[libvirt] [PATCH 1/3] cgroup: read more data from cgroup cpuacct.usage_percpu

[Osier Yang]

On 2012年08月31日 17:22, Guannan Ren wrote:
> 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 8541c7f..5dc0764 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);

Can it be that large?

>       if (rc<  0) {
>           rc = -errno;
>           VIR_DEBUG("Failed to read %s: %m\n", keypath);