rpm: Avoid fsync when writing files

By default RPM strives for the safest possible file creation and
enforces fsync on each file.  This changes that default by backporting
the fsync disabled from the latest CVS snapshot.

This will cut a few minutes off the rootfs generation using RPM.

Signed-off-by: Mark Hatle <mark.hatle@windriver.com>

meta/recipes-devtools/rpm/rpm/rpm-nofsync.patch

@@ -0,0 +1,34 @@
+Backport from RPM 5.4.1 CVS, disabled fsync.
+
+Signed-off-by: Mark Hatle <mark.hatle@windriver.com>
+
+diff -ur rpm-5.4.0.orig/CHANGES rpm-5.4.0/CHANGES
+--- rpm-5.4.0.orig/CHANGES	2010-12-29 07:51:38.000000000 -0600
++++ rpm-5.4.0/CHANGES	2011-02-15 20:54:27.021926840 -0600
+@@ -1,4 +1,5 @@
+ 5.4.0 -> 5.4.1:
++    - jbj: remove fsync(2) after file install, its intolerably slow.
+ 
+ 5.3.7 -> 5.4.0:
+     - jbj: remove markReplacedFiles.
+diff -ur rpm-5.4.0.orig/lib/fsm.c rpm-5.4.0/lib/fsm.c
+--- rpm-5.4.0.orig/lib/fsm.c	2009-12-10 12:52:18.000000000 -0600
++++ rpm-5.4.0/lib/fsm.c	2011-02-15 20:55:04.372938221 -0600
+@@ -1017,7 +1017,17 @@
+ 	    (void) fsmNext(fsm, IOSM_NOTIFY);
+     }
+ 
++#ifdef DYING
++/* Measurements from installing kernel-source package:
++ * +fsync
++ *     total:               1      0.000000 MB    640.854524 secs
++ * +fdatasync
++ *     total:               1      0.000000 MB    419.983200 secs
++ * w/o fsync/fdsatasync:
++ *     total:               1      0.000000 MB     12.492918 secs
++ */
+     xx = fsync(Fileno(fsm->wfd));
++#endif
+ 
+     if (st->st_size > 0 && (fsm->fdigest || fsm->digest)) {
+ 	void * digest = NULL;

meta/recipes-devtools/rpm/rpm_5.4.0.bb

@@ -54,6 +54,7 @@ SRC_URI = "http://www.rpm5.org/files/rpm/rpm-5.4/rpm-5.4.0-0.20101229.src.rpm;ex
 	   file://header-include-fix.patch \
 	   file://rpm-platform.patch \
 	   file://rpm-showrc.patch \
+	   file://rpm-nofsync.patch \
 	  "
 
 #           file://hdraddorappend.patch \