[patch] Do lvm in one go

0003-Speed-up-LVM-activation.patch (text/plain), 2.15 KB, created by Xake on 2011-01-31 05:36:22 UTC

From b39cb390f3cddb290d31a69add294ba4904cdbeb Mon Sep 17 00:00:00 2001
From: Peter Hjalmarsson <[e-mail]>
Date: Sun, 30 Jan 2011 22:48:54 +0100
Subject: [PATCH 3/4] Speed up LVM-activation

Change vgscan and vgchange so they are done in one go.
Faster since less work for the lvm command.
vgscan is still needed for some cases like dmcrypt where
/etc/lvm/cache is created, but not updated with the unlocked devices.
---
 defaults/initrd.scripts |   15 ++++++++++-----
 defaults/linuxrc        |    6 ------
 2 files changed, 10 insertions(+), 11 deletions(-)

diff --git a/defaults/initrd.scripts b/defaults/initrd.scripts
index 20acc11..357fb71 100755
--- a/defaults/initrd.scripts
+++ b/defaults/initrd.scripts
@@ -637,17 +637,22 @@ startVolumes() {
 
 	if [ "${USE_LVM_NORMAL}" = '1' ]
 	then
-		if [ -e '/bin/vgscan' -a -e '/bin/vgchange' ]
+		if [ -e '/bin/lvm' ]
 		then
 			for dev in ${RAID_DEVICES}
 			do
 				setup_md_device "${dev}"
 			done
 
-			good_msg "Scanning for Volume Groups"
-			/bin/vgscan --ignorelockingfailure --mknodes 2>/dev/null
-			good_msg "Activating Volume Groups"
-			/bin/vgchange -ay --sysinit 2>/dev/null
+			# This is needed for /bin/lvm to accept the following logic
+			lvm_commands="#! /bin/lvm"
+			# If there is a cahe, update it. Unbreak at least dmcrypt
+			[ -d /etc/lvm/cache ] && lvm_commands="$lvm_commands \nvgscan"
+			# To activate volumegroups on all devices in the cache
+			lvm_commands="$lvm_commands \nvgchange -ay --sysinit"
+			# And finally execute it all (/proc/... needed if lvm is compiled without readline)
+			good_msg "Scanning for and activating Volume Groups"
+			printf "%b\n" "$lvm_commands" | /bin/lvm /proc/self/fd/0
 
 			# Disable EVMS since lvm is activated and they dont work together.
 			if [ "${USE_EVMS_NORMAL}" = '1' ]
diff --git a/defaults/linuxrc b/defaults/linuxrc
index d8b910c..bbe397e 100755
--- a/defaults/linuxrc
+++ b/defaults/linuxrc
@@ -31,12 +31,6 @@ then
 	[ -e /linuxrc ] && rm /linuxrc
 fi
 
-if [ -e /bin/lvm ]
-then
-	[ -e /bin/vgscan   ] || ln -s /bin/lvm /bin/vgscan
-	[ -e /bin/vgchange ] || ln -s /bin/lvm /bin/vgchange
-fi
-
 quiet_kmsg
 
 CMDLINE=`cat /proc/cmdline`
-- 
1.7.4.rc3