[PATCH 1/3] kvm tools: ignore balloon signals by default to avoid balloon crash

[Liming Wang <walimisdev@gmail.com>]

If "kvm run" without balloon option, use "kvm balloon" may
crash kvm. So ignore balloon signals by default to avoid this.

Signed-off-by: Liming Wang <walimisdev@gmail.com>
---
 tools/kvm/builtin-run.c |    3 +++
 1 files changed, 3 insertions(+), 0 deletions(-)

diff --git a/tools/kvm/builtin-run.c b/tools/kvm/builtin-run.c
index fa5de27..1ab7122 100644
--- a/tools/kvm/builtin-run.c
+++ b/tools/kvm/builtin-run.c
@@ -469,6 +469,9 @@ int kvm_cmd_run(int argc, const char **argv, const char *prefix)
 	signal(SIGUSR2, handle_sigusr2);
 	signal(SIGKVMSTOP, handle_sigstop);
 	signal(SIGKVMRESUME, handle_sigusr2);
+	/* ignore balloon signal by default if not enable balloon optiion */
+	signal(SIGKVMADDMEM, SIG_IGN);
+	signal(SIGKVMDELMEM, SIG_IGN);
 
 	nr_online_cpus = sysconf(_SC_NPROCESSORS_ONLN);
 
-- 
1.7.0.4