kvm tools: Print out important command line options at startup

It's important to know what the guest configuration looks like when debugging
issues so print out important command line options at startup:

  $ ./kvm run -k ../../arch/x86/boot/bzImage -m 512
    # kvm run -k ../../arch/x86/boot/bzImage -m 512 -c 1

Suggested-by: Ingo Molnar <mingo@elte.hu>
Cc: Asias He <asias.hejun@gmail.com>
Cc: Avi Kivity <avi@redhat.com>
Cc: Cyrill Gorcunov <gorcunov@gmail.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Prasad Joshi <prasadjoshi124@gmail.com>
Cc: Sasha Levin <levinsasha928@gmail.com>
Signed-off-by: Pekka Enberg <penberg@kernel.org>

diff --git a/tools/kvm/kvm-run.c b/tools/kvm/kvm-run.c
index 9b5176f3f26d64115b0fb20b2b82a58ca1ef83cf..5b5677920f591a672ec8e362c5eba56b9cbc11c7 100644 (file)
--- a/tools/kvm/kvm-run.c
+++ b/tools/kvm/kvm-run.c
@@ -476,6 +476,8 @@ int kvm_cmd_run(int argc, const char **argv, const char *prefix)
        }
        free(hi);
 
+       printf("  # kvm run -k %s -m %Lu -c %d\n", kernel_filename, ram_size / 1023 / 1024, nrcpus);
+
        if (!kvm__load_kernel(kvm, kernel_filename, initrd_filename,
                                real_cmdline))
                die("unable to load kernel %s", kernel_filename);