mm: vmalloc failure flush fix

[h-e-n] / mm / vmalloc.c

diff --git a/mm/vmalloc.c b/mm/vmalloc.c
index 46aab4d..04f5e32 100644 (file)
--- a/mm/vmalloc.c
+++ b/mm/vmalloc.c
@@ -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)