diff mbox

[15/18] kvm: Flush coalesced mmio buffer on IO window exits

Message ID fd15dae674f6947cdde95195ba3a82fdd8f9932b.1295642900.git.jan.kiszka@web.de
State New
Headers show

Commit Message

Jan Kiszka Jan. 21, 2011, 8:48 p.m. UTC 
From: Jan Kiszka <jan.kiszka@siemens.com>

We must flush pending mmio writes if we leave kvm_cpu_exec for an IO
window. Otherwise we risk to loose those requests when migrating to a
diff mbox

Patch

different host during that window.

Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
---
 kvm-all.c |    4 ++--
 1 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/kvm-all.c b/kvm-all.c
index 3a1f63b..9976762 100644
--- a/kvm-all.c
+++ b/kvm-all.c
@@ -918,6 +918,8 @@  int kvm_cpu_exec(CPUState *env)
         cpu_single_env = env;
         kvm_arch_post_run(env, run);
 
+        kvm_flush_coalesced_mmio_buffer();
+
         if (ret == -EINTR || ret == -EAGAIN) {
             cpu_exit(env);
             DPRINTF("io window exit\n");
@@ -930,8 +932,6 @@  int kvm_cpu_exec(CPUState *env)
             abort();
         }
 
-        kvm_flush_coalesced_mmio_buffer();
-
         ret = 0; /* exit loop */
         switch (run->exit_reason) {
         case KVM_EXIT_IO: