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SubjectRe: [PATCH 4/8] KVM: MMU: drop unsync_child_bitmap
On 12/16/2011 12:16 PM, Xiao Guangrong wrote:
> unsync_child_bitmap is used to record which spte has unsync page or unsync
> children, we can set a free bit in the spte instead of it
>

unsync_child_bitmap takes one cacheline; the shadow page table takes
64. This will make unsync/resync much more expensive.

I suggest to put unsync_child_bitmap at the end (together with
unsync_children) and simply not allocate it when unneeded (have two
kmem_caches for the two cases).


--
error compiling committee.c: too many arguments to function



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