Re: [PATCH] debugobjects: avoid recursive calls with kmemleak

[Catalin Marinas]

On Mon, Nov 26, 2018 at 11:53:43AM -0500, Qian Cai wrote:
> CONFIG_DEBUG_OBJECTS_RCU_HEAD does not play well with kmemleak due to
> recursive calls.
> 
> fill_pool
>   kmemleak_ignore
>     make_black_object
>       put_object
>         __call_rcu (kernel/rcu/tree.c)
>           debug_rcu_head_queue
>             debug_object_activate
>               debug_object_init
>                 fill_pool
>                   kmemleak_ignore
>                     make_black_object
>                       ...
> 
> Hence, adding SLAB_NOLEAKTRACE to kmem_cache_create() to not register a
> newly allocated debug objects at all.
> 
> Suggested-by: Catalin Marinas <catalin.marinas@xxxxxxx>
> Signed-off-by: Qian Cai <cai@xxxxxx>

Acked-by: Catalin Marinas <catalin.marinas@xxxxxxx>