commit 168ccc11c323af885de353d9e045c0c1f78f6f2f
author Jan Kiszka <jan.kiszka@web.de> Sun Jun 07 11:30:25 2009 +0200
committer Blue Swirl <blauwirbel@gmail.com> Sun Jun 07 16:40:22 2009 +0300
tree d75e9a932496d36c94f274aad5d0039f6df0f6a2
parent 4ca1a9c62af1b98a359254546cd8e9999c892670

kvm: Improve upgrade notes when facing unsupported kernels

Users complained that it is not obvious what to do when kvm refuses to
build or run due to an unsupported host kernel, so let's improve the
hints.

Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>

kvm-all.c

diff --git a/kvm-all.c b/kvm-all.c
index c89e3b1..b24d876 100644
--- a/kvm-all.c
+++ b/kvm-all.c
@@ -404,6 +404,9 @@
 
 int kvm_init(int smp_cpus)
 {
+    static const char upgrade_note[] =
+        "Please upgrade to at least kernel 2.6.29 or recent kvm-kmod\n"
+        "(see http://sourceforge.net/projects/kvm).\n";
     KVMState *s;
     int ret;
     int i;
@@ -454,7 +457,8 @@
      */
     if (!kvm_check_extension(s, KVM_CAP_USER_MEMORY)) {
         ret = -EINVAL;
-        fprintf(stderr, "kvm does not support KVM_CAP_USER_MEMORY\n");
+        fprintf(stderr, "kvm does not support KVM_CAP_USER_MEMORY\n%s",
+                upgrade_note);
         goto err;
     }
 
@@ -465,8 +469,8 @@
         ret = -EINVAL;
 
         fprintf(stderr,
-                "KVM kernel module broken (DESTROY_MEMORY_REGION)\n"
-                "Please upgrade to at least kvm-81.\n");
+                "KVM kernel module broken (DESTROY_MEMORY_REGION).\n%s",
+                upgrade_note);
         goto err;
     }