xen-blkback: print stats about persistent grants

Signed-off-by: Roger Pau Monné <roger.pau@citrix.com>
Cc: xen-devel@lists.xen.org
Cc: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>

diff --git a/drivers/block/xen-blkback/blkback.c b/drivers/block/xen-blkback/blkback.c
index dd5b2fe..f7526db 100644 (file)
--- a/drivers/block/xen-blkback/blkback.c
+++ b/drivers/block/xen-blkback/blkback.c
@@ -382,10 +382,12 @@ irqreturn_t xen_blkif_be_int(int irq, void *dev_id)
 static void print_stats(struct xen_blkif *blkif)
 {
        pr_info("xen-blkback (%s): oo %3llu  |  rd %4llu  |  wr %4llu  |  f %4llu"
-                "  |  ds %4llu\n",
+                "  |  ds %4llu | pg: %4u/%4u\n",
                 current->comm, blkif->st_oo_req,
                 blkif->st_rd_req, blkif->st_wr_req,
-                blkif->st_f_req, blkif->st_ds_req);
+                blkif->st_f_req, blkif->st_ds_req,
+                blkif->persistent_gnt_c,
+                max_mapped_grant_pages(blkif->blk_protocol));
        blkif->st_print = jiffies + msecs_to_jiffies(10 * 1000);
        blkif->st_rd_req = 0;
        blkif->st_wr_req = 0;