From: Pádraig Brady <P@draigBrady.com>
Date: Tue, 1 May 2012 20:50:49 +0000 (+0100)
Subject: cp,mv,install: provide POSIX_FADV_SEQUENTIAL hint to input
X-Git-Tag: v8.17~16
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=15f1d0c9aad23f5ada64594c127ca015d4d8dbfe;p=thirdparty%2Fcoreutils.git

cp,mv,install: provide POSIX_FADV_SEQUENTIAL hint to input

This was inadvertently omitted from v8.5-104-g47076e3,
and gives the same 5% speedup when copying from an SSD.

* src/copy.c (copy_internal): Apply the FADVISE_SEQUENTIAL hint.
---

diff --git a/src/copy.c b/src/copy.c
index 26bbcf22ea..844ebcd78a 100644
--- a/src/copy.c
+++ b/src/copy.c
@@ -39,6 +39,7 @@
 #include "cp-hash.h"
 #include "extent-scan.h"
 #include "error.h"
+#include "fadvise.h"
 #include "fcntl--.h"
 #include "fiemap.h"
 #include "file-set.h"
@@ -980,6 +981,8 @@ copy_reg (char const *src_name, char const *dst_name,
       size_t buf_alignment_slop = sizeof (word) + buf_alignment - 1;
       size_t buf_size = io_blksize (sb);
 
+      fdadvise (source_desc, 0, 0, FADVISE_SEQUENTIAL);
+
       /* Deal with sparse files.  */
       bool make_holes = false;
       bool sparse_src = false;