From c402eebc71770390f8ce1b400dfe19cbfca30ec7 Mon Sep 17 00:00:00 2001
From: Guannan Ren <gren@redhat.com>
Date: Fri, 31 Aug 2012 16:31:30 +0800
Subject: [PATCH] cgroup: read more data from cgroup cpuacct.usage_percpu

On NUMA machine, the length of string got from file
cpuacct.usage_percpu is quite large, so expand the
limit of 1024 bytes.

errors like:
Failed to read file \
'/cgroup/cpuacct/libvirt/qemu/rhel6q/cpuacct.usage_percpu': \
Value too large for defined data type
---
 src/util/cgroup.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/util/cgroup.c b/src/util/cgroup.c
index 8541c7fdae..5dc07649d3 100644
--- a/src/util/cgroup.c
+++ b/src/util/cgroup.c
@@ -360,7 +360,7 @@ static int virCgroupGetValueStr(virCgroupPtr group,
 
     VIR_DEBUG("Get value %s", keypath);
 
-    rc = virFileReadAll(keypath, 1024, value);
+    rc = virFileReadAll(keypath, 1024*1024, value);
     if (rc < 0) {
         rc = -errno;
         VIR_DEBUG("Failed to read %s: %m\n", keypath);