From: Ian Jackson <ian.jackson@eu.citrix.com>
Date: Wed, 4 Jun 2014 11:24:06 +0000 (+0100)
Subject: ts-xen-build-prep: Run the backgrounded resize2fs with ionice
X-Git-Tag: wip.xsm-13-actual.base~186
X-Git-Url: http://xenbits.xensource.com/gitweb?a=commitdiff_plain;h=ee31a32af1fc9a38ad08b4a36ee69e1c58ea0828;p=people%2Fliuw%2Fosstest.git

ts-xen-build-prep: Run the backgrounded resize2fs with ionice

We wrap this in
  ionice -cBest-Effort -n7

This is an attempt to stop resize2fs from starving builds of IO
bandwidth.  We have been seeing that some IO-intensive build steps
(notably, configure) can take unreasonable amounts of time and we
suspect resize2fs as the culprit.

Signed-off-by: Ian Jackson <Ian.Jackson@eu.citrix.com>
---

diff --git a/ts-xen-build-prep b/ts-xen-build-prep
index 0e68cd3..05a7857 100755
--- a/ts-xen-build-prep
+++ b/ts-xen-build-prep
@@ -159,7 +159,10 @@ sub lvextend1 ($$$) {
     if (!$background) {
 	target_cmd_root($ho, $cmd, $timeout);
     } else {
-	target_cmd_root($ho, "$cmd >>resizefs.log 2>&1 </dev/null &", 30);
+	target_cmd_root($ho,
+			"ionice -cBest-Effort -n7 ".
+			"$cmd >>resizefs.log 2>&1 </dev/null &",
+			30);
     }
 }