On 04/20/2012 12:26 AM, Avi Kivity wrote: > This patchset simplifies the freeing by RCU of mmu pages. > > Xiao, I'm sure you thought of always freeing by RCU. Why didn't you choose > this way? I saves a couple of atomics in the fast path. > Avi, we have discussed it last year: https://lkml.org/lkml/2011/6/29/177 I have optimized/simplified for "write flood" a lot, but, unfortunately, the zapping sp is still frequently. Maybe we can cache the zapped sp in a invalid_sp_list to reduce the frequency. Or, we may use SLAB_DESTROY_BY_RCU to free the shadow page. -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
