[libvirt] [PATCH 00/11] Avoid numerous calls of virQEMUCapsCacheLookup

[Bjoern Walk]

Daniel P. Berrangé <berrange at redhat.com> [2018-10-24, 10:43PM +0100]:
> We could optimize this by jcalling virFileAccessibleAs
> once and storing the result in a global. Then just do a
> plain stat() call in process to check the st_ctime field
> for changes. We only need re-run the heavy virFileAccessibleAs
> check if st_ctime has changed (indicating a owner/group/acl
> change).

But can't access permission change outside of changing the actual device
file (e.g. cgroups or other OS capabilities)? Isn't that the whole
purpose of the virFileAccessibleAs gymnastics?

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