[libvirt] [PATCH] Increase size of buffer for xend response

Eric Blake eblake at redhat.com
Fri Sep 2 01:50:00 UTC 2011


On 09/01/2011 06:36 PM, Jim Fehlig wrote:
> On systems with many pcpus, the sexpr returned by xend can be quite
> large for dom0 when it is configured to have #vcpus = #pcpus (default).
> E.g. on a 80 pcpu system, where dom0 had 80 vcpus, the sexpr details
> for dom0 was 73817 bytes!  Increase maximum buffer size to 256k.
> ---
>   src/xen/xend_internal.c |    2 +-
>   1 files changed, 1 insertions(+), 1 deletions(-)
>
> diff --git a/src/xen/xend_internal.c b/src/xen/xend_internal.c
> index 957cd17..1fdebe1 100644
> --- a/src/xen/xend_internal.c
> +++ b/src/xen/xend_internal.c
> @@ -56,7 +56,7 @@
>    * The number of Xen scheduler parameters
>    */
>
> -#define XEND_RCV_BUF_MAX_LEN 65536
> +#define XEND_RCV_BUF_MAX_LEN 262144

I'd write this as:

#define XEND_RCV_BUF_MAX_LEN (256 * 1024)

for a bit more legibility.  ACK with that change.

-- 
Eric Blake   eblake at redhat.com    +1-801-349-2682
Libvirt virtualization library http://libvirt.org




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