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yaml --- r: 138496 b: refs/heads/master c: 002b0ec h: refs/heads/master v: v3
git-mirror · Feb 23, 2009 · 86ec4f2 · 86ec4f2
1 parent dd4ac4b
commit 86ec4f2
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Showing 2 changed files with 10 additions and 3 deletions.
diff --git a/[refs] b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: a5adc91a4b44b5d1706b9d906cc14fe4f312afe9
+refs/heads/master: 002b0ec73dd8b784004e5a013ad9f2fa6274af5a
diff --git a/trunk/arch/powerpc/mm/mmap.c b/trunk/arch/powerpc/mm/mmap.c
@@ -30,9 +30,16 @@
 /*
  * Top of mmap area (just below the process stack).
  *
- * Leave an at least ~128 MB hole.
+ * Leave at least a ~128 MB hole on 32bit applications.
+ *
+ * On 64bit applications we randomise the stack by 1GB so we need to
+ * space our mmap start address by a further 1GB, otherwise there is a
+ * chance the mmap area will end up closer to the stack than our ulimit
+ * requires.
  */
-#define MIN_GAP (128*1024*1024)
+#define MIN_GAP32 (128*1024*1024)
+#define MIN_GAP64 ((128 + 1024)*1024*1024UL)
+#define MIN_GAP ((is_32bit_task()) ? MIN_GAP32 : MIN_GAP64)
 #define MAX_GAP (TASK_SIZE/6*5)
 
 static inline int mmap_is_legacy(void)