Re: [Xen-devel] [PATCH v2 00/12] x86: indirect call overhead reduction

2018-08-29 Thread Jan Beulich
>>> On 29.08.18 at 15:55, wrote: > While indirect calls have always been more expensive than direct ones, > their cost has further increased with the Spectre v2 mitigations. In a > number of cases we simply pointlessly use them in the first place. In > many other cases the indirection solely exist

[Xen-devel] [PATCH v2 00/12] x86: indirect call overhead reduction

2018-08-29 Thread Jan Beulich
While indirect calls have always been more expensive than direct ones, their cost has further increased with the Spectre v2 mitigations. In a number of cases we simply pointlessly use them in the first place. In many other cases the indirection solely exists to abstract from e.g. vendor specific ha