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>

2 files changed, 35 insertions, 0 deletions

diff --git a/meta/recipes-devtools/rpm/rpm/rpm-nofsync.patch b/meta/recipes-devtools/rpm/rpm/rpm-nofsync.patch
new file mode 100644
index 0000000000..33039ad990
--- /dev/null
+++ b/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;
diff --git a/meta/recipes-devtools/rpm/rpm_5.4.0.bb b/meta/recipes-devtools/rpm/rpm_5.4.0.bb
index 93951d2c61..45dd4e1ee2 100644
--- a/meta/recipes-devtools/rpm/rpm_5.4.0.bb
+++ b/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 \