kvm: Add handling of EAGAIN when creating timers

timer_create can apparently return -1 and set errno to EAGAIN if the
kernel suffered a temporary failure when allocating a timer. This
happens from time to time, so we need to handle it.

1 files changed, 5 insertions, 2 deletions

diff --git a/src/cpu/kvm/timer.cc b/src/cpu/kvm/timer.cc
index e1f74a552..03cdea6fb 100644
--- a/src/cpu/kvm/timer.cc
+++ b/src/cpu/kvm/timer.cc
@@ -59,8 +59,11 @@ PosixKvmTimer::PosixKvmTimer(int signo, clockid_t clockID,
     sev.sigev_notify = SIGEV_SIGNAL;
     sev.sigev_signo = signo;
     sev.sigev_value.sival_ptr = NULL;
-    if (timer_create(clockID, &sev, &timer) == -1)
-        panic("timer_create");
+
+    while (timer_create(clockID, &sev, &timer) == -1) {
+        if (errno != EAGAIN)
+            panic("timer_create: %i", errno);
+    }
 }
 
 PosixKvmTimer::~PosixKvmTimer()