the array params is allocated by VIR_ALLOC_N in cmdCPUStats. it had been set to zero. No need to reset it to zero again, and this reset here is incorrect too, nparams * ncpus is the array length not the size of params array. Signed-off-by: Gao feng <gaofeng(a)cn.fujitsu.com&gt; --- src/qemu/qemu_driver.c | 1 - 1 file changed, 1 deletion(-) diff --git a/src/qemu/qemu_driver.c b/src/qemu/qemu_driver.c index 9f71160..7a329f0 100644 --- a/src/qemu/qemu_driver.c +++ b/src/qemu/qemu_driver.c @@ -15820,7 +15820,6 @@ qemuDomainGetPercpuStats(virDomainObjPtr vm, if (virCgroupGetCpuacctPercpuUsage(priv->cgroup, &buf)) goto cleanup; pos = buf; - memset(params, 0, nparams * ncpus); /* return percpu cputime in index 0 */ param_idx = 0; -- 1.8.4.2