[tip: core/rcu] mm: Make mem_obj_dump() vmalloc() dumps include start and length

[tip-bot2 for Paul E. McKenney]

The following commit has been merged into the core/rcu branch of tip:

Commit-ID:     bd34dcd4120d7e358baac9c22ef1321bd0c22079
Gitweb:        https://git.kernel.org/tip/bd34dcd4120d7e358baac9c22ef1321bd0c22079
Author:        Paul E. McKenney <paulmck@xxxxxxxxxx>
AuthorDate:    Wed, 09 Dec 2020 15:15:27 -08:00
Committer:     Paul E. McKenney <paulmck@xxxxxxxxxx>
CommitterDate: Fri, 22 Jan 2021 15:24:10 -08:00

mm: Make mem_obj_dump() vmalloc() dumps include start and length

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>
Acked-by: Vlastimil Babka <vbabka@xxxxxxx>
Tested-by: Naresh Kamboju <naresh.kamboju@xxxxxxxxxx>
Signed-off-by: Paul E. McKenney <paulmck@xxxxxxxxxx>
---
 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;
 }