1 files changed, 16 insertions, 5 deletions

diff --git a/mm/vmalloc.c b/mm/vmalloc.c
index ba6b0f5f7fac..30f826d484f0 100644
--- a/mm/vmalloc.c
+++ b/mm/vmalloc.c
@@ -324,14 +324,14 @@ static struct vmap_area *alloc_vmap_area(unsigned long size,
 
         BUG_ON(size & ~PAGE_MASK);
 
-        addr = ALIGN(vstart, align);
-
         va = kmalloc_node(sizeof(struct vmap_area),
                         gfp_mask & GFP_RECLAIM_MASK, node);
         if (unlikely(!va))
                 return ERR_PTR(-ENOMEM);
 
 retry:
+        addr = ALIGN(vstart, align);
+
         spin_lock(&vmap_area_lock);
         /* XXX: could have a last_hole cache */
         n = vmap_area_root.rb_node;
@@ -362,7 +362,7 @@ retry:
                                 goto found;
                 }
 
-                while (addr + size >= first->va_start && addr + size <= vend) {
+                while (addr + size > first->va_start && addr + size <= vend) {
                         addr = ALIGN(first->va_end + PAGE_SIZE, align);
 
                         n = rb_next(&first->rb_node);
@@ -522,13 +522,24 @@ static void __purge_vmap_area_lazy(unsigned long *start, unsigned long *end,
 }
 
 /*
+ * Kick off a purge of the outstanding lazy areas. Don't bother if somebody
+ * is already purging.
+ */
+static void try_purge_vmap_area_lazy(void)
+{
+        unsigned long start = ULONG_MAX, end = 0;
+
+        __purge_vmap_area_lazy(&start, &end, 0, 0);
+}
+
+/*
  * Kick off a purge of the outstanding lazy areas.
  */
 static void purge_vmap_area_lazy(void)
 {
         unsigned long start = ULONG_MAX, end = 0;
 
-        __purge_vmap_area_lazy(&start, &end, 0, 0);
+        __purge_vmap_area_lazy(&start, &end, 1, 0);
 }
 
 /*
@@ -539,7 +550,7 @@ static void free_unmap_vmap_area(struct vmap_area *va)
         va->flags |= VM_LAZY_FREE;
         atomic_add((va->va_end - va->va_start) >> PAGE_SHIFT, &vmap_lazy_nr);
         if (unlikely(atomic_read(&vmap_lazy_nr) > lazy_max_pages()))
-                purge_vmap_area_lazy();
+                try_purge_vmap_area_lazy();
 }
 
 static struct vmap_area *find_vmap_area(unsigned long addr)