From: Benjamin Herrenschmidt <benh@kernel.crashing.org>
To: paulmck@linux.vnet.ibm.com
Cc: linuxppc-dev@ozlabs.org, paulus@samba.org
Subject: Re: BUG: scheduling while atomic: swapper/0/0x00000002
Date: Thu, 10 Jun 2010 09:20:08 +1000 [thread overview]
Message-ID: <1276125608.1962.0.camel@pasglop> (raw)
In-Reply-To: <20100609215229.GA12774@linux.vnet.ibm.com>
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..
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:[~2010-06-09 23:20 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 [this message]
2010-06-10 1:08 ` Paul E. McKenney
2010-06-28 16:49 ` Paul E. McKenney
2010-06-28 21:29 ` Benjamin Herrenschmidt
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