[PATCH]put xenstored tdb to tmpfs

[PATCH]put xenstored tdb to tmpfs

[Zhigang Wang]

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Hi,

This patch put the xenstored tdb into tmpfs. It will improve the performance
when there are intensive xenstore read/writes.

Signed-off-by: Zhigang Wang <zhigang.x.wang@oracle.com>

thanks,

zhigang





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--- xen-unstable/tools/hotplug/Linux/init.d/xend	2009-09-18 00:04:17.000000000 +0800
+++ xen-unstable/tools/hotplug/Linux/init.d/xend.new	2010-01-21 11:12:48.000000000 +0800
@@ -57,6 +57,13 @@
 	test -z "$XENCONSOLED_TRACE" || export XENCONSOLED_TRACE
 	[[ "$XENSTORED_TRACE" == @(yes|on|1) ]] && export XENSTORED_TRACE
 	[[ "$XENBACKENDD_DEBUG" == @(yes|on|1) ]] && export XENBACKENDD_DEBUG
+	pid=`cat /var/run/xenstore.pid 2>/dev/null`
+	if [ -z "$pid" -o ! -d "/proc/$pid" ]; then
+		dir=${XENSTORED_ROOTDIR:-/var/lib/xenstored}
+		if ! grep -q "$dir" /proc/mounts 2>/dev/null; then
+			mount -t tmpfs none "$dir"
+		fi
+	fi
 	xend start
 	await_daemons_up
 	;;

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