On 14.06.2024 15:56, Andrew Cooper wrote:
> On 23/05/2024 4:34 pm, Jan Beulich wrote:
>> On 23.05.2024 13:16, Andrew Cooper wrote:
>>> Right now, xstate_ctxt_size() performs a cross-check of size with CPUID in
>>> for
>>> every call. This is expensive, being used for domain create/migrate, as
>>
On 23/05/2024 4:34 pm, Jan Beulich wrote:
> On 23.05.2024 13:16, Andrew Cooper wrote:
>> Right now, xstate_ctxt_size() performs a cross-check of size with CPUID in
>> for
>> every call. This is expensive, being used for domain create/migrate, as well
>> as to service certain guest CPUID instructi
On 23.05.2024 13:16, Andrew Cooper wrote:
> Right now, xstate_ctxt_size() performs a cross-check of size with CPUID in for
> every call. This is expensive, being used for domain create/migrate, as well
> as to service certain guest CPUID instructions.
>
> Instead, arrange to check the sizes once
Right now, xstate_ctxt_size() performs a cross-check of size with CPUID in for
every call. This is expensive, being used for domain create/migrate, as well
as to service certain guest CPUID instructions.
Instead, arrange to check the sizes once at boot. See the code comments for
details. Right
