[Devel] Re: v2.6.26-rc7/cgroups: circular locking dependency

[Vegard Nossum]

On Sun, Jun 22, 2008 at 11:10 AM, Cyrill Gorcunov <gorcunov at gmail.com> wrote:
> [Vegard Nossum - Sat, Jun 21, 2008 at 07:38:59PM +0200]
> |  =======================================================
> |  [ INFO: possible circular locking dependency detected ]
> |  2.6.26-rc7 #25
> |  -------------------------------------------------------
> |  bash/10032 is trying to acquire lock:
> |   (&cpu_hotplug.lock){--..}, at: [<c015efbc>] get_online_cpus+0x2c/0x40
> |
> |  but task is already holding lock:
> |   (cgroup_mutex){--..}, at: [<c0160e6f>] cgroup_lock+0xf/0x20

...

> Hi Vegard,
>
> would be interesting to see your config please

Here is my config and vmlinux:

http://www.kernel.org/pub/linux/kernel/people/vegard/kernels/20080621-v2.6.26-rc7/

By the way, I was doing CPU hotplug/unplug at the time.

Thanks :)


Vegard

-- 
"The animistic metaphor of the bug that maliciously sneaked in while
the programmer was not looking is intellectually dishonest as it
disguises that the error is the programmer's own creation."
	-- E. W. Dijkstra, EWD1036
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