[$] Proactive compaction for the kernel

Many applications benefit significantly from the use of hugepages. However, huge-page allocations often incur a high latency or evenfail under fragmented memory conditions. Proactive compaction may provide aneffective solution to these problems by doing memory compaction in thebackground. With guest author Nitin Gupta's proposed proactive compactionimplementation, typical huge-page allocation latencies are reduced by a factor of 70-80 while incurring minimal CPUoverhead.<p>Subscribers can read on for the full story from the upcoming weeklyedition.