[Qemu-devel] [PATCH] Flush pending AIO on reboot and shutdown.

[Gleb Natapov]

If there is outstanding IDE IO when BIOS starts execution then IDE
commands sent by BIOS will interfere with it and will leave IDE
subsystem in unpredictable state. This can happen when system reboots
unexpectedly without waiting for IO completion. Flushing IO before exit
prevents data lose.

Signed-off-by: Gleb Natapov <address@hidden>
---

 vl.c |    2 ++
 1 files changed, 2 insertions(+), 0 deletions(-)

diff --git a/vl.c b/vl.c
index e42ae64..afa2a3a 100644
--- a/vl.c
+++ b/vl.c
@@ -7553,6 +7553,7 @@ static int main_loop(void)
             if (reset_requested) {
                 reset_requested = 0;
                 qemu_system_reset();
+                qemu_aio_flush();
                 ret = EXCP_INTERRUPT;
             }
             if (powerdown_requested) {
@@ -9178,6 +9179,7 @@ int main(int argc, char **argv)
     }
 
     main_loop();
+    qemu_aio_flush();
     quit_timers();
 
 #if !defined(_WIN32)