[libvirt] [PATCH 00/22] New CPU related APIs

[Chris Venteicher]

Quoting Jiri Denemark (2018-05-29 09:34:02)
> Hi Chris,
> 
> > The new hypervisor specific compare and baseline commands seem to depend on 
> > qemuCaps being pre-populated with model data that is specific to a hypervisor 
> > instance.
> > 
> > How do we make sure the qemuCaps are pre-populated with cpu model data for any 
> > arbitrary hypervisor (with a different exec path, arch, etc) that we can issue 
> > the hypervisor compare or baseline commands against?
> 
> The cache lookup functions automatically generate qemuCaps if they don't
> exist (i.e., someone asked for an emulator binary which is not known to
> libvirt yet) or if they need to be refreshed (e.g., the QEMU binary
> changed in the meantime). It's a bit hidden behind the generic
> virFileCache object which uses the following callbacks to handle QEMU
> caps cache:
> 
>     virFileCacheHandlers qemuCapsCacheHandlers = {
>         .isValid = virQEMUCapsIsValid,
>         .newData = virQEMUCapsNewData,
>         .loadFile = virQEMUCapsLoadFile,
>         .saveFile = virQEMUCapsSaveFile,
>         .privFree = virQEMUCapsCachePrivFree,
>     };
> 
> Jirka

Got it.  Read through cache of sorts.  Thanks Jirka and Collin.

Chris.