On Mon, 19 Feb 2007, Pekka J Enberg wrote:
> If slab->inuse is corrupted, cache_alloc_refill can enter an infinite
> loop as detailed by Michael Richardson in the following post:
> <http://lkml.org/lkml/2007/2/16/292>.
We have seen that corruption too.
> check_spinlock_acquired(cachep);
> +
> + /*
> + * The slab was either on partial or free list so
> + * there must be at least one object available for
> + * allocation.
> + */
> + BUG_ON(slabp->inuse >= cachep->num);
slabp->inuse is an integer and we have seen it become -1. The proposed
test will not catch those cases.
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