Re: [Xen-devel] [PATCH]Add free memory size of every NUMA node in phsical info

["Daniel P. Berrange" <berrange@xxxxxxxxxx>]

On Tue, Feb 26, 2008 at 10:02:36AM +0800, Duan, Ronghui wrote:
> Returns free memory size per node in "xm info". This info can help users
> who want to bind their guest domain in one node of their NUMA machines
> thought set CPU affinity. I also write IA64 part support which I would
> send to XEN-IA64 mail-list. Thanks.

AFAICT, changing the ABI of the 'physinfo' sysctl is completely unneccessary.

The per-node NUMA free memory information is already available to Dom0
via the existing 'availheap' sysctl:

  #define XEN_SYSCTL_availheap         9
  struct xen_sysctl_availheap {
      /* IN variables. */
      uint32_t min_bitwidth;  /* Smallest address width (zero if don't care). */
      uint32_t max_bitwidth;  /* Largest address width (zero if don't care). */
      int32_t  node;          /* NUMA node of interest (-1 for all nodes). */
      /* OUT variables. */
      uint64_aligned_t avail_bytes;/* Bytes available in the specified region. 
*/
  };


If you want to display this info in 'xm info', then simply invoke this
availheap sysctl call to fetch the data.

Dan.
-- 
|=- Red Hat, Engineering, Emerging Technologies, Boston.  +1 978 392 2496 -=|
|=-           Perl modules: http://search.cpan.org/~danberr/              -=|
|=-               Projects: http://freshmeat.net/~danielpb/               -=|
|=-  GnuPG: 7D3B9505   F3C9 553F A1DA 4AC2 5648 23C1 B3DF F742 7D3B 9505  -=| 

_______________________________________________
Xen-devel mailing list
Xen-devel@xxxxxxxxxxxxxxxxxxx
http://lists.xensource.com/xen-devel