Re: 2.6.17-rc5-mm1

["Martin J. Bligh" <mbligh@mbligh.org>]

Ingo Molnar wrote:
> * Andrew Morton <akpm@osdl.org> wrote:
> 
> 
>>>EIP is at check_deadlock+0x15/0xe0
> 
> 
>>>  <c012b77b> check_deadlock+0xa5/0xe0  <c012b922> 
>>>debug_mutex_add_waiter+0x46/0x55
>>>  <c02d50de> __mutex_lock_slowpath+0x9e/0x1c0  <c0160061> 
>>>lookup_create+0x19/0x5b
>>>  <c016043a> sys_mkdirat+0x4c/0xc3  <c01604c0> sys_mkdir+0xf/0x13
>>>  <c02d6217> syscall_call+0x7/0xb
>>
>>Looks like the lock validator came unstuck.  But there's so much other 
>>crap happening in there it's hard to tell.  Did you try it without all 
>>the lockdep stuff enabled?
> 
> 
> AFAICS this isnt the lock validator but the normal mutex debugging code 
> (CONFIG_DEBUG_MUTEXES). The log does not indicate that lockdep was 
> enabled.

Buggered if I know how that got turned on. I thought we turned it off
by default now? That's what screwed up all the perf results before.

http://test.kernel.org/abat/33803/build/dotconfig
That's the build config it ran with.

CONFIG_DEBUG_MUTEXES=y

Grrr. Humpf. I can't see the option being turned on for lockdep ...
what was the config option, and is it enabled by default?

M.