Re: [Xen-devel] [PATCH] common/domain_page: Drop domain_mmap_cache infrastructure

["Jan Beulich" <JBeulich@xxxxxxxx>]

>>> On 09.08.17 at 20:21, <andrew.cooper3@xxxxxxxxxx> wrote:
> This infrastructure is used exclusively by the x86 do_mmu_update() hypercall.
> Mapping and unmapping domain pages is probably not the slow part of that
> function, but even with an opencoded caching implementation, Bloat-o-meter
> reports:
> 
>   function                                     old     new   delta
>   do_mmu_update                               6815    6573    -242
> 
> The !CONFIG_DOMAIN_PAGE stub code has a mismatch between mapping and
> unmapping, which is a latent bug.
> 
> Signed-off-by: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>

Reviewed-by: Jan Beulich <jbeulich@xxxxxxxx>


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