[Xen-changelog] [xen-unstable] libxl: introduce the concept of dom0 minimum memory

[Xen patchbot-unstable <patchbot-unstable@xxxxxxxxxxxxxxxxxxx>]

# HG changeset patch
# User Stefano Stabellini <stefano.stabellini@xxxxxxxxxxxxx>
# Date 1285173644 -3600
# Node ID 49a3c17217340cc1a92748bf186749c932081b44
# Parent  7659c107b2f323c25921681137160c0174d8e37a
libxl: introduce the concept of dom0 minimum memory

Introduce a minimum value for the memory assigned to dom0.

[fixed up for conflicts with libxl__ naming policy changes -iwj]

Signed-off-by: Stefano Stabellini <stefano.stabellini@xxxxxxxxxxxxx>
Signed-off-by: Ian Jackson <ian.jackson@xxxxxxxxxxxxx>
---
 tools/libxl/libxl.c          |    6 ++++++
 tools/libxl/libxl_internal.h |    1 +
 2 files changed, 7 insertions(+)

diff -r 7659c107b2f3 -r 49a3c1721734 tools/libxl/libxl.c
--- a/tools/libxl/libxl.c       Wed Sep 22 17:39:32 2010 +0100
+++ b/tools/libxl/libxl.c       Wed Sep 22 17:40:44 2010 +0100
@@ -2916,6 +2916,12 @@ retry_transaction:
         abort = 1;
         goto out;
     }
+    if (!domid && new_target_memkb < LIBXL_MIN_DOM0_MEM) {
+        LIBXL__LOG(ctx, LIBXL__LOG_ERROR,
+                "new target for dom0 is below the minimum threshold\n");
+        abort = 1;
+        goto out;
+    }
 
     if (relative)
         new_target_memkb = current_target_memkb + target_memkb;
diff -r 7659c107b2f3 -r 49a3c1721734 tools/libxl/libxl_internal.h
--- a/tools/libxl/libxl_internal.h      Wed Sep 22 17:39:32 2010 +0100
+++ b/tools/libxl/libxl_internal.h      Wed Sep 22 17:40:44 2010 +0100
@@ -43,6 +43,7 @@
 #define LIBXL_MAXMEM_CONSTANT 1024
 #define LIBXL_PV_EXTRA_MEMORY 1024
 #define LIBXL_HVM_EXTRA_MEMORY 2048
+#define LIBXL_MIN_DOM0_MEM (128*1024)
 #define QEMU_SIGNATURE "QemuDeviceModelRecord"
 
 #define ARRAY_SIZE(a) (sizeof(a) / sizeof(a[0]))

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