http://lwn.net/Articles/7868/
The following patch originally by Martin Bligh exports some information about the buddy allocator. Each column of numbers represents the number of pages of that order which are available. In this case, there are 5 chunks of 2^2*PAGE_SIZE available in ZONE_DMA, and 101 chunks of 2^4*PAGE_SIZE availble in ZONE_NORMAL, etc... This information can give you a good idea about how fragmented memory is and give you a clue as to how big of an area you can safely allocate. Node 0, zone DMA 0 4 5 4 4 3 ... Node 0, zone Normal 1 0 0 1 101 8 ... Node 0, zone HighMem 2 0 0 1 1 0 ... -- Dave Hansen haveblue@us.ibm.com
本文介绍了一项由Martin Bligh提出的补丁,该补丁导出了Buddy内存分配器的状态信息。这些信息展示了不同内存区域中可用页面的数量,有助于评估内存碎片情况并为安全分配提供依据。
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