Re: [BUG][Resend] 2.6.12-rc3-mm3: Kernel BUG at "mm/slab.c":1219 [update]

[Rafael J. Wysocki]

Hi,

On Monday, 9 of May 2005 23:54, Andrew Morton wrote:
> "Rafael J. Wysocki" <rjw@xxxxxxx> wrote:
> >
> > I get this from 2.6.12-rc3-mm3 on a UP AMD64 box (Asus L5D), 100% of the time:
> > 
> > ]--snip--[
> > ACPI: bus type pci registered
> > PCI: Using configuration type 1
> > mtrr: v2.0 (20020519)
> > kmem_cache_create: Early error in slab <NULL>
> > ----------- [cut here ] --------- [please bite here ] ---------
> > Kernel BUG at "mm/slab.c":1219
> > invalid operand: 0000 [1]
]--snip--[ 
> 
> Something kooky is happening.
> 
> Clearly init_bio() is not passing in a NULL `name' parameter.  Maybe the
> backtrace is screwed due to dopey gcc autoinlining and the bad caller is
> really biovec_init_slabs().  Try removing the
> __cacheline_aligned_mostly_readonly from the declaration of bvec_slabs[].

Heh, it boots without the __cacheline_aligned_mostly_readonly (ie the BUG is
only triggered if the __cacheline_aligned_mostly_readonly is present in the
declaration of bvec_slabs[]).  I've double-checked it.  Interesting ... ;-)

Greets,
Rafael


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