Re: Badness on the Warp

From: Frans Pop
Date: Sun Jun 21 2009 - 00:28:53 EST

On Sunday 21 June 2009, Sean MacLennan wrote:
> I found the source of the badness. The backtrace is correct:
> uic_init_one

So that's in arch/powerpc/sysdev/uic.c.

> ___alloc_bootmem
> ___alloc_bootmem_nopanic
> alloc_arch_preferred_bootmem
> In alloc_arch_preferred_bootmem we have:
> if (WARN_ON_ONCE(slab_is_available()))
> return kzalloc(size, GFP_NOWAIT);
> Since the slab is available (it had better be or the call will return
> NULL), we get the badness message, then a successful return from
> kzalloc.
> I believe the author wants something like:
> if (slab_is_available())
> return kzalloc(size, GFP_NOWAIT);
> else

Well, I myself have no idea. It could also indicate a bug in the uic code.

But let's CC some people responsible for this code. Pekka recently added
this WARN that triggers in your case; David and Paul look to be the
people most involved in the uic code.

Start of the thread is at

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