dracut/0028-inst_simple-inst_dir-make-fast-case-faster.patch

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2011-10-19 13:30:00 +00:00
From 3f590c7840bb0897154f66a277be6bfaa63677bd Mon Sep 17 00:00:00 2001
From: John Reiser <jreiser@BitWagon.com>
Date: Fri, 26 Aug 2011 13:01:33 -0700
Subject: [PATCH] inst_simple, inst_dir: make fast case faster
This small stuff saves 1.7% per dropped statement during "dracut --profile".
Fixing the comment about /lib -> lib64 is REQUIRED!
---
dracut-functions | 16 +++++-----------
1 files changed, 5 insertions(+), 11 deletions(-)
diff --git a/dracut-functions b/dracut-functions
index 3edd4c7..f41fc7d 100755
--- a/dracut-functions
+++ b/dracut-functions
@@ -266,19 +266,13 @@ check_vol_slaves() {
}
# Install a directory, keeping symlinks as on the original system.
-# Example: if /lib64 points to /lib on the host, "inst_dir /lib/file"
+# Example: if /lib points to /lib64 on the host, "inst_dir /lib/file"
# will create ${initdir}/lib64, ${initdir}/lib64/file,
# and a symlink ${initdir}/lib -> lib64.
inst_dir() {
- local _file=""
- local _oldifs="$IFS"
- local _part
- local _dir="$1"
+ [[ -e ${initdir}"$1" ]] && return 0 # already there
- # fast out
- [[ -e ${initdir}$_dir ]] && return 0
-
- _part=${_dir%/*}
+ local _dir="$1" _part=${_dir%/*} _file
while [[ "$_part" != "${_part%/*}" ]] && ! [[ -e "${initdir}${_part}" ]]; do
_dir="$_part $_dir"
_part=${_part%/*}
@@ -310,9 +304,9 @@ inst_dir() {
# Location of the image dir is assumed to be $initdir
# We never overwrite the target if it exists.
inst_simple() {
- local _src target
[[ -f $1 ]] || return 1
- _src=$1 target="${2:-$1}"
+
+ local _src=$1 target="${2:-$1}"
if ! [[ -d ${initdir}$target ]]; then
[[ -e ${initdir}$target ]] && return 0
[[ -h ${initdir}$target ]] && return 0