[Xen-devel] [PATCH] linux/blktap: make debugging messages a little more meaningful

["Jan Beulich" <JBeulich@xxxxxxxxxx>]

Signed-off-by: Jan Beulich <jbeulich@xxxxxxxxxx>

--- sle11sp1-2010-04-12.orig/drivers/xen/blktap/xenbus.c        2010-04-21 
13:43:49.000000000 +0200
+++ sle11sp1-2010-04-12/drivers/xen/blktap/xenbus.c     2010-04-21 
13:55:58.000000000 +0200
@@ -236,8 +236,11 @@ static void tap_update_blkif_status(blki
                err = PTR_ERR(blkif->xenblkd);
                blkif->xenblkd = NULL;
                xenbus_dev_fatal(blkif->be->dev, err, "start xenblkd");
-               WPRINTK("Error starting thread\n");
-       }
+               WPRINTK("Error starting thread %s\n", name);
+       } else
+               DPRINTK("Thread started for domid %d, connected disk %d\n",
+                       blkif->domid, blkif->dev_num);
+
 }
 
 /**
@@ -327,8 +330,6 @@ static void tap_backend_changed(struct x
        /* Associate tap dev with domid*/
        be->blkif->dev_num = dom_to_devid(be->blkif->domid, be->xenbus_id, 
                                          be->blkif);
-       DPRINTK("Thread started for domid [%d], connecting disk\n", 
-               be->blkif->dev_num);
 
        tap_update_blkif_status(be->blkif);
 }
@@ -342,7 +343,7 @@ static void tap_frontend_changed(struct 
        struct backend_info *be = dev->dev.driver_data;
        int err;
 
-       DPRINTK("\n");
+       DPRINTK("fe_changed(%s,%d)\n", dev->nodename, frontend_state);
 
        switch (frontend_state) {
        case XenbusStateInitialising:

Attachment: xen-blktap-logging.patch
Description: Text document

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