[Xen-devel] [PATCH V2 1/5] libxl: bump LIBXL_MAXMEM_CONSTANT to 2048

[Wei Liu <wei.liu2@xxxxxxxxxx>]

When using OVMF we need to have 1MiB of memory in place for firmware.
Without this change we have:

(XEN) HVM128: Loading OVMF ...
(XEN) page_alloc.c:1460:d128 Over-allocation for domain 128: 33025 > 33024
(XEN) memory.c:132:d128 Could not allocate order=0 extent: id=128 memflags=0 (0 
of 1)

This is not a fatal error as hvmloader will instead use low memory to
load OVMF, but it's better to eliminate such error.

Changing this constant doesn't necessary increase the total amount of
memory a guest uses because it's just a limit.

Signed-off-by: Wei Liu <wei.liu2@xxxxxxxxxx>
Cc: Ian Campbell <ian.campbell@xxxxxxxxxx>
Cc: Ian Jackson <ian.jackson@xxxxxxxxxxxxx>
---
 tools/libxl/libxl_internal.h |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tools/libxl/libxl_internal.h b/tools/libxl/libxl_internal.h
index 165dc00..908af20 100644
--- a/tools/libxl/libxl_internal.h
+++ b/tools/libxl/libxl_internal.h
@@ -87,7 +87,7 @@
 #define LIBXL_QEMU_BODGE_TIMEOUT 2
 #define LIBXL_XENCONSOLE_LIMIT 1048576
 #define LIBXL_XENCONSOLE_PROTOCOL "vt100"
-#define LIBXL_MAXMEM_CONSTANT 1024
+#define LIBXL_MAXMEM_CONSTANT 2048
 #define LIBXL_PV_EXTRA_MEMORY 1024
 #define LIBXL_HVM_EXTRA_MEMORY 2048
 #define LIBXL_MIN_DOM0_MEM (128*1024)
-- 
1.7.10.4


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