On Fri 2019-09-13 14:04:57, Greg Kroah-Hartman wrote:
> [ Upstream commit 87ee613d076351950b74383215437f841ebbeb75 ]
>
> In most common cases VP index of a vcpu matches its vcpu index. Userspace is,
> however,
> free to set any mapping it wishes and we need to account for that when we
> need to find a
> vCPU with a particular VP index. To keep search algorithms optimal in both
> cases
> introduce 'num_mismatched_vp_indexes' counter showing how many vCPUs with
> mismatching VP
> index we have. In case the counter is zero we can assume vp_index == vcpu_idx.
I don't see why this is stable material.
> u64 hv_reenlightenment_control;
> u64 hv_tsc_emulation_control;
> u64 hv_tsc_emulation_status;
> +
> + /* How many vCPUs have VP index != vCPU index */
> + atomic_t num_mismatched_vp_indexes;
> };
>
It adds a write-only variable ...
Best regards,
Pavel
--
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures)
http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
