Re: [PATCH 0/3] dma-debug: add additional checks

[Joerg Roedel]

On Wed, Mar 18, 2009 at 12:38:47PM +0100, Peter Zijlstra wrote:
> On Wed, 2009-03-18 at 12:23 +0100, Ingo Molnar wrote:
> > another -tip testbox started triggering:
> > 
> >   BUG: MAX_LOCKDEP_ENTRIES too low!
> > 
> > it triggers due to CONFIG_DMA_API_DEBUG=y. Config attached.
> 
> 
> I still have this laying about.. could be we're just at the limit due to
> lock bloat in the kernel, could be dma_api_debug is doing something
> all-together iffy

I had a look and the maximum locking depth in dma-debug code was two.
Attached patch reduces this to one.