Juergen Gross writes ("Re: [Xen-devel] [PATCH 3/3] tools/libxc: retry hypercall
in case of EFAULT"):
> On 15/06/18 16:54, Andrew Cooper wrote:
> > Probably a very minor issue, but is it worth caching never_fault once
> > when opening the xc_interface? Calling into a separate shared object on
> > every domctl isn't the height of efficiency.
>
> Via a global variable or by extending struct xc_interface_core? Ian?
I think this is a very minor point. Are domctls really a hot path ?
A cross-shared-library call is a very minor overhead.
If this is to be done, it should not be a global variable.
Ian.
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