main-loop: Suppress I/O thread warning under qtest

We do not want to display the "I/O thread spun" warning for test cases
that run under qtest. The first attempt for this (commit
01c22f2cdd4fcf02276ea10f48253850a5fd7259) tested whether qtest_enabled()
was true.

Commit 21a24302e85024dd7b2a151158adbc1f5dc5c4dd correctly recognized
that just testing qtest_enabled() is not sufficient since there are some
tests that do not use the qtest accelerator but just the qtest character
device, and thus replaced qtest_enabled() by qtest_driver().

However, there are also some tests that only use the qtest accelerator
and not the qtest chardev; perhaps most notably the bash iotests.
Therefore, we have to check both qtest_enabled() and qtest_driver().

Signed-off-by: Max Reitz <mreitz@redhat.com>
Message-Id: <20161017180939.27912-1-mreitz@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

diff --git a/main-loop.c b/main-loop.c
index 66c4eb6..ad10bca 100644 (file)
--- a/main-loop.c
+++ b/main-loop.c
@@ -234,7 +234,7 @@ static int os_host_main_loop_wait(int64_t timeout)
     if (!timeout && (spin_counter > MAX_MAIN_LOOP_SPIN)) {
         static bool notified;
 
-        if (!notified && !qtest_driver()) {
+        if (!notified && !qtest_enabled() && !qtest_driver()) {
             fprintf(stderr,
                     "main-loop: WARNING: I/O thread spun for %d iterations\n",
                     MAX_MAIN_LOOP_SPIN);