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

Message ID 20210106011750.13709-4-paulmck@kernel.org (mailing list archive)
State New
Headers show
Series Export return addresses etc. for better diagnostics | expand

Commit Message

Paul E. McKenney Jan. 6, 2021, 1:17 a.m. UTC
From: "Paul E. McKenney" <paulmck@kernel.org>

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@linux-foundation.org>
Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com>
Cc: <linux-mm@kvack.org>
Reported-by: Andrii Nakryiko <andrii@kernel.org>
Suggested-by: Vlastimil Babka <vbabka@suse.cz>
Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
---
 mm/vmalloc.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

Comments

Vlastimil Babka Jan. 8, 2021, 3:30 p.m. UTC | #1
On 1/6/21 2:17 AM, paulmck@kernel.org wrote:
> From: "Paul E. McKenney" <paulmck@kernel.org>
> 
> 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@linux-foundation.org>
> Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com>
> Cc: <linux-mm@kvack.org>
> Reported-by: Andrii Nakryiko <andrii@kernel.org>
> Suggested-by: Vlastimil Babka <vbabka@suse.cz>
> Signed-off-by: Paul E. McKenney <paulmck@kernel.org>

Acked-by: Vlastimil Babka <vbabka@suse.cz>

> ---
>  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;
>  }
>  
>
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Patch

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;
 }