[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] Re: [Xen-devel] Memory allocation in NUMA system
On 25/7/08 08:51, "Yang, Xiaowei" <xiaowei.yang@xxxxxxxxx> wrote: >> How about by default we guarantee no more than 25% of a node's memory is >> classed as 'DMA memory', and we reduce the DMA address width variable in Xen >> to ensure that? >> >> So, in your example, we would reduce dma_bitsize to 30. >> >> -- Keir >> >> > Yes, a good suggestion! Indeed the only reason we still have dma_bitsize is to break the select-NUMA-node-first memory allocation search strategy. So tweaking the dma_bitsize approach further to strike the correct NUMA-vs-DMA balance does seem the right thing to do. Feel free to work up a patch. -- Keir _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxxxxxxxx http://lists.xensource.com/xen-devel
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