From: Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca>
Date: Wed, 19 Aug 2009 01:14:01 +0000 (-0400)
Subject: add SPLICE_F_MORE to lttd splice
X-Git-Tag: 0.80~23
X-Git-Url: http://git.lttng.org/?p=ltt-control.git;a=commitdiff_plain;h=4b6ff6ef7f2326bd4b43b7c683142b7c7f66330f

add SPLICE_F_MORE to lttd splice

    SPLICE_F_MORE      More  data  will  be  coming in a subsequent splice.
                       This is a helpful hint when the fd_out refers  to  a
                       socket  (see  also  the  description  of MSG_MORE in
                       send(2), and the description of TCP_CORK in tcp(7))

Will be a useful guideline for network sending daemons.

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca>
---

diff --git a/lttd/lttd.c b/lttd/lttd.c
index f21c411..61d2468 100644
--- a/lttd/lttd.c
+++ b/lttd/lttd.c
@@ -472,14 +472,14 @@ int read_subbuffer(struct fd_pair *pair)
 		printf_verbose("splice chan to pipe offset %lu\n",
 			(unsigned long)offset);
 		ret = splice(pair->channel, &offset, thread_pipe[1], NULL,
-			len, SPLICE_F_MOVE);
+			len, SPLICE_F_MOVE | SPLICE_F_MORE);
 		printf_verbose("splice chan to pipe ret %ld\n", ret);
 		if (ret < 0) {
 			perror("Error in relay splice");
 			goto write_error;
 		}
 		ret = splice(thread_pipe[0], NULL, pair->trace, NULL,
-			ret, SPLICE_F_MOVE);
+			ret, SPLICE_F_MOVE | SPLICE_F_MORE);
 		printf_verbose("splice pipe to file %ld\n", ret);
 		if (ret < 0) {
 			perror("Error in file splice");