[Xen-devel] [PATCH] qemu: ignore xenstore events while paused

[Stefano Stabellini <stefano.stabellini@xxxxxxxxxxxxx>]

Hi all,
when qemu is paused it shouldn't try to handle xenstore events,
especially because when xend removes nodes on xenstore some
spurious events could be generated causing qemu to exit unexpectedly.

Signed-off-by: Stefano Stabellini <stefano.stabellini@xxxxxxxxxxxxx>

---

diff --git a/xenstore.c b/xenstore.c
index 8222df4..aee96f0 100644
--- a/xenstore.c
+++ b/xenstore.c
@@ -921,6 +921,16 @@ void xenstore_process_event(void *opaque)
     if (!vec)
         return;
 
+    /* process dm-command events before everything else */
+    if (!strcmp(vec[XS_WATCH_TOKEN], "dm-command")) {
+        xenstore_process_dm_command_event();
+        goto out;
+    }
+
+    /* if we are paused don't process anything else */
+    if (xen_pause_requested)
+        goto out;
+
     for (i = 0; xenstore_watch_callbacks &&  xenstore_watch_callbacks[i].path; 
i++)
        if (xenstore_watch_callbacks[i].cb &&
            !strcmp(vec[XS_WATCH_TOKEN], xenstore_watch_callbacks[i].path))
@@ -932,11 +942,6 @@ void xenstore_process_event(void *opaque)
         goto out;
     }
 
-    if (!strcmp(vec[XS_WATCH_TOKEN], "dm-command")) {
-        xenstore_process_dm_command_event();
-        goto out;
-    }
-
     if (strncmp(vec[XS_WATCH_TOKEN], "hd", 2) ||
         strlen(vec[XS_WATCH_TOKEN]) != 3)
         goto out;

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