...oogle的Receive packet steering（接收包操控）来自Google的Receive flow steering（接收流操控）内存压缩（Memory compaction）针对Btrfs的直接I/O支持添加了新的驱动
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memory compaction algorithm [计] 存储器紧致算法
Allow for memory compaction 允许内存规整
compaction memory 紧密内存
memory y compaction 存储启致
If all the objects in the managed heap survive a collection, then there is no need for memory compaction.
如果托管堆中的所有对象均未被回收，则不需要压缩内存。
The GC can only contract contiguous blocks of memory from the end of the heap, so a compaction might be required to contract the heap.
GC 只能收缩从堆末尾开始的连续内存块，因此收缩堆可能需要进行压缩。
In a compaction phase, the objects that are on the heap are consolidated to allow any free memory to gather together and satisfy the current request.
在compaction阶段，heap上的对象会被整合以便将所有空闲空间收集起来满足当前的请求。
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