diff --git a/modules/cas_cache/ocf_env.h b/modules/cas_cache/ocf_env.h
index 3773d0c..bdc6f2a 100644
--- a/modules/cas_cache/ocf_env.h
+++ b/modules/cas_cache/ocf_env.h
@@ -39,14 +39,24 @@ static inline void env_free(const void *ptr)
 	kfree(ptr);
 }
 
+static inline void *env_vmalloc_flags(size_t size, int flags)
+{
+	return __vmalloc(size, flags | __GFP_HIGHMEM, PAGE_KERNEL);
+}
+
+static inline void *env_vzalloc_flags(size_t size, int flags)
+{
+	return env_vmalloc_flags(size, flags | __GFP_ZERO);
+}
+
 static inline void *env_vmalloc(size_t size)
 {
-	return vmalloc(size);
+	return env_vmalloc_flags(size, GFP_KERNEL);
 }
 
 static inline void *env_vzalloc(size_t size)
 {
-	return vzalloc(size);
+	return env_vzalloc_flags(size, GFP_KERNEL);
 }
 
 static inline void env_vfree(const void *ptr)
diff --git a/ocf b/ocf
index 1dfae0d..49d8f10 160000
--- a/ocf
+++ b/ocf
@@ -1 +1 @@
-Subproject commit 1dfae0d166441ade6537e0a290edf3fc329f74db
+Subproject commit 49d8f10953250dea64af97bf37e17b9aa72dbfb8