Re-use the buffer page for pipe data.

This brings the latency back to previous levels, and in
fact seems to drive it a bit lower.

1 files changed, 1 insertions, 0 deletions

diff --git a/include/linux/pipe_fs_i.h b/include/linux/pipe_fs_i.h
index 1e73dd8fd258..62a9de0f51ff 100644
--- a/include/linux/pipe_fs_i.h
+++ b/include/linux/pipe_fs_i.h
@@ -14,6 +14,7 @@ struct pipe_inode_info {
 	wait_queue_head_t wait;
 	unsigned int nrbufs, curbuf;
 	struct pipe_buffer bufs[PIPE_BUFFERS];
+	struct page *tmp_page;
 	unsigned int start;
 	unsigned int readers;
 	unsigned int writers;