[Crash-utility] [PATCH] Make 'kmem -S' work on kernel 3.11

[Anatol Pomozov]

Signed-off-by: Anatol Pomozov <anatol.pomozov at gmail.com>
---
 memory.c | 26 +++++++++++++++++---------
 1 file changed, 17 insertions(+), 9 deletions(-)

diff --git a/memory.c b/memory.c
index b57c1ed..56df54a 100755
--- a/memory.c
+++ b/memory.c
@@ -323,6 +323,7 @@ vm_init(void)
 	int i, len, dimension;
 	struct syment *sp_array[2];
 	ulong value1, value2;
+	char *kmem_cache_node_struct;
 
         MEMBER_OFFSET_INIT(task_struct_mm, "task_struct", "mm");
         MEMBER_OFFSET_INIT(mm_struct_mmap, "mm_struct", "mmap");
@@ -548,10 +549,12 @@ vm_init(void)
 
 			if (MEMBER_EXISTS("kmem_cache", "lists"))
 				MEMBER_OFFSET_INIT(kmem_cache_s_lists, "kmem_cache", "lists");
-			else if (MEMBER_EXISTS("kmem_cache", "nodelists")) {
+			else if (MEMBER_EXISTS("kmem_cache", "nodelists") ||
+					 MEMBER_EXISTS("kmem_cache", "node")) {
+				char *nodelists_field = MEMBER_EXISTS("kmem_cache", "node") ? "node" : "nodelists";
                 		vt->flags |= PERCPU_KMALLOC_V2_NODES;
-				MEMBER_OFFSET_INIT(kmem_cache_s_lists, "kmem_cache", "nodelists");
-				if (MEMBER_TYPE("kmem_cache", "nodelists") == TYPE_CODE_PTR) {
+				MEMBER_OFFSET_INIT(kmem_cache_s_lists, "kmem_cache", nodelists_field);
+				if (MEMBER_TYPE("kmem_cache", nodelists_field) == TYPE_CODE_PTR) {
 					int nr_node_ids;
 					/* 
 					 * nodelists now a pointer to an outside array 
@@ -563,9 +566,12 @@ vm_init(void)
 						vt->kmem_cache_len_nodes = nr_node_ids;
 					} else
 						vt->kmem_cache_len_nodes = 1;
-				} else
+				} else {
+					// This should never happen with kmem_cache.node,
+					// only with kmem_cache.nodelists
 					ARRAY_LENGTH_INIT(vt->kmem_cache_len_nodes, NULL, 
 						"kmem_cache.nodelists", NULL, 0);
+				}
 			}
 			MEMBER_OFFSET_INIT(kmem_cache_s_array, "kmem_cache", "array");
 			ARRAY_LENGTH_INIT(len, NULL, "kmem_cache.array", NULL, 0);
@@ -590,15 +596,17 @@ vm_init(void)
 		MEMBER_OFFSET_INIT(array_cache_limit, "array_cache", "limit");
 		STRUCT_SIZE_INIT(array_cache, "array_cache");
 
+		// kmem_list3 renamed to kmem_cache_node in kernel 3.10
+		kmem_cache_node_struct = STRUCT_EXISTS("kmem_cache_node") ? "kmem_cache_node" : "kmem_list3";
 		MEMBER_OFFSET_INIT(kmem_list3_slabs_partial, 
-			"kmem_list3", "slabs_partial");
+			kmem_cache_node_struct, "slabs_partial");
 		MEMBER_OFFSET_INIT(kmem_list3_slabs_full, 
-			"kmem_list3", "slabs_full");
+			kmem_cache_node_struct, "slabs_full");
 		MEMBER_OFFSET_INIT(kmem_list3_slabs_free, 
-			"kmem_list3", "slabs_free");
+			kmem_cache_node_struct, "slabs_free");
 		MEMBER_OFFSET_INIT(kmem_list3_free_objects, 
-			"kmem_list3", "free_objects");
-		MEMBER_OFFSET_INIT(kmem_list3_shared, "kmem_list3", "shared");
+			kmem_cache_node_struct, "free_objects");
+		MEMBER_OFFSET_INIT(kmem_list3_shared, kmem_cache_node_struct, "shared");
 	} else if (MEMBER_EXISTS("kmem_cache", "cpu_slab") &&
 		STRUCT_EXISTS("kmem_cache_node")) {
 		vt->flags |= KMALLOC_SLUB;
-- 
1.8.3