Re: [PATCH mm,percpu_ref,rcu 4/6] mm: Make mem_obj_dump() vmalloc() dumps include start and length

[Vlastimil Babka]

On 1/6/21 2:17 AM, paulmck@xxxxxxxxxx wrote:
> From: "Paul E. McKenney" <paulmck@xxxxxxxxxx>
> 
> This commit adds the starting address and number of pages to the vmalloc()
> information dumped by way of vmalloc_dump_obj().
> 
> Cc: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
> Cc: Joonsoo Kim <iamjoonsoo.kim@xxxxxxx>
> Cc: <linux-mm@xxxxxxxxx>
> Reported-by: Andrii Nakryiko <andrii@xxxxxxxxxx>
> Suggested-by: Vlastimil Babka <vbabka@xxxxxxx>
> Signed-off-by: Paul E. McKenney <paulmck@xxxxxxxxxx>

Acked-by: Vlastimil Babka <vbabka@xxxxxxx>

> ---
>  mm/vmalloc.c | 3 ++-
>  1 file changed, 2 insertions(+), 1 deletion(-)
> 
> diff --git a/mm/vmalloc.c b/mm/vmalloc.c
> index c274ea4..e3229ff 100644
> --- a/mm/vmalloc.c
> +++ b/mm/vmalloc.c
> @@ -3456,7 +3456,8 @@ bool vmalloc_dump_obj(void *object)
>  	vm = find_vm_area(objp);
>  	if (!vm)
>  		return false;
> -	pr_cont(" vmalloc allocated at %pS\n", vm->caller);
> +	pr_cont(" %u-page vmalloc region starting at %#lx allocated at %pS\n",
> +		vm->nr_pages, (unsigned long)vm->addr, vm->caller);
>  	return true;
>  }
>  
>