From 35a09d71ec596b8c9b0f366885d76de7be43ca60 Mon Sep 17 00:00:00 2001
From: Michael Kerrisk <mtk.manpages@gmail.com>
Date: Fri, 13 Jun 2008 10:51:02 +0000
Subject: [PATCH] SYNC_FILE_RANGE_WRITE can block on writes greater than
 request queue size.  For some background, see
 http://thread.gmane.org/gmane.linux.kernel/687713/focus=688340

---
 man2/sync_file_range.2 | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/man2/sync_file_range.2 b/man2/sync_file_range.2
index 112658ac9..9bae126b6 100644
--- a/man2/sync_file_range.2
+++ b/man2/sync_file_range.2
@@ -70,6 +70,8 @@ before performing any write.
 .B SYNC_FILE_RANGE_WRITE
 Initiate write-out of all dirty pages in the specified
 range which are not presently submitted write-out.
+Note that even this may may block if you attempt to
+write more than request queue size.
 .TP
 .B SYNC_FILE_RANGE_WAIT_AFTER
 Wait upon write-out of all pages in the range