Messages in this thread | | | Date | Tue, 11 Apr 2017 11:16:42 -0500 (CDT) | From | Christoph Lameter <> | Subject | Re: [PATCH] mm: Add additional consistency check |
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On Tue, 11 Apr 2017, Michal Hocko wrote:
> static inline void *index_to_obj(struct kmem_cache *cache, struct page *page, > @@ -3813,14 +3818,18 @@ void kfree(const void *objp) > { > struct kmem_cache *c; > unsigned long flags; > + struct page *page; > > trace_kfree(_RET_IP_, objp); > > if (unlikely(ZERO_OR_NULL_PTR(objp))) > return; > + page = virt_to_head_page(obj); > + if (CHECK_DATA_CORRUPTION(!PageSlab(page)))
There is a flag SLAB_DEBUG_OBJECTS that is available for this check. Consistency checks are configuraable in the slab allocator.
Mentioned that before and got this lecture about data consistency checks.
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