Re: [PATCH 7/7] KVM: MMU: don't walk every parent pages while markunsync

[Xiao Guangrong]

Xiao Guangrong wrote:
> While we mark the parent's unsync_child_bitmap, if the parent is already
> unsynced, it no need walk it's parent, it can reduce some unnecessary
> workload
> 

Hi Avi, Marcelo,

About two months ago, i have sent this optimization, it just a little performance
improved (~0.5%) at that time, now, we allow more page become unsync, this path is
called higher frequency, during my test, kernelbench show the performance improved
~2%, so, i think we may apply it now :-)
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/