_idle+0x1f8/0x20c
> > [c00000008e1afed0] [c000000000600b08] .start_secondary+0x3bc/0x3fc
> > [c00000008e1aff90] [c000000000008264] .start_secondary_prolog+0x10/0x14
> > audit: initializing netlink socket (disabled)
> > type=2000 audit(1276043741.388:1): initialized
> > BUG: scheduling while atomic: swapper/0/0x00000002
> > no locks held by swapper/0.
> > Modules linked in:
> > Call Trace:
> > [c00000008e1afc20] [c000000000011990] .show_stack+0x70/0x184 (unreliable)
> > [c00000008e1afcd0] [c00000000005cb60] .__schedule_bug+0xac/0xd0
> > [c00000008e1afd70] [c0000000005f0c34] .schedule+0xc0/0x894
> > [c00000008e1afe40] [c0000000000142d0] .cpu_idle+0x1f8/0x20c
> > [c00000008e1afed0] [c000000000600b08] .start_secondary+0x3bc/0x3fc
> > [c00000008e1aff90] [c000000000008264] .start_secondary_prolog+0x10/0x14
> > BUG: scheduling while atomic: swapper/0/0x00000002
> > no locks held by swapper/0.
> > Modules linked in:
>
>
next prev parent reply other threads:[~2010-06-10 3:13 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-06-09 21:52 BUG: scheduling while atomic: swapper/0/0x00000002 Paul E. McKenney
2010-06-09 23:20 ` Benjamin Herrenschmidt
2010-06-10 1:08 ` Paul E. McKenney [this message]
2010-06-28 16:49 ` Paul E. McKenney
2010-06-28 21:29 ` Benjamin Herrenschmidt
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