1 files changed, 15 insertions, 3 deletions

diff --git a/drivers/misc/vmware_balloon.c b/drivers/misc/vmware_balloon.c
index db9cd0240c6f..2a1e804a71aa 100644
--- a/drivers/misc/vmware_balloon.c
+++ b/drivers/misc/vmware_balloon.c
@@ -45,7 +45,7 @@
 
 MODULE_AUTHOR("VMware, Inc.");
 MODULE_DESCRIPTION("VMware Memory Control (Balloon) Driver");
-MODULE_VERSION("1.2.1.0-K");
+MODULE_VERSION("1.2.1.1-k");
 MODULE_ALIAS("dmi:*:svnVMware*:*");
 MODULE_ALIAS("vmware_vmmemctl");
 MODULE_LICENSE("GPL");
@@ -101,6 +101,8 @@ MODULE_LICENSE("GPL");
 /* Maximum number of page allocations without yielding processor */
 #define VMW_BALLOON_YIELD_THRESHOLD     1024
 
+/* Maximum number of refused pages we accumulate during inflation cycle */
+#define VMW_BALLOON_MAX_REFUSED         16
 
 /*
  * Hypervisor communication port definitions.
@@ -183,6 +185,7 @@ struct vmballoon {
 
         /* transient list of non-balloonable pages */
         struct list_head refused_pages;
+        unsigned int n_refused_pages;
 
         /* balloon size in pages */
         unsigned int size;
@@ -428,14 +431,21 @@ static int vmballoon_reserve_page(struct vmballoon *b, bool can_sleep)
                 /* inform monitor */
                 locked = vmballoon_send_lock_page(b, page_to_pfn(page));
                 if (!locked) {
+                        STATS_INC(b->stats.refused_alloc);
+
                         if (b->reset_required) {
                                 __free_page(page);
                                 return -EIO;
                         }
 
-                        /* place on list of non-balloonable pages, retry allocation */
+                        /*
+                         * Place page on the list of non-balloonable pages
+                         * and retry allocation, unless we already accumulated
+                         * too many of them, in which case take a breather.
+                         */
                         list_add(&page->lru, &b->refused_pages);
-                        STATS_INC(b->stats.refused_alloc);
+                        if (++b->n_refused_pages >= VMW_BALLOON_MAX_REFUSED)
+                                return -EIO;
                 }
         } while (!locked);
 
@@ -483,6 +493,8 @@ static void vmballoon_release_refused_pages(struct vmballoon *b)
                 __free_page(page);
                 STATS_INC(b->stats.refused_free);
         }
+
+        b->n_refused_pages = 0;
 }
 
 /*