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>
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@ -0,0 +1,34 @@
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Backport from RPM 5.4.1 CVS, disabled fsync.
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Signed-off-by: Mark Hatle <mark.hatle@windriver.com>
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diff -ur rpm-5.4.0.orig/CHANGES rpm-5.4.0/CHANGES
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--- rpm-5.4.0.orig/CHANGES 2010-12-29 07:51:38.000000000 -0600
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+++ rpm-5.4.0/CHANGES 2011-02-15 20:54:27.021926840 -0600
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@@ -1,4 +1,5 @@
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5.4.0 -> 5.4.1:
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+ - jbj: remove fsync(2) after file install, its intolerably slow.
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5.3.7 -> 5.4.0:
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- jbj: remove markReplacedFiles.
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diff -ur rpm-5.4.0.orig/lib/fsm.c rpm-5.4.0/lib/fsm.c
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--- rpm-5.4.0.orig/lib/fsm.c 2009-12-10 12:52:18.000000000 -0600
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+++ rpm-5.4.0/lib/fsm.c 2011-02-15 20:55:04.372938221 -0600
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@@ -1017,7 +1017,17 @@
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(void) fsmNext(fsm, IOSM_NOTIFY);
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}
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+#ifdef DYING
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+/* Measurements from installing kernel-source package:
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+ * +fsync
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+ * total: 1 0.000000 MB 640.854524 secs
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+ * +fdatasync
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+ * total: 1 0.000000 MB 419.983200 secs
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+ * w/o fsync/fdsatasync:
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+ * total: 1 0.000000 MB 12.492918 secs
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+ */
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xx = fsync(Fileno(fsm->wfd));
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+#endif
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if (st->st_size > 0 && (fsm->fdigest || fsm->digest)) {
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void * digest = NULL;
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@ -54,6 +54,7 @@ SRC_URI = "http://www.rpm5.org/files/rpm/rpm-5.4/rpm-5.4.0-0.20101229.src.rpm;ex
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file://header-include-fix.patch \
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file://rpm-platform.patch \
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file://rpm-showrc.patch \
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file://rpm-nofsync.patch \
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"
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# file://hdraddorappend.patch \
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