linux-kernel - [PATCH 3/3] Inform kernel of FADV

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Date:	Tue, 23 Nov 2010 09:49:52 -0500
From:	Ben Gamari <bgamari.foss@...il.com>
To:	KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>,
	Minchan Kim <minchan.kim@...il.com>, rsync@...ts.samba.org
Cc:	linux-kernel@...r.kernel.org, linux-mm@...ck.org,
	Rik van Riel <riel@...hat.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Johannes Weiner <hannes@...xchg.org>,
	Nick Piggin <npiggin@...nel.dk>,
	Ben Gamari <bgamari.foss@...il.com>
Subject: [PATCH 3/3] Inform kernel of FADV_DONTNEED hint in receiver

Use the FADV_DONTNEED fadvise hint after finishing writing to a
destinataion fd in the receiver.
---
 receiver.c |    6 ++++++
 1 files changed, 6 insertions(+), 0 deletions(-)

diff --git a/receiver.c b/receiver.c
index 39c5e49..33b21fb 100644
--- a/receiver.c
+++ b/receiver.c
@@ -721,6 +721,12 @@ int recv_files(int f_in, char *local_name)
 		recv_ok = receive_data(f_in, fnamecmp, fd1, st.st_size,
 				       fname, fd2, F_LENGTH(file));
 
+                if (do_fadvise(fd2, 0, 0, POSIX_FADV_DONTNEED) != 0) {
+                        rsyserr(FERROR_XFER, errno,
+                                "fadvise failed in writing %s",
+                                full_fname(fname));
+                }
+
 		log_item(log_code, file, &initial_stats, iflags, NULL);
 
 		if (fd1 != -1)
-- 
1.7.1

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