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Subject[patch] make sysctl_overcommit_memory enumeration sensible
I see system admins often confused when they sysctl vm.overcommit_memory.
This patch makes overcommit_memory enumeration sensible.

0 - no overcommit
1 - always overcommit
2 - heuristic overcommit (default)

I don't feel this would break any userspace scripts. If it seems OK, I'll
update the documents.

Signed-off-by: Coywolf Qi Hunt <qiyong@fc-cn.com>
---
diff --git a/include/linux/mman.h b/include/linux/mman.h
index 18a5689..e50f5ad 100644
--- a/include/linux/mman.h
+++ b/include/linux/mman.h
@@ -10,9 +10,9 @@
#define MREMAP_MAYMOVE 1
#define MREMAP_FIXED 2

-#define OVERCOMMIT_GUESS 0
+#define OVERCOMMIT_NEVER 0
#define OVERCOMMIT_ALWAYS 1
-#define OVERCOMMIT_NEVER 2
+#define OVERCOMMIT_GUESS 2
extern int sysctl_overcommit_memory;
extern int sysctl_overcommit_ratio;
extern atomic_t vm_committed_space;
--
Coywolf Qi Hunt
-
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