Re: [Libguestfs] [PATCH for discussion only 0/3] Implement mutexes to limit number of concurrent instances of libguestfs.
On Mon, Feb 18, 2013 at 09:20:42PM +0000, Richard W.M. Jones wrote:
These three patches (for discussion only, NOT to be applied)
implement
a mutex system that lets the user limit the number of libguestfs
instances that can be launched per host. There are two uses that I
have identified for this: firstly so we can enable parallel-tests (the
default in automake >= 1.13) without blowing up the host. Secondly
oVirt has raised concerns about how to limit the number of libguestfs
appliances that can run to prevent this from interfering with their
ordinary guests.
IMHO this whole feature is of dubious worth & overly simplistic. For
automake you can already control parallelization of tests just by
varying the '-jNNN' number.
If oVirt wants to limit the number of appliances it creates, it should
just do so itself. For appliances not directly invoked by ovirt, I don't
see that this is going to help, since you can't rely on the env vars
being set.
Daniel
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