Xen devel - May 2008 - Modifying xentop

Hi,
  I''d like to extend xentop, so after some study I realized that I have
to start extending libxenstat. Let''s say I want to know how many 
free_pages a domain has, so I added a field in xen_sysctl_physinfo 
(include/xen/interface/sysctl.h) and one in xen_domctl_getdomaininfo 
(include/xen/interface/domctl.h). CIIW, I think the flow is like: 
libxenstat -> libxc -> xc_physinfo -> ? I think that here I''ve
got to
check the kernel side interface in drivers/xen/privcmd/privcmd.c but I 
can''t find anything that takes care of handling some physinfo struct.
Am I completely off road here? Do I have to look into the hypervisor 
instead of the guest kernel?
Thanks,
  Carlo

-- 
È molto più bello sapere qualcosa di tutto, che sapere tutto di una cosa.

Blaise Pascal

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Hi, Carlo

  If you skip the code tracking,
it is better to see arch_do_sysctl@xen/arch/x86/sysctl.c
(XEN_SYSCTL_physinfo).

P.S.
If you keep digging the code in your way,
you need to track the hypercall code (which includes assembler).

Thanks
Atsushi SAKAI



Carlo Bertoldi <mcbain@tiscali.it> wrote:
> Hi,
>   I''d like to extend xentop, so after some study I realized that I
have
> to start extending libxenstat. Let''s say I want to know how many 
> free_pages a domain has, so I added a field in xen_sysctl_physinfo 
> (include/xen/interface/sysctl.h) and one in xen_domctl_getdomaininfo 
> (include/xen/interface/domctl.h). CIIW, I think the flow is like: 
> libxenstat -> libxc -> xc_physinfo -> ? I think that here
I''ve got to
> check the kernel side interface in drivers/xen/privcmd/privcmd.c but I 
> can''t find anything that takes care of handling some physinfo
struct.
> Am I completely off road here? Do I have to look into the hypervisor 
> instead of the guest kernel?
> Thanks,
>   Carlo
> 
> -- 
> ネ molto
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