From: Izik Eidus <ieidus@redhat.com>
To: qemu-devel@nongnu.org
Subject: [Qemu-devel] [PATCH] ksm support
Date: Thu, 08 Oct 2009 16:39:39 +0200 [thread overview]
Message-ID: <4ACDF9AB.6040600@redhat.com> (raw)
[-- Attachment #1: Type: text/plain, Size: 831 bytes --]
Attached patch add ksm support
(below is inline version)
From cd20e52d0542b5f8716333b8abfcb8112684502b Mon Sep 17 00:00:00 2001
From: Izik Eidus <ieidus@redhat.com>
Date: Thu, 8 Oct 2009 16:31:18 +0200
Subject: [PATCH] qemu ksm support
call MADV_MERGEABLE on guest memory allocations.
Signed-off-by: Izik Eidus <ieidus@redhat.com>
---
exec.c | 3 +++
1 files changed, 3 insertions(+), 0 deletions(-)
diff --git a/exec.c b/exec.c
index d9be575..076d26b 100644
--- a/exec.c
+++ b/exec.c
@@ -2412,6 +2412,9 @@ ram_addr_t qemu_ram_alloc(ram_addr_t size)
new_block = qemu_malloc(sizeof(*new_block));
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;
--
1.6.2.5
[-- Attachment #2: 0001-qemu-ksm-support.patch --]
[-- Type: text/plain, Size: 768 bytes --]
>From cd20e52d0542b5f8716333b8abfcb8112684502b Mon Sep 17 00:00:00 2001
From: Izik Eidus <ieidus@redhat.com>
Date: Thu, 8 Oct 2009 16:31:18 +0200
Subject: [PATCH] qemu ksm support
call MADV_MERGEABLE on guest memory allocations.
Signed-off-by: Izik Eidus <ieidus@redhat.com>
---
exec.c | 3 +++
1 files changed, 3 insertions(+), 0 deletions(-)
diff --git a/exec.c b/exec.c
index d9be575..076d26b 100644
--- a/exec.c
+++ b/exec.c
@@ -2412,6 +2412,9 @@ ram_addr_t qemu_ram_alloc(ram_addr_t size)
new_block = qemu_malloc(sizeof(*new_block));
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;
--
1.6.2.5
reply other threads:[~2009-10-08 14:31 UTC|newest]
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