On 04/27/2016 07:30 PM, Michael S. Tsirkin wrote: > On Fri, Mar 25, 2016 at 10:34:33AM +0800, Jason Wang wrote: >> > Current pre-sorted memory region array has some limitations for future >> > device IOTLB conversion: >> > >> > 1) need extra work for adding and removing a single region, and it's >> > expected to be slow because of sorting or memory re-allocation. >> > 2) need extra work of removing a large range which may intersect >> > several regions with different size. >> > 3) need trick for a replacement policy like LRU >> > >> > To overcome the above shortcomings, this patch convert it to interval >> > tree which can easily address the above issue with almost no extra >> > work. >> > >> > The patch could be used for: >> > >> > - Extend the current API and only let the userspace to send diffs of >> > memory table. >> > - Simplify Device IOTLB implementation. > Does this affect performance at all? > In pktgen test, no difference. Thanks -- 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
