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-rw-r--r--mm/vmalloc.c10
1 files changed, 9 insertions, 1 deletions
diff --git a/mm/vmalloc.c b/mm/vmalloc.c
index 6211a807cb31..6016ab079e2b 100644
--- a/mm/vmalloc.c
+++ b/mm/vmalloc.c
@@ -325,6 +325,7 @@ EXPORT_SYMBOL(vmalloc_to_pfn);
/*** Global kva allocator ***/
+#define VM_LAZY_FREE 0x02
#define VM_VM_AREA 0x04
static DEFINE_SPINLOCK(vmap_area_lock);
@@ -1497,6 +1498,7 @@ struct vm_struct *remove_vm_area(const void *addr)
spin_lock(&vmap_area_lock);
va->vm = NULL;
va->flags &= ~VM_VM_AREA;
+ va->flags |= VM_LAZY_FREE;
spin_unlock(&vmap_area_lock);
vmap_debug_free_range(va->va_start, va->va_end);
@@ -2704,8 +2706,14 @@ static int s_show(struct seq_file *m, void *p)
* s_show can encounter race with remove_vm_area, !VM_VM_AREA on
* behalf of vmap area is being tear down or vm_map_ram allocation.
*/
- if (!(va->flags & VM_VM_AREA))
+ if (!(va->flags & VM_VM_AREA)) {
+ seq_printf(m, "0x%pK-0x%pK %7ld %s\n",
+ (void *)va->va_start, (void *)va->va_end,
+ va->va_end - va->va_start,
+ va->flags & VM_LAZY_FREE ? "unpurged vm_area" : "vm_map_ram");
+
return 0;
+ }
v = va->vm;