1 files changed, 9 insertions, 0 deletions

diff --git a/arch/x86_64/kernel/sys_x86_64.c b/arch/x86_64/kernel/sys_x86_64.c
index d9798dd433fc..cc7821c68851 100644
--- a/arch/x86_64/kernel/sys_x86_64.c
+++ b/arch/x86_64/kernel/sys_x86_64.c
@@ -105,6 +105,11 @@ arch_get_unmapped_area(struct file *filp, unsigned long addr,
                     (!vma || addr + len <= vma->vm_start))
                         return addr;
         }
+        if (((flags & MAP_32BIT) || test_thread_flag(TIF_IA32))
+            && len <= mm->cached_hole_size) {
+                mm->cached_hole_size = 0;
+                mm->free_area_cache = begin;
+        }
         addr = mm->free_area_cache;
         if (addr < begin) 
                 addr = begin; 
@@ -120,6 +125,7 @@ full_search:
                          */
                         if (start_addr != begin) {
                                 start_addr = addr = begin;
+                                mm->cached_hole_size = 0;
                                 goto full_search;
                         }
                         return -ENOMEM;
@@ -131,6 +137,9 @@ full_search:
                         mm->free_area_cache = addr + len;
                         return addr;
                 }
+                if (addr + mm->cached_hole_size < vma->vm_start)
+                        mm->cached_hole_size = vma->vm_start - addr;
+
                 addr = vma->vm_end;
         }
 }