[RFC] Check host's minimum memory.

[Masayuki Sunou <fj1826dm@xxxxxxxxxxxxxxxxx>]

Hi

The minimum value of the memory guarded with virsh setmem is 4096KB(4MB).
In general, when host's memory is set to 4MB, the host stops.

Therefore, I propose the patch to which host's minimum value of the memory
is guarded by 256MB.


Signed-off-by: Masayuki Sunou <fj1826dm@xxxxxxxxxxxxxxxxx>

Thanks,
Masayuki Sunou.


libvirt-0.2.0
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Index: libvirt/src/xend_internal.c
===================================================================
RCS file: /data/cvs/libvirt/src/xend_internal.c,v
retrieving revision 1.97
diff -u -p -r1.97 xend_internal.c
--- libvirt/src/xend_internal.c	2 Mar 2007 20:19:08 -0000	1.97
+++ libvirt/src/xend_internal.c	6 Mar 2007 01:42:44 -0000
@@ -2243,6 +2243,9 @@ xenDaemonDomainSetMemory(virDomainPtr do
     if (domain->id < 0 && domain->conn->xendConfigVersion < 3)
         return(-1);
 
+    if (domain->id == 0 && memory < (256 * 1024))
+        return(-1);
+
     snprintf(buf, sizeof(buf), "%lu", memory >> 10);
     return xend_op(domain->conn, domain->name, "op", "mem_target_set",
                    "target", buf, NULL);
Index: libvirt/src/xm_internal.c
===================================================================
RCS file: /data/cvs/libvirt/src/xm_internal.c,v
retrieving revision 1.14
diff -u -p -r1.14 xm_internal.c
--- libvirt/src/xm_internal.c	23 Feb 2007 08:51:30 -0000	1.14
+++ libvirt/src/xm_internal.c	6 Mar 2007 01:42:46 -0000
@@ -1025,6 +1025,9 @@ int xenXMDomainSetMemory(virDomainPtr do
     if (domain->id != -1)
         return (-1);
 
+    if (domain->id == 0 && memory < (256 * 1024))
+        return(-1);
+
     if (!(filename = virHashLookup(nameConfigMap, domain->name)))
         return (-1);
 
Index: libvirt/src/xs_internal.c
===================================================================
RCS file: /data/cvs/libvirt/src/xs_internal.c,v
retrieving revision 1.32
diff -u -p -r1.32 xs_internal.c
--- libvirt/src/xs_internal.c	23 Feb 2007 08:51:30 -0000	1.32
+++ libvirt/src/xs_internal.c	6 Mar 2007 01:42:46 -0000
@@ -434,6 +434,10 @@ xenStoreDomainSetMemory(virDomainPtr dom
     }
     if (domain->id == -1)
         return(-1);
+
+    if (domain->id == 0 && memory < (256 * 1024))
+        return(-1);
+
     snprintf(value, 19, "%lu", memory);
     value[19] = 0;
     ret = virDomainDoStoreWrite(domain, "memory/target", &value[0]);
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