>From a8ca226de8efb4f0447e4ef87bf034cf18996745 Mon Sep 17 00:00:00 2001
From: Izik Eidus <ieidus@xxxxxxxxxx>
Date: Sun, 4 Oct 2009 14:01:31 +0200
Subject: [PATCH] kvm-userspace: add ksm support
Calling to madvise(MADV_MERGEABLE) on the memory allocations.
Signed-off-by: Izik Eidus <ieidus@xxxxxxxxxx>
---
exec.c | 3 +++
1 files changed, 3 insertions(+), 0 deletions(-)
diff --git a/exec.c b/exec.c
index 5c9edf7..406d2cb 100644
--- a/exec.c
+++ b/exec.c
@@ -2538,6 +2538,9 @@ ram_addr_t qemu_ram_alloc(ram_addr_t size)
new_block->host = file_ram_alloc(size, mem_path);
if (!new_block->host) {
new_block->host = qemu_vmalloc(size);
+#ifdef MADV_MERGEABLE
+ madvise(new_block->host, size, MADV_MERGEABLE);
+#endif
}
new_block->offset = last_ram_offset;
new_block->length = size;
--
1.5.6.5
--
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