[Xen-devel] [OSSTEST PATCH 1/3] ts-xen-build-prep: Run the backgrounded resize2fs with ionice

[Ian Jackson <ian.jackson@xxxxxxxxxxxxx>]

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@xxxxxxxxxxxxx>
---
 ts-xen-build-prep |    5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

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);
     }
 }
 
-- 
1.7.10.4


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