Re: [PATCH 4/5] KVM: MMU: store generation-number into mmio spte

Paolo Bonzini
2013-03-18T11:19:20Z

Il 15/03/2013 16:29, Xiao Guangrong ha scritto:
> +/*
> + * spte bits of bit 3 ~ bit 11 are used as low 9 bits of
> + * generation, the bits of bits 52 ~ bit 61 are used as
> + * high 12 bits of generation.
> + */

High 10 bits.

How often does the generation number change? Especially with Takuya's
patches, using just 10 bits for the generation might be enough and
simplifies the code.

Paolo