zio_buf.patch

diff --git a/module/zfs/zio.c b/module/zfs/zio.c
index 8f8d86f..be3f97b 100644
--- a/module/zfs/zio.c
+++ b/module/zfs/zio.c
@@ -263,7 +263,10 @@ zio_buf_alloc(size_t size)
 	size_t c = (size - 1) >> SPA_MINBLOCKSHIFT;
 
 	ASSERT(c < SPA_MAXBLOCKSIZE >> SPA_MINBLOCKSHIFT);
-
+#ifdef _KERNEL
+	if (size <= 8192)
+		return kmalloc(size, GFP_NOIO);
+#endif
 	return (kmem_cache_alloc(zio_buf_cache[c], KM_PUSHPAGE | KM_NODEBUG));
 }
 
@@ -279,7 +282,10 @@ zio_data_buf_alloc(size_t size)
 	size_t c = (size - 1) >> SPA_MINBLOCKSHIFT;
 
 	ASSERT(c < SPA_MAXBLOCKSIZE >> SPA_MINBLOCKSHIFT);
-
+#ifdef _KERNEL
+	if (size <= 8192)
+		return kmalloc(size, GFP_NOIO);
+#endif
 	return (kmem_cache_alloc(zio_data_buf_cache[c],
 	    KM_PUSHPAGE | KM_NODEBUG));
 }
@@ -290,7 +296,12 @@ zio_buf_free(void *buf, size_t size)
 	size_t c = (size - 1) >> SPA_MINBLOCKSHIFT;
 
 	ASSERT(c < SPA_MAXBLOCKSIZE >> SPA_MINBLOCKSHIFT);
-
+#ifdef _KERNEL
+	if (size <= 8192) {
+		kfree(buf);
+		return;
+	}
+#endif
 	kmem_cache_free(zio_buf_cache[c], buf);
 }
 
@@ -300,7 +311,12 @@ zio_data_buf_free(void *buf, size_t size)
 	size_t c = (size - 1) >> SPA_MINBLOCKSHIFT;
 
 	ASSERT(c < SPA_MAXBLOCKSIZE >> SPA_MINBLOCKSHIFT);
-
+#ifdef _KERNEL
+	if (size <= 8192) {
+		kfree(buf);
+		return;
+	}
+#endif
 	kmem_cache_free(zio_data_buf_cache[c], buf);
 }