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Re: [libvirt] PATCH: 13/25: Remove global state from XM driver



On Tue, Jan 13, 2009 at 05:44:00PM +0000, Daniel P. Berrange wrote:
> The 'xm' driver currently keeps all its state in a global static
> variables. Not cool, since we access this from all sorts of places
> and its hard to guarentee thread safety. So we move the state into
> the virConnect object. This will increase memory usage if a single
> process has multiple Xen connections open though.
> 
> Undecided whether this is a big problem or not. If so, I'll can
> try and redo the next thread locking patch to use a lock over the
> existing global state.
> 
>  xen_inotify.c |    4 
>  xen_unified.c |    1 
>  xen_unified.h |   14 ++-
>  xm_internal.c |  262 +++++++++++++++++++++++++++++-----------------------------
>  xm_internal.h |    3 
>  5 files changed, 149 insertions(+), 135 deletions(-)

The patch appears straightforward enough, and for the XM driver
(ie. ancient history Xen) I'm sure we don't care much about a tiny bit
of extra memory.

Rich.

-- 
Richard Jones, Emerging Technologies, Red Hat  http://et.redhat.com/~rjones
virt-p2v converts physical machines to virtual machines.  Boot with a
live CD or over the network (PXE) and turn machines into Xen guests.
http://et.redhat.com/~rjones/virt-p2v


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