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SubjectRe: [PATCH 4/6] x86/kvm: introduce per cpu vcpu masks
On 26.07.21 15:32, Paolo Bonzini wrote:
> On 01/07/21 17:41, Juergen Gross wrote:
>> In order to support high vcpu numbers per guest don't use on stack
>> vcpu bitmasks. As all those currently used bitmasks are not used in
>> functions subject to recursion it is fairly easy to replace them with
>> percpu bitmasks.
>> Disable preemption while such a bitmask is being used in order to
>> avoid double usage in case we'd switch cpus.
>> Signed-off-by: Juergen Gross <>
> Please use a local_lock instead of disabling preemption.


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