diff --git a/net/sunrpc/cache.c b/net/sunrpc/cache.c
index 2990a7ab9e2a878ea4ec208ff8a3500f0762e8ff..20c93b68505e6d21481fe8affa6adfbd2ad7bf49 100644
--- a/net/sunrpc/cache.c
+++ b/net/sunrpc/cache.c
@@ -909,7 +909,7 @@ static ssize_t cache_do_downcall(char *kaddr, const char __user *buf,
 static ssize_t cache_slow_downcall(const char __user *buf,
 				   size_t count, struct cache_detail *cd)
 {
-	static char write_buf[8192]; /* protected by queue_io_mutex */
+	static char write_buf[32768]; /* protected by queue_io_mutex */
 	ssize_t ret = -EINVAL;
 
 	if (count >= sizeof(write_buf))