From: Richard Jones <rjones@redhat.com>
Date: Mon, 7 Jun 2010 14:29:31 +0000 (+0100)
Subject: Use the noop scheduler inside the appliance.
X-Git-Tag: 1.3.20~7
X-Git-Url: http://git.annexia.org/?a=commitdiff_plain;h=1253f577fa162b9170b22f3c543167aa99795920;p=libguestfs.git

Use the noop scheduler inside the appliance.

In my limited tests, this seems to make a small but noticable
difference, improving the performance of some straightforward
read operations by a little over 10%.

For more information see:
http://kbase.redhat.com/faq/docs/DOC-5428
---

diff --git a/appliance/init b/appliance/init
index c622788..b8133ca 100755
--- a/appliance/init
+++ b/appliance/init
@@ -66,6 +66,9 @@ lvm vgchange -ay --ignorelockingfailure
 # Improve virtio-blk performance (RHBZ#509383).
 for f in /sys/block/vd*/queue/rotational; do echo 1 > $f; done
 
+# http://kbase.redhat.com/faq/docs/DOC-5428
+for f in /sys/block/[hsv]d*/queue/scheduler; do echo noop > $f; done
+
 # Keep these to enhance the usefulness of debug output.
 ls -l /dev
 cat /proc/mounts