Commit-ID: 1c5ee6cab07829f0ed9adf70b7fccb0b0dc7423a
Gitweb: http://git.kernel.org/tip/1c5ee6cab07829f0ed9adf70b7fccb0b0dc7423a
Author: Sasha Levin <levinsasha928@xxxxxxxxx>
AuthorDate: Mon, 30 May 2011 20:27:54 +0300
Committer: Pekka Enberg <penberg@xxxxxxxxxx>
CommitDate: Thu, 2 Jun 2011 11:37:56 +0300
kvm tools: Pause/resume guest using SIGUSR2
Make SIGUSR2 pause/resume a guest, this allows to easily test
pausing a guest.
Can be tested using cmdline 'kill -USR2 $(pidof kvm)'.
Signed-off-by: Sasha Levin <levinsasha928@xxxxxxxxx>
Signed-off-by: Pekka Enberg <penberg@xxxxxxxxxx>
---
tools/kvm/kvm-run.c | 15 +++++++++++++++
1 files changed, 15 insertions(+), 0 deletions(-)
diff --git a/tools/kvm/kvm-run.c b/tools/kvm/kvm-run.c
index 761ac0d..b0ef333 100644
--- a/tools/kvm/kvm-run.c
+++ b/tools/kvm/kvm-run.c
@@ -165,6 +165,20 @@ static void handle_sigusr1(int sig)
mb();
}
+/* Pause/resume the guest using SIGUSR2 */
+static int is_paused;
+
+static void handle_sigusr2(int sig)
+{
+ if (is_paused)
+ kvm__continue();
+ else
+ kvm__pause();
+
+ is_paused = !is_paused;
+ pr_info("Guest %s\n", is_paused ? "paused" : "resumed");
+}
+
static void handle_sigquit(int sig)
{
int i;
@@ -422,6 +436,7 @@ int kvm_cmd_run(int argc, const char **argv, const char *prefix)
signal(SIGALRM, handle_sigalrm);
signal(SIGQUIT, handle_sigquit);
signal(SIGUSR1, handle_sigusr1);
+ signal(SIGUSR2, handle_sigusr2);
nr_online_cpus = sysconf(_SC_NPROCESSORS_ONLN);
--
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